CN104996293A - Seed production method for sweet corn hybrid--Zhetian No. 11 - Google Patents
Seed production method for sweet corn hybrid--Zhetian No. 11 Download PDFInfo
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Abstract
The invention discloses a seed production method for a sweet corn hybrid--Zhetian No. 11, which belongs to the technical field of seed production of the crop--corn. The seed production method comprises the following steps: breeding of selfing lines; safety isolation; adjustment of sowing periods; adoption of a proper row ratio; removal of abnormal and inferior plants; castration of a female parent; elimination of a male parent; and timely harvesting. A selfing line PE106-11 is used as the female parent and a selfing line PE3016-4 is used as the male parent for preparation of the sweet corn hybrid. The sweet corn hybrid--Zhetian No. 11 obtained in the invention has the characteristics of high and stable yield, strong disease resistance and high biological yield.
Description
Technical field
The invention belongs to crops maize seed production technique field, particularly a kind of producing method for seed of sweet corn hybrid Zhejiang sweet 11.
Background technology
The hereditary basis of Sweet Corn Germplasm resource is narrow, and ecotype is comparatively single, and the Sweet Corn Germplasm resource of China is mainly from the Taiwan of the U.S., Japan, Thailand and China.At present mainly through methods such as backcross transformation, second cycle line selection, recurrent selections, carry out the seed selection of inbred line of sweet corn.Along with the raising of people's living standard, require more and more higher to sweet corn quality, local flavor and light letter cultivation.In order to meet the need of market, increase the planting benefit of peasant, cultivation output is high, product are of fine quality, the kind of better resistance, and to transforming agricultural production, development profitable agriculture, realizes increasing peasant income and have very large realistic meaning.
For overcoming the few shortcoming of Sweet Corn Germplasm resource, should as early as possible by domestic and international sweet corn new varieties, new material is introduced in a large number, enrich germ plasm resource, conventional means and molecular marking technique is utilized to identify germ plasm resource, classify, different Heterotic Groups is divided into, as male parent group (A group), maternal group (B group) according to Heterosis.With sweet corn Heterosis for core, germplasm materials is pushed open to both sides, adopt Recycling breeding strategy strategy to improve coordinate force.To attach most importance to Comprehensive Traits such as taking into account disease resistance, lodging resistance, eurytopicity with high-quality, select high-quality, high-combining ability inbred line of sweet corn, improve breeding efficiency.
Summary of the invention
The object of the invention is to overcome the shortcoming that exists in above-mentioned prior art with not enough, a kind of producing method for seed of sweet corn hybrid Zhejiang sweet 11 is provided.Producing method for seed of the present invention utilizes hybrid vigour theoretical, and select the hybridization between selfed lines that coordinate force is high, product are of fine quality, better resistance, genotype are isozygotied, parents' affiliation is far away, select quality better, output is high, the sweet corn hybrid that disease resistance is good.
Object of the present invention is achieved through the following technical solutions: a kind of producing method for seed of sweet corn hybrid Zhejiang sweet 11, comprise inbred line breeding, Secure isolation, date of seeding, regulates, be suitable for row ratio, roguing, maternal emasculation, roots out male parent, in good time results, utilize self bred inbred line PE106-11 for female parent, self bred inbred line sw3016-4 is male parent, preparation sweet corn hybrid.
Wherein said self bred inbred line PE106-11 is that after low generation system 05cPE02 and Hua Zhen of sweet corn introduced from the Chinese Academy of Agricultural Sciences is hybridized, through 8 generations, selfing obtains.
Described self bred inbred line sw3016-4 is from the white sweet glutinous No. 1 white inbred line of sweet corn obtained through the selfing of 10 generations through head progeny row back-and-forth method.
Biomaterial PE106-11, the sw3016-4 that the present invention relates to are all not open in the literature, and above-mentioned biomaterial all has preservation at applicant place, and applicant ensures to provide to the public in 20 years from present patent application day.
Described Secure isolation, adopts time isolation or space isolation, adopts the sowing time in time insulation request production of hybrid seeds district will phase more than 30 day wrong with other corn; Other corn is not planted for more than 500 meters around employing insulation request production of hybrid seeds district, space.
Described sowing is adjusted to: father, the maternal sowing same period;
Described suitable row ratio is: father, maternal row, than adopting 1:4, plant male parent around;
Described roguing is: adopt in seedling stage, shooting stage, take out male early stage and all pull out not meeting the hybrid strain of parent's characteristic feature characteristic, special-shaped strain, prosperous long strain, diseased plant, lopsided strain and weak strain, stay the typical seedling of neat and consistent.
