CN111492970A - Method for cultivating high-yield high-quality multi-resistance new rice variety - Google Patents
Method for cultivating high-yield high-quality multi-resistance new rice variety Download PDFInfo
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- CN111492970A CN111492970A CN201910092421.4A CN201910092421A CN111492970A CN 111492970 A CN111492970 A CN 111492970A CN 201910092421 A CN201910092421 A CN 201910092421A CN 111492970 A CN111492970 A CN 111492970A
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01H—NEW PLANTS OR NON-TRANSGENIC PROCESSES FOR OBTAINING THEM; PLANT REPRODUCTION BY TISSUE CULTURE TECHNIQUES
- A01H1/00—Processes for modifying genotypes ; Plants characterised by associated natural traits
- A01H1/02—Methods or apparatus for hybridisation; Artificial pollination ; Fertility
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01H—NEW PLANTS OR NON-TRANSGENIC PROCESSES FOR OBTAINING THEM; PLANT REPRODUCTION BY TISSUE CULTURE TECHNIQUES
- A01H1/00—Processes for modifying genotypes ; Plants characterised by associated natural traits
- A01H1/04—Processes of selection involving genotypic or phenotypic markers; Methods of using phenotypic markers for selection
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Abstract
The invention discloses a method for cultivating a new high-yield high-quality multi-resistance rice variety, which comprises the following steps of S1, parent selection, S2, pedigree breeding, S3, crossbreeding, S4, single-parent planting, S5, proper thin planting, S6 and selection comparison. The method for cultivating the new high-yield high-quality multi-resistance rice variety comprises the steps of hybridizing SulJaponica No. 4 and Liaojie No. 2 serving as parents, selecting a high-quality and wide-adaptability inbred line from the hybridized seeds through a pedigree breeding method, hybridizing the inbred line with Longjing No. 21 inbred line again, achieving high yield, high quality and good taste, performing secondary hybridization on the seeds prepared by secondary hybridization and a drought line I to increase drought resistance, and finally cultivating the new high-yield high-quality multi-resistance rice variety through planting selection.
Description
Technical Field
The invention belongs to the technical field of rice cultivation, and particularly relates to a method for cultivating a new high-yield high-quality multi-resistance rice variety.
Background
With the further increase of rice marketization degree, rice production is changed from a single high-yield type to a new stage with high yield and high quality. As the traditional rice products have the phenomenon that the supply is larger than the demand, the price of rice is continuously lowered, so that the yield of rice farmers is increased without increasing the effect, the economic effect in rural areas is reduced, and the result of 'rice farmers are hurt by crops due to base rice'. Against the current market development and rice production conditions, rice producers are eager to select high-yield and high-quality rice varieties, so that the market competitiveness is enhanced, the rice price is improved, and the production effect is increased.
Because of the influence of the genetic rule effect of rice, the general yield of the new rice variety cultured under the conventional breeding condition at present is in a contradictory relation with the rice quality and the resistance, namely the high-yield new rice variety is slightly poor in general rice quality, and the high-quality rice variety is slightly low in disease resistance and yield. Therefore, it is necessary to develop a new high-yield and high-quality multi-resistant rice variety to solve the problem.
