CN1206904C - Breeding process of rice variety group and varieties with excellent comprehensive character - Google Patents
Breeding process of rice variety group and varieties with excellent comprehensive character Download PDFInfo
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- CN1206904C CN1206904C CN 02152197 CN02152197A CN1206904C CN 1206904 C CN1206904 C CN 1206904C CN 02152197 CN02152197 CN 02152197 CN 02152197 A CN02152197 A CN 02152197A CN 1206904 C CN1206904 C CN 1206904C
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- hybridization
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Abstract
The present invention relates to a selecting and breeding method of a rice species group with excellent comprehensive characteristics. The present invention is characterized in that even number amount of seeds of rice with different target characteristics are paired and hybridized to respectively produce first generation seeds, and the first generation seeds are paired and hybridized to produce second generation seeds; moreover, the second generation seeds are paired and hybridized; subsequently, the produced hybrid group is bred for a plurality of generations in a self cross way under the condition of keeping stable characteristics. The method is suitable for rapidly and effectively selecting and breeding the rice species group with the excellent comprehensive characteristics.
Description
Described technical field
The present invention relates to the good population of the comprehensive proterties of a kind of paddy rice, the method for breed breeding.
Background technology
The mode of single-gene type seed selection kind is all adopted in the conventional choosing of paddy rice in the past, breeding, the difficulty that single-gene type surmounts another single-gene type is very big, be difficult to form in batches effectively and quickly the good kind of numerous comprehensive proterties, cause the conventional variety life cycle shorter and shorter, especially the resistance to disease can not be lasting, be difficult to obtain big breakthrough, more can not form comprehensive proterties and well can carry out the polygene type group that yielding ability is promoted.
The invention technology contents
For forming the good rice population of numerous comprehensive proterties the invention provides the good population selection of a kind of comprehensive proterties in batches apace, it is characterized in that: the even number rice paddy seed pairing hybridization that will have the various objectives proterties, with the first generation seed partly or entirely pairing in twos again that produces respectively, with the second generation seed partly or entirely pairing hybridization in twos again that produces, afterwards, the hybridization colony that is produced is carried out the property stability self propagated and count generation.The various objectives proterties is meant: have each variant DNA genetic character, for example: rice matter proterties, plant forms proterties, the susceptibility proterties at sunshine, disease and insect resistance proterties or the like.The seed that will have each variant DNA genetic character matches mutually to hybridize and forms first generation crossbreed, has the DNA heredity function proterties of his father's female parent in the first generation crossbreed respectively; With the hybridization in twos mutually of first generation crossbreed, at this moment, in consequent each third generation crossbreed, have the repertoire gene character of its second godfather, female parent concurrently again.With regard to third generation crossbreed colony, possessed all DNA heredity functional gene of all original parents.Embodied good DNA heredity function synthesized proterties on the whole.But third generation crossbreed proterties is also unstable, need be through one from being separated to stable process; Need that for this reason the hybridization colony that is produced is carried out the property stability self propagated and count generation, even each plant of colony self-pollination breeding number generation alone respectively.In this process, it is best certainly they to be carried out the bagging processing respectively, and still, workload is too big; Facts have proved, do not need bagging, make colony also can reach essentially identical effect in the coexistence naturally; Can adopt the conventional approach of removing, purifying by the worker that makes children to solve for a small amount of crossbreed of wherein causing, thereby can reach the purpose that makes the comprehensive proterties of colony tend towards stability by generation because of anemophily.Certainly,, can select for the laggard pedestrian worker of hybridization at each respectively, select the excellent plant of Part Traits and enter hybridization of future generation in order to reduce the workload problems of too that causes owing to colony is excessive.
Pairing hybridization in twos can be carried out more than the generation again.After the third generation, can also proceed the above hybridization of a generation as required, to improve the good inheritance of comprehensive proterties of plant.
Colony after stable being carried out the uniformity of breeding time and plant height hives off.After the comprehensive proterties of hybridization colony is stable, the uniformity of uniformity and plant height is that standard is hived off to colony with breeding time, the plant that respectively hives off that order is told all reaches same in the uniformity of breeding time uniformity and plant height, hiving off like this because all plant all have same breeding time and same plant height, therefore just can make yielding ability on the land for growing field crops promotes, above-mentionedly hive off that genetic type has nothing in common with each other on the individuality of plant, with regard to colony, the mutual complementation that this genotype is inequality makes the comprehensive more enhancing of merit of colony's integral body.For example: with regard to disease resistance, disease and different biological strains that the different genotype opposing is different reduce the selection of pathogen is pressed, and make disease resistance more lasting; With regard to rice matter, the difference that has proterties such as soft, hard, fragrant, sticking, look is respectively stablized colony of plant coexistence, then the direct natural production mixing rice (rice) that goes out to have prescription type best buy packaged rice effect just.