Described maternal emasculation, roots out male parent: adopt and take off luxuriant emasculating method in advance, thoroughly extracts maternal tassel, after the female parent pollination in production of hybrid seeds district terminates, male parent is all rooted out;
The producing method for seed in described sweet corn hybrid Zhejiang sweet 11, specifically comprises the following steps:
(1) ensure Secure isolation: adopt time isolation or space isolation, adopt the sowing time in time insulation request production of hybrid seeds district will phase more than 30 day wrong with other corn; Other corn is not planted for more than 500 meters around employing insulation request production of hybrid seeds district, space;
(2) sowing regulates: PE106-11 is maternal, and sw3016-4 is male parent, and the same period is sowed; Within 3-5 days, add after sowing the 1st phase male parent and broadcast the 2nd phase male parent; Notice that male parent will avoid high temperature, control tassel is degenerated;
(3) be suitable for row ratio: father, maternal ratio of going adopt 1:4, i.e. every 4 row maternal interval kind 1 row male parent, maternal reservation 5000 plants/acre, male parent retains 1250 plants/acre, and its per mu yield is more than 100 kilograms, and high yield field can reach 150 kilograms;
(4) roguing: adopt in seedling stage, shooting stage, take out male early stage and all pull out not meeting the hybrid strain of parent's characteristic feature characteristic, special-shaped strain, prosperous long strain, diseased plant, lopsided strain and weak strain, stay the typical seedling of neat and consistent;
(5) maternal emasculation, roots out male parent: maternal emasculation is the key link of production of hybrid seeds work, must adopt and take off luxuriant emasculating method in advance, accomplishes thorough, clean; After the female parent pollination in production of hybrid seeds district terminates, male parent is all rooted out, is conducive to ventilation and penetrating light, improve output, prevent from mixing, ensure the quality of products;
(6) extermination of disease and insect pest: seedling stage waters with phoxim emulsifiable concentrate every mu 150 milliliters of 2000 times of liquid and executes control soil insect, the middle and later periods adopts biopesticide such as BT emulsion or chemical agent 5% Frontline to fill with heart control of maize snout moth's larva and aphid;
(7) gather in the crops, airing keeping: in the shrivelled rear results of maternal seed dehydration, after results, airing in time or oven dry, make seed moisture content be down to less than 13%, obtains sweet corn hybrid Zhejiang sweet 11 in good time.
The present invention utilizes self bred inbred line PE106-11 for female parent, self bred inbred line sw3016-4 is the feature in the sweet corn hybrid Zhejiang sweet 11 of paternal hybrid preparation: 85.8 days breeding times (emerging to gathering), than contrasting Chaotian No.4 long 2.6 days, plant height 212.1 centimetres, Ear height 92.7 centimetres, dual spike rate 7.25%, empty stalk rate 0.8%, lodging rate 6.1%, the rate of falling folding 0.9%.Spike length 19.7 centimetres, thick 4.8 centimetres of fringe, long 1.7 centimetres of bald point, tassel row number 14.1 row, several 36.7 of row grain, seed is yellowish-white alternate, fresh thousand kernel weight 325.6 grams, seed-producing rate 69.3%, clean fringe rate 71.5%, spike weight 262.2 grams.Quality detects through Ministry of Agriculture's rice and quality of item supervision and inspection center, sugar content 8.6%.Organoleptic quality, cooking quality comprehensive grading 84.0 points, and contrasts quite.Through the qualification of Dongyang corn research institute disease and insect resistance, high resistance stem rot, feel large and small pinta, high sense corn borer.
The feature of maternal PE106-11: seedling leaf sheath is green, and leaf green, seedling gesture is strong.Plant type is compact, plant height 130 centimetres, 45 centimetres, fringe position, the strain number of blade 14.Filigree is green, and flower pesticide is yellow, and clever shell is green.Fruit ear cartridge type, in fringe handle, in bract, spike length 10 centimetres, thick 4 centimetres of fringe, tassel row number 12-14 is capable, and cob white, seed is yellow.
The feature of male parent sw3016-4: seedling leaf sheath is green, and leaf green, plant type is open and flat, plant height 170 centimetres, 65 centimetres, fringe position, the strain number of blade 16.Filigree is green, and flower pesticide is yellow, and clever shell is green.Fruit ear cartridge type, fringe handle is long, and in bract, spike length 14.8 centimetres, thick 3.6 centimetres of fringe, tassel row number 10-12 is capable, cob white, grain white.