Disclosure of Invention
The invention aims to provide a method for cultivating a new high-yield high-quality multi-resistance rice variety so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a method for cultivating a new high-yield high-quality multi-resistance rice variety comprises the following specific steps:
s1, parent selection: selecting SulIJING No. 4 as female parent and Liaoliu salt No. 2 as male parent, performing single ear planting, hybridizing in flowering period by adopting 'rice sexual hybridization technology', and preparing first generation hybrid seed after combination and optimization;
s2, pedigree breeding: selecting the first generation hybrid seeds in the step S1 through recurrent selection to breed a high-adaptability and high-quality inbred line, hybridizing the inbred line with the high-quality and high-yield Longjing 21 inbred line, and selecting a high-yield, disease-resistant and high-quality inbred line as a male parent from the offspring by using a pedigree breeding method;
s3, cross breeding: taking the high-yield, disease-resistant and high-quality selfed line obtained in the step S2 as a male parent, taking Zhonghan No. one as a female parent to perform secondary hybridization, and obtaining second generation hybrid seeds after optimization;
s4, planting in single copy: sowing the second generation hybrid seeds obtained in the step S2, planting the seeds individually, recording the yield of each plant, the total grain number of each ear, the setting percentage and the thousand-grain weight, selecting a combination with obvious ear advantages and good complementarity, harvesting 35-50 seeds from each ear on the plants with high yield, large total grain number of each ear, high setting percentage and high thousand-grain weight, collecting 5000-6500 seeds in total, and selecting the seeds to obtain a new generation of seeds;
s5, moderate thin planting: planting 3-5 seedlings in each hole of the new generation of seeds with the row spacing of 20-30 cm and the hole spacing of 15-20 cm in the step S4, ensuring that no hole is leaked and no seedling is lacked and ensuring the planting quality, and selecting different fertilizer conditions for planting during the planting period to obtain the optimal fertilizer planting conditions;
s6, selecting and comparing: when the rice is mature, the high yield of each acupoint is compared, then the comparison is carried out again in the acupoints with good yield, and high-quality single plants with obvious ear advantages and wide adaptability are selected to obtain a new high-yield, high-quality and multi-resistant rice variety.
Preferably, the seeds selected in the steps S1, S2 and S3 are selected by a fine separator or manual grain separation, and fine screened to ensure the quality of the seeds without disease grains, broken grains, insect eating grains and miscellaneous grains.
Preferably, the Longjing 21 inbred line in S2 is bred into an inbred line with wide adaptability and high quality through recurrent selection by using a pedigree breeding method for hybridization.
Preferably, in the step S5, three fertilizers, namely a conventional nitrogen-phosphorus-potassium compound fertilizer, an organic fertilizer and a microbial fertilizer, are respectively selected for single transplanting of rice.
Compared with the prior art, the invention has the beneficial effects that: the method for cultivating the new high-yield high-quality multi-resistance rice variety comprises the steps of hybridizing Suljing No. 4 and Liaojie No. 2 serving as parents, hybridizing the obtained hybrid seeds with a high-quality and wide-adaptability inbred line and a Longjing No. 21 inbred line again by a pedigree breeding method, hybridizing the obtained hybrid seeds with a Zhonghai No. one for the second time to increase drought resistance, and cultivating the new high-yield high-quality multi-resistance rice variety by planting selection.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example one
The invention provides a method for cultivating a new high-yield high-quality multi-resistance rice variety, which comprises the following specific steps:
s1, parent selection: selecting SulIJING No. 4 as female parent and Liaoliu salt No. 2 as male parent, performing single ear planting, hybridizing in flowering period by adopting 'rice sexual hybridization technology', and preparing first generation hybrid seed after combination and optimization;
s2, pedigree breeding: selecting the first generation hybrid seeds in the step S1 through recurrent selection to breed a high-adaptability and high-quality inbred line, hybridizing the inbred line with the high-quality and high-yield Longjing 21 inbred line, and selecting a high-yield, disease-resistant and high-quality inbred line as a male parent from the offspring by using a pedigree breeding method;
s3, cross breeding: taking the high-yield, disease-resistant and high-quality selfed line obtained in the step S2 as a male parent, taking Zhonghan No. one as a female parent to perform secondary hybridization, and obtaining second generation hybrid seeds after optimization;
s4, planting in single copy: sowing the second generation hybrid seeds obtained in the step S2, planting the seeds individually, recording the yield of each plant, the total grain number of each ear, the setting percentage and the thousand-grain weight, selecting a combination with obvious ear advantages and good complementarity, harvesting 45 seeds from each ear on the plants with high yield, large total grain number of each ear, high setting percentage and high thousand-grain weight, collecting 5500 seeds in total, and selecting seeds to obtain new generation seeds;
s5, moderate thin planting: planting 5 seedlings in each hole of the new generation of seeds with the row spacing of 20 cm and the hole spacing of 15 cm in the step S4, ensuring that no hole is leaked and no seedling is lacked and ensuring the planting quality, and selecting different fertilizer conditions for planting during the planting period to obtain the optimal fertilizer planting conditions;
s6, selecting and comparing: during maturation, the high yield of each acupoint is compared, then the comparison is carried out again in the acupoints with good yield, and high-quality single plants with obvious ear advantages and wide adaptability are selected to obtain a new high-yield, high-quality and multi-resistant rice variety
Specifically, the seeds selected in the steps S1, S2 and S3 are selected by a fine separator or manual grain separation, and fine screened to ensure that the seeds have no disease grains, broken grains, insect eating grains and miscellaneous grains, thereby ensuring the seed quality.