Quantity with even number rice paddy seed of various objectives proterties is 6 to 48.Greater than 48 parents (promptly 24 couples) then under the situation of full choosing the artificial amount of labour too big, less than 6 (3 pairs) DeGrain then.
From the hybridization population that obtains, select the good individual plant of comprehensive proterties to carry out the number generation breeding of property stability.If find that in colony a certain plant has tangible comprehensive advantage and specific function proterties, it can be selected the number generation breeding of carrying out property stability separately, select a new standardbred stock.
Selecting the good group of hill of comprehensive proterties in colony is that female parent is that male parent is hybridized with the kind with specific function proterties, and afterwards, the number that carries out stability again is for breeding.Can on the basis of good combination property, strengthen this kind specific function proterties like this.
Place specific geography or weather or ecotope to carry out natural selection the hybridization population that obtains.Help strengthening adaptability genetic character like this to this specific geography or weather or ecotope.
Embodiment
Embodiment one;
The reinforcement seed selection of high-quality and comprehensive proterties improved seeds: select 5 of high-grade rice kinds, in two softly account for, Guangdong China accounts for, Guangdong Thailand accounts for, sixteen account for (preceding 4 materials are the paddy rice improved variety of academy of agricultural sciences, Guangdong Province) and Lemont (this kind is the material of U.S.'s introduction); 4 of high yielding variety, richly shortly account for, Guangdong perfume (or spice) accounts for, (for the paddy rice improved variety of academy of agricultural sciences, Guangdong Province), seven osmanthus early, special Xian accounts for No. 13 (for the improved variety of Foshan institute of agricultural sciences); 3 in disease-resistant variety resists 578 more, resists 580 more, resists 583 (being Philippine's International Rice Research Institute's introduced variety) more.Above-mentioned kind is matched hybridization in twos:
Hybridization for the first time:
Rich short accounting for * resist 578 more; Lemont * in two soft accounting for;
Guangdong Thailand accounts for * and how anti-580; Guangdong China accounts for * sixteen accounts for;
Special Xian accounts for 13 * Guangdong perfume (or spice) and accounts for; Seven osmanthus early * how anti-583;
Hybridization for the second time:
(rich short accounting for * how anti-578) * (Lemont * in two soft accounting for); Annotate: obtain 50 seeds.
(Guangdong Thailand accounts for * how anti-580) * (Guangdong China account for * sixteen account for); Annotate: obtain 50 seeds.
(special Xian accounts for 13 * Guangdong perfume (or spice) and accounts for) * (seven osmanthus early * how anti-583); Annotate: obtain 50 seeds.
Hybridization for the third time:
[(rich short accounting for * how anti-578) * (Lemont * in two soft accounting for)] * [(Guangdong Thailand account for * how anti-580) * (Guangdong China account for * sixteen account for)] promptly: the special Xian of male parent 1+[(accounts for 13 * Guangdong perfume (or spice) and accounts for) * (seven osmanthus early * how anti-583)] promptly: male parent 2}.
Annotate: above-mentioned hybridization is female parent with the former all, and the latter is a male parent.
When hybridizing for the third time, the pollen of getting on each male parent (male parent 1, male parent 2) individual plant mixes, and then, to each maternal individual plant pollination, each hybridization individual plant obtains 4-5 grain seed.On 50 maternal individual plants of three hybridization, obtain 220 filial generations altogether; Later on each filial generation keeps a selfing individual plant in the generation afterwards, 6 generations of promptly stable selfing; Obtain stable hereditary basis population widely.At last, each individual plant kind of each filial generation becomes strain system, observes stability.Write down the breeding time and the plant height of each strain system.System merges into a population the strain of same breeding time and same plant height, under the unsettled situation of population, can also carry out conventional removal of impurities, until last stable and consistent.Select to obtain 3 populations altogether, JT1, JT2, JT3, their breeding time and plant height parameter are as follows respectively:
Kind of group number breeding time (my god) plant height cm
JT1 104 98
JT2 109 104
JT3 113 109
Embodiment 2
In embodiment one, finish hybridization for the second time and hybridize for the third time after producing 50 individual plants:
[(rich short accounting for * how anti-578) * (Lemont * in two soft accounting for)] * [(Guangdong Thailand account for * how anti-580) * (Guangdong China account for * sixteen account for)] promptly: the special Xian of male parent 1+[(accounts for 13 * Guangdong perfume (or spice) and accounts for) * (seven osmanthus early * how anti-583)] promptly: male parent 2}.