The present invention has following advantage and effect relative to prior art:
1. output is high:
In the variety comparative test that spring in 2011 carries out in Dongyang, Zhejiang Province corn institute base, average fresh fringe amounts to per mu yield 1031.0 kilograms, than contrast Chaotian No.4 volume increase 14.5%.Autumn in 2011 carries out great Qu comparative trial, average yield per mu 955.2 kilograms, than contrast Chaotian No.4 volume increase 15.6%.Within 2012, participate in Zhejiang Province's Sweet Corn Regional Trial: average fresh fringe per mu yield 1035.8 kilograms, than contrast Chaotian No.4 volume increase 16.5%.Within 2013, participate in Zhejiang Province's Sweet Corn Regional Trial, average fresh fringe per mu yield 772.2 kilograms, than contrast Chaotian No.4 volume increase 10.2%.The average fresh fringe per mu yield 904.0 kilograms of 2012-2013, Liang Nian Zhejiang Province Sweet Corn Regional Trial, than contrast Chaotian No.4 volume increase 13.4%.Zhejiang Province's Sweet corn variety production test in 2014, average fresh fringe per mu yield 856.1 kilograms, than contrast Chaotian No.4 volume increase 10.2%.
2. best in quality:
Outward appearance commodity is good, organoleptic quality, cooking quality comprehensive grading 84.0 points, with to contrast Chaotian No.4 suitable.
3. resistance: high resistance stem rot, lodging resistance is good.
4. wide adaptability: be adapted at the province plantations such as river, Zhejiang, Shanghai, Guangdong, Guangxi.
Accompanying drawing explanation
Fig. 1 is sweet corn hybrid seeding family tree of the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment 1: the concrete Breeding Process in sweet corn hybrid Zhejiang sweet 11 of the present invention
Dongyang, the Zhe Tian11Shi Zhejiang Province corn research institute autumn in 2010 with self bred inbred line PE106-11 for female parent, with self bred inbred line sw3016-4 for paternal hybrid assembly be bred as.
Wherein said self bred inbred line PE106-11 obtains through inbreeding of more generation after the sweet corn system 05cPE02 of low generation (described 05cPE02 is that an external commodity crossbreed introduces 2 generations of rear selfing, is numbered 05cPE02) and China treasure hybridization of the Chinese Academy of Agricultural Sciences's introducing.Winter in 2006 utilizes 05cPE02 and Hua Zhen to hybridize assembly triple hybrid, spring sowing in 2007 is planted triple hybrid and is carried out combination qualification and selfing 2 fruit ear S0, plantation 2 head progeny rows after autumn in 2007 mixing threshing, roguing selfing and S1, winter in 2007 plants 15 head progeny rows, roguing selfing S2, eliminates 3 head progeny rows before results, carry out ear selection during species test, each head progeny row retains 1-8 fruit ear respectively.30 row are planted in spring sowing in 2008, and wherein 8 head progeny rows of S2 (10) all show better, pay close attention to, and continue selfing and S3.Autumn in 2008 plants 20 row by head progeny row, selfing and S4 to S3 (10-1), S3 (10-4), S3 (10-6).Winter in 2008 plants 12 row altogether to S4 (10-1) and S4 (10-6), and the blue 158-6 of inbred line of sweet corn is measured, selfing simultaneously and S5.Spring in 2009 continues plantation 12 head progeny rows, selfing and S6.Autumn in 2009 is measured result according to last year, and S6 (10-6) point of head progeny row plants 15 row, selfing and S7.Winter in 2009 selects the 11st head progeny row to be extensively measured, and a large amount of selfing and S8.Spring in 2010 mixes powder and expands numerous, names as PE106-11.This inbred line robust plant, cob is comparatively hard, and closely, quality is better in seed arrangement.