Specifically, the Longjing 21 inbred line in S2 is bred into a high-quality inbred line with wide adaptability by a pedigree breeding method through recurrent selection, and the inbred line is hybridized for use.
Specifically, in the step S5, three fertilizers, namely a conventional nitrogen-phosphorus-potassium compound fertilizer, an organic fertilizer and a microbial fertilizer, are respectively selected for single-parent rice transplanting.
Example two
The invention provides a method for cultivating a new high-yield high-quality multi-resistance rice variety, which comprises the following specific steps:
s1, parent selection: selecting Liaoliu salt No. 2 as a female parent and Suizhijing No. 4 as a male parent, performing single-spike planting, hybridizing in the flowering period by adopting a 'rice sexual hybridization technology', and preparing first-generation hybrid seeds after combination and optimization;
s2, pedigree breeding: selecting the first generation hybrid seeds in the step S1 through recurrent selection to breed a high-adaptability and high-quality inbred line, hybridizing the inbred line with the high-quality and high-yield Longjing 21 inbred line, and selecting a high-yield, disease-resistant and high-quality inbred line as a male parent from the offspring by using a pedigree breeding method;
s3, cross breeding: taking the high-yield, disease-resistant and high-quality selfing line obtained in the step S2 as a female parent, taking the Zhonghan I as a male parent to perform secondary hybridization, and obtaining second generation hybrid seeds after optimization;
s4, planting in single copy: sowing the second generation hybrid seeds obtained in the step S2, planting the seeds individually, recording the yield of each plant, the total grain number of each ear, the setting percentage and the thousand-grain weight, selecting a combination with obvious ear advantages and good complementarity, harvesting 50 seeds from each ear on the plants with high yield, large total grain number of each ear, high setting percentage and high thousand-grain weight, collecting 6000 seeds in total, and selecting new generation seeds;
s5, moderate thin planting: planting 4 seedlings in each hole with the row spacing of 25 cm and the hole spacing of 20 cm of the new generation of seeds in the step S4, ensuring that no hole is leaked and no seedling is lacked and ensuring the planting quality, and selecting different fertilizer conditions for planting during the planting period to obtain the optimal fertilizer planting conditions;
s6, selecting and comparing: when the rice is mature, the high yield of each acupoint is compared, then the comparison is carried out again in the acupoints with good yield, and high-quality single plants with obvious ear advantages and wide adaptability are selected to obtain a new high-yield, high-quality and multi-resistant rice variety.
Specifically, the seeds selected in the steps S1, S2 and S3 are selected by a fine separator or manual grain separation, and fine screened to ensure that the seeds have no disease grains, broken grains, insect eating grains and miscellaneous grains, thereby ensuring the seed quality.
Specifically, the Longjing 21 inbred line in S2 is bred into a high-quality inbred line with wide adaptability by a pedigree breeding method through recurrent selection, and the inbred line is hybridized for use.
Specifically, in the step S5, three fertilizers, namely a conventional nitrogen-phosphorus-potassium compound fertilizer, an organic fertilizer and a microbial fertilizer, are respectively selected for single-parent rice transplanting.
The method comprises the steps of hybridizing SulJaponica No. 4 and Liaojie No. 2 as parents, selecting a high-quality and wide-adaptability inbred line from the seeds obtained by hybridization by a pedigree breeding method, hybridizing the inbred line with Longjing No. 21 inbred line again, increasing drought resistance, and finally breeding a new high-yield and high-quality multi-resistance rice variety by planting and selecting.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. A method for cultivating a new high-yield high-quality multi-resistance rice variety is characterized by comprising the following specific steps:
s1, parent selection: selecting SulIJING No. 4 as female parent and Liaoliu salt No. 2 as male parent, performing single ear planting, hybridizing in flowering period by adopting 'rice sexual hybridization technology', and preparing first generation hybrid seed after combination and optimization;
s2, pedigree breeding: selecting the first generation hybrid seeds in the step S1 through recurrent