Before hybridization for the third time, female parent, male parent 1, male parent 2 are carried out the individual plant numbering of 1-50 respectively separately, then, the pollen of 2 male parents (male parent 1, male parent 2) individual plant that numbering is identical mixes, hybridize with each maternal individual plant of numbering again and with male parent, obtain 258 filial generations on 50 maternal individual plants altogether; Later on each filial generation keeps a selfing individual plant in the generation afterwards, 6 generations of promptly stable selfing; At last, each individual plant kind of each filial generation becomes strain system, observes stability.Write down the breeding time and the plant height of each strain system.System merges into a population the strain of same breeding time and same plant height.Selecting altogether to obtain 2 populations is JT4, JT5, and their breeding time and plant height parameter are as follows respectively:
Kind of group number breeding time (my god) plant height cm
JT4 100 110
JT5 98 102
Because above population is stable, original parent has the characteristic of the disease-resistant and high yielding variety of a plurality of high-qualitys, so this population has the characteristics of the disease-resistant and high yield of comprehensive good high-quality.And called after bulk variety.The bulk variety of its different growing can satisfy the needs in different ecological area.Owing to be the polygene type group of stable mixing, also have the multiple damage by disease and insect of opposing and postpone the disease variation, reduce the selection of pathogen is pressed, thereby reach more disease-resistant purpose.People can select the new parent of any number to hybridize plan as required.
Embodiment 3
The seed selection of the comprehensive merit kind of partial reinforment: in embodiment one, finish hybridization for the second time and hybridize for the third time after producing 50 individual plants:
[(rich short accounting for * how anti-578) * (Lemont * in two soft accounting for)] * [(Guangdong Thailand account for * how anti-580) * (Guangdong China account for * sixteen account for)].
Before hybridization for the third time, only select 2 population hybridization.To the individual plant numbering maternal, that male parent is carried out 1-50 respectively separately, then, the pollen of will numbering identical male parent individual plant and with male parent each maternal individual plant hybridization with numbering, obtain 200 of filial generations on each individual plant altogether; Later on each filial generation keeps a selfing individual plant in the generation afterwards, 6 generations of promptly stable selfing; At last, each individual plant kind of each filial generation becomes strain system, observes stability.Write down the breeding time and the plant height of each strain system.It is JT6 that the strain of same breeding time and same plant height system is merged into a population.Simultaneously therefrom select 1 individual plant to select breeding by system, the formation kind is JT7.JT6 and JT7 population are as follows:
Kind of group number breeding time (my god) plant height cm
JT6 99 105
JT7 108 110
Can suitably shorten breeding cycle like this, and accelerate the process of population, stable variety, workload also suitably reduces.But the population hereditary basis that JT6 forms is narrow, and what JT7 formed is pure line cultivar, and disease resistance may be more weaker than preceding 2 embodiment.
Embodiment 4:
Ecological zone adaptability is strengthened the seed selection of kind: with the stable selfed seed of embodiment 1 and 2, during 4 generations, kind is carried out 2 stable selfings in different ecotope again in Hubei in stable selfing; At last, each individual plant kind of each filial generation becomes strain system, observes stability.Write down the breeding time and the plant height of each strain system.System merges into a population the strain of same breeding time and same plant height, and selecting regional bulk variety is JT8, and its breeding time and plant height parameter are as follows:
Kind of group number breeding time (my god) plant height cm
JT8 102 98
Claims (6)
1. the selection of a rice population, it is characterized in that: the even number rice paddy seed pairing hybridization that will have the various objectives proterties, with the first generation seed pairing hybridization that produces respectively, the second generation seed that produces is matched hybridization again, afterwards, the hybridization colony that is produced is carried out the property stability self propagated and count generation.
2. population selection according to claim 1 is characterized in that: pairing hybridization can be carried out more than the generation.
3. population selection according to claim 1 is characterized in that: the colony after stable is carried out the uniformity of breeding time hive off.
4. population selection according to claim 1 is characterized in that: the uniformity of the colony after stable being carried out plant height is hived off.
5. population selection according to claim 1 is characterized in that: the quantity with even number rice paddy seed of various objectives proterties is 6 to 48.
6. the method for a seed selection kind from population is characterized in that: the individual plant of selecting to meet breeding objective from the hybridization population that obtains in accordance with the method for claim 1 carries out the number generation breeding of property stability.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02152197 CN1206904C (en) | 2002-12-11 | 2002-12-11 | Breeding process of rice variety group and varieties with excellent comprehensive character |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02152197 CN1206904C (en) | 2002-12-11 | 2002-12-11 | Breeding process of rice variety group and varieties with excellent comprehensive character |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1505924A CN1505924A (en) | 2004-06-23 |
| CN1206904C true CN1206904C (en) | 2005-06-22 |
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| CN 02152197 Expired - Fee Related CN1206904C (en) | 2002-12-11 | 2002-12-11 | Breeding process of rice variety group and varieties with excellent comprehensive character |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1938681A4 (en) | 2005-06-29 | 2008-12-10 | Li Xiaofang | A method for the formation of colony varieties of multi-genotype varieties and production of their seeds |
| CN105145333B (en) * | 2013-05-10 | 2017-11-14 | 李晓方 | It is commercialized population breeding method |
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