Self bred inbred line sw3016-4 is from the white sweet glutinous No. 1 white inbred line of sweet corn obtained through inbreeding of more generation through head progeny row back-and-forth method.Winter selfing in 2006 1 fruit ear and S0, spring sowing in 2007 plants 1 row, selfing 10 strain and S1, and 10 head progeny rows are planted in autumn planting in 2007, roguing selfing and S2.Winter in 2007 plants 20 head progeny rows, and mixed powder selfing is in the ranks S3, hybridizes simultaneously, be waxy corn seed completely, identify S2 (3), S2 (7) for sw double recessive inbred line of isozygotying according to hybrid combination with Suyunuo No.1.Spring in 2008 plants 20 row by head progeny row, single file roguing selfing and S4 the offspring of S2 (3), S2 (7).Offspring's 10 head progeny rows of S4 (3-0) are planted in autumn planting in 2008, are measured, roguing selfing simultaneously and S5.Winter in 2008 plants 12 row, and wherein S5 (3-0) the 1st head progeny row performance better, pays close attention to, roguing selfing simultaneously and S6.2009 spring S6 (3-0-1) plant 8 head progeny rows, be measured respectively, simultaneously roguing selfing and S7, the autumn in 2009 continues plantation 8 head progeny rows, and mixed powder selfing and S8, according to being measured, result S7 (3-0-1-6) coordinate force is higher.2009 winter S8 (3-0-1-6) plant 10 head progeny rows, roguing selfing and S9.Spring in 2010 is chosen the 4th head progeny row and is extensively measured, and a large amount of selfing and S10, the autumn in 2010 mixes powder and expands numerous, is measured in a large number and names as sw3016-4.It is high that this inbred line has general combining ability, and pollen amount is large.
1), output
Within 2012, participate in Zhejiang Province's Sweet Corn Regional Trial: 6 average fresh fringe per mu yields 1035.8 kilograms, than contrast Chaotian No.4 volume increase 16.5%.Within 2013, participate in Zhejiang Province's Sweet Corn Regional Trial, 7 average fresh fringe per mu yields 772.2 kilograms, than contrast Chaotian No.4 volume increase 10.2%.Within 2014, participate in Zhejiang Province's Sweet corn variety production test, 6 average fresh fringe per mu yields 856.1 kilograms, than contrast Chaotian No.4 volume increase 10.2%.Output is in table 1, table 2 and table 3.
The sweet 11 yield result units in table 1.2012 year Sweet Corn Regional Trial Zhejiang, Zhejiang Province: kilogram
| Hold examination place | Per mu yield | Contrast Chaotian No.4 output | Than CK ± |
| Rivers and mountains | 860.0 | 717.8 | 19.8 |
| Academy of agricultural sciences | 1187.8 | 927.8 | 28.0 |
| Shengzhou | 1122.2 | 1036.7 | 8.3 |
| Fairy house | 1144.4 | 1024.4 | 11.7 |
| Chunan | 1010.8 | 816.2 | 23.8 |
| Ninghai | 889.8 | 813.1 | 9.4 |
| Mean value | 1035.8 | 889.3 | 16.5 |
The sweet 11 yield result units in table 2.2013 year Sweet Corn Regional Trial Zhejiang, Zhejiang Province: kilogram
| Hold examination place | Per mu yield | Contrast Chaotian No.4 output | Than CK ± |
| Chunan | 735.2 | 624.4 | 17.7 |
| Dongyang | 797.8 | 667.8 | 19.5 |
| Rivers and mountains | 778.9 | 738.9 | 5.4 |
| Ninghai | 522.3 | 542.8 | -3.8 |
| Academy of agricultural sciences | 597.8 | 612.2 | -2.4 |
| Shengzhou | 820 | 767.8 | 6.8 |
| Wenzhou | 1065 | 876.1 | 21.6 |
| Mean value | 860.6 | 777.1 | 10.7 |
The sweet 11 yield result units in table 3.2014 year sweet corn production test Zhejiang, Zhejiang Province: kilogram
| Hold examination place | Per mu yield | Contrast Chaotian No.4 output | Than CK ± |
| Dongyang | 882.6 | 735.2 | 20.0 |
| Rivers and mountains | 897.8 | 847.9 | 5.9 |
| Academy of agricultural sciences | 696.6 | 657.5 | 5.9 |
| Shengzhou | 1020.7 | 998.7 | 2.2 |
| Wenzhou | 960.9 | 785.4 | 22.3 |
| Fairy house | 678.0 | 637.3 | 6.4 |
| Mean value | 856.1 | 777.0 | 10.2 |
2): disease and insect resistance
2012 through the qualification of Dongyang, Zhejiang Province corn research institute disease and insect resistance: high resistance stem rot, in anti-corn borer, sense leaf blight, high sense helminthosporium maydis.2013 through the disease and insect resistance qualification of Dongyang, Zhejiang Province corn research institute: high resistance stem rot, anti-helminthosporium maydis, middle Resistance To Helminthosporium Turcicum, high sense corn borer.Disease and insect resistance qualification result is in table 4 and table 5.
Table 4.2012 year Dongyang, Zhejiang Province corn research institute disease and insect resistance qualification result:
Table 5.2013 year Dongyang, Zhejiang Province corn research institute disease and insect resistance qualification result:
Embodiment 2: the seeding technique in sweet corn hybrid Zhejiang sweet 11 of the present invention
(1) ensure Secure isolation: adopt time isolation or space isolation, adopt the sowing time in time insulation request production of hybrid seeds district will phase more than 30 day wrong with other corn; Other corn is not planted for more than 500 meters around employing insulation request production of hybrid seeds district, space;
(2) sowing regulates: PE106-11 is maternal, and sw3016-4 is male parent, and the same period is sowed; Within 3-5 days, add after sowing the 1st phase male parent and broadcast the 2nd phase male parent; Notice that male parent will avoid high temperature, control tassel is degenerated;
(3) be suitable for row ratio: father, maternal ratio of going adopt 1:4, i.e. every 4 row maternal interval kind 1 row male parent, maternal reservation 5000 plants/acre, male parent retains 1250 plants/acre, and its per mu yield is more than 100 kilograms, and high yield field can reach 150 kilograms;
(4) roguing: adopt in seedling stage, shooting stage, take out male early stage and all pull out not meeting the hybrid strain of parent's characteristic feature characteristic, special-shaped strain, prosperous long strain, diseased plant, lopsided strain and weak strain, stay the typical seedling of neat and consistent;
(5) maternal emasculation, roots out male parent: maternal emasculation is the key link of production of hybrid seeds work, must adopt and take off luxuriant emasculating method in advance, accomplishes thorough, clean; After the female parent pollination in production of hybrid seeds district terminates, male parent is all rooted out, is conducive to ventilation and penetrating light, improve output, prevent from mixing, ensure the quality of products;
(6) extermination of disease and insect pest: seedling stage waters with phoxim emulsifiable concentrate every mu 150 milliliters of 2000 times of liquid and executes control soil insect, the middle and later periods adopts biopesticide such as BT emulsion or chemical agent 5% Frontline to fill with heart control of maize snout moth's larva and aphid;
(7) gather in the crops, airing keeping: in the shrivelled rear results of maternal seed dehydration, after results, airing in time or oven dry, make seed moisture content be down to less than 13%, obtains sweet corn hybrid Zhejiang sweet 11 in good time.
Embodiment 3: the culture technique in sweet corn hybrid Zhejiang sweet 11 of the present invention
1) spring sowing district in Zhejiang is generally late March to early and middle ten days in April, and autumn corn Suitable Sowing Period is mid or late July.Should feeding block seedlings raising be adopted, generally at 2-3 leaf phase transplant planting, emphasize transplantation with soil, be beneficial to the growth of root system.
2) be advisable for planting density 3000-3300 plant/acre, note density domination, will earth up in conjunction with intertill and clean tillage simultaneously.
3) rich water quality management: this kind happiness rich water, seedling stage is healthy and strong, should strengthen the rich water quality management in early stage, early final singling, early field planting; Method that fertilization mode generally adopts " topdressing at different stages ": mu with about pure N:16 kilogram, potassium oxide (K
2o) 14kg, phosphorus pentoxide (P
2o
5) 6kg.Before corn 7 ~ 8 leaves, generally apply 40 ~ 50% of total fertile amount, apply 50 ~ 60% of total fertilizer amount in the corn typhon phase.
4) timely collecting: gather latter stage at milking maturity, sow in spring 18d ~ 22d after weaving silk, and autumn sowing is 20d ~ 25d after weaving silk, and should accomplish to gather in conjunction with outward appearance in batches.
Above-described embodiment is the present invention's preferably embodiment; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (9)
1. the producing method for seed in a sweet corn hybrid Zhejiang sweet 11, comprise inbred line breeding, Secure isolation, date of seeding, regulates, be suitable for row ratio, roguing, maternal emasculation, roots out male parent, in good time results, it is characterized in that: utilize self bred inbred line PE106-11 for female parent, self bred inbred line sw3016-4 is male parent, preparation sweet corn hybrid.
2. the producing method for seed in sweet corn hybrid Zhejiang sweet 11 according to claim 1, is characterized in that: described self bred inbred line PE106-11 is that after low generation system 05cPE02 and Hua Zhen of sweet corn introduced from the Chinese Academy of Agricultural Sciences is hybridized, through 8 generations, selfing obtains.
3. the producing method for seed in sweet corn hybrid Zhejiang sweet 11 according to claim 1, is characterized in that: described self bred inbred line sw3016-4 is from the white sweet glutinous No. 1 white inbred line of sweet corn obtained through the selfing of 10 generations through head progeny row back-and-forth method.
4. the producing method for seed in sweet corn hybrid Zhejiang sweet 11 according to claim 1, is characterized in that: described Secure isolation, adopts time isolation or space isolation, adopts the sowing time in time insulation request production of hybrid seeds district will phase more than 30 day wrong with other corn; Other corn is not planted for more than 500 meters around employing insulation request production of hybrid seeds district, space.
5. the producing method for seed in sweet corn hybrid Zhejiang sweet 11 according to claim 1, is characterized in that: described sowing is adjusted to: father, the maternal sowing same period.
6. the producing method for seed in sweet corn hybrid Zhejiang sweet 11 according to claim 1, is characterized in that: described suitable row ratio is: father, maternal row, than adopting 1:4, plant male parent around.
7. the producing method for seed in sweet corn hybrid Zhejiang sweet 11 according to claim 1, it is characterized in that: described roguing is: adopt in seedling stage, shooting stage, take out male early stage and all pull out not meeting the hybrid strain of parent's characteristic feature characteristic, special-shaped strain, prosperous long strain, diseased plant, lopsided strain and weak strain, stay the typical seedling of neat and consistent.
8. the producing method for seed in sweet corn hybrid Zhejiang sweet 11 according to claim 1, it is characterized in that: described maternal emasculation, root out male parent: adopt and take off luxuriant emasculating method in advance, thoroughly extract maternal tassel, after the female parent pollination in production of hybrid seeds district terminates, male parent is all rooted out.
9. the producing method for seed in sweet corn hybrid Zhejiang sweet 11 according to claim 1, is characterized in that:
Specifically comprise the following steps:
(1) ensure Secure isolation: adopt time isolation or space isolation, adopt the sowing time in time insulation request production of hybrid seeds district will phase more than 30 day wrong with other corn; Other corn is not planted for more than 500 meters around employing insulation request production of hybrid seeds district, space;
(2) sowing regulates: PE106-11 is maternal, and sw3016-4 is male parent, and the same period is sowed; Within 3-5 days, add after sowing the 1st phase male parent and broadcast the 2nd phase male parent; Notice that male parent will avoid high temperature, control tassel is degenerated;
(3) be suitable for row ratio: father, maternal ratio of going adopt 1:4, i.e. every 4 row maternal interval kind 1 row male parent, maternal reservation 5000 plants/acre, male parent retains 1250 plants/acre, and its per mu yield is more than 100 kilograms, and high yield field can reach 150 kilograms;
(4) roguing: adopt in seedling stage, shooting stage, take out male early stage and all pull out not meeting the hybrid strain of parent's characteristic feature characteristic, special-shaped strain, prosperous long strain, diseased plant, lopsided strain and weak strain, stay the typical seedling of neat and consistent;
(5) maternal emasculation, roots out male parent: maternal emasculation is the key link of production of hybrid seeds work, must adopt and take off luxuriant emasculating method in advance, accomplishes thorough, clean; After the female parent pollination in production of hybrid seeds district terminates, male parent is all rooted out;
(6) extermination of disease and insect pest: seedling stage waters with phoxim emulsifiable concentrate every mu 150 milliliters of 2000 times of liquid and executes control soil insect, the middle and later periods adopts biopesticide BT emulsion or chemical agent 5% Frontline to fill with heart control of maize snout moth's larva and aphid;
(7) gather in the crops, airing keeping: in the shrivelled rear results of maternal seed dehydration, after results, airing in time or oven dry, make seed moisture content be down to less than 13%, obtains sweet corn hybrid Zhejiang sweet 11 in good time.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106171965A (en) * | 2016-08-25 | 2016-12-07 | 通化市农业科学研究院 | A kind of super many tassel row numbers Maize DH Lines leads to the selection of 15D969 |
| CN107637515A (en) * | 2017-11-07 | 2018-01-30 | 浙江省东阳玉米研究所 | A kind of corn cross breeding method of red sweet tea 1718 |
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2015
- 2015-06-23 CN CN201510354821.XA patent/CN104996293A/en active Pending
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| CN106171965A (en) * | 2016-08-25 | 2016-12-07 | 通化市农业科学研究院 | A kind of super many tassel row numbers Maize DH Lines leads to the selection of 15D969 |
| CN107637515A (en) * | 2017-11-07 | 2018-01-30 | 浙江省东阳玉米研究所 | A kind of corn cross breeding method of red sweet tea 1718 |
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Application publication date: 20151028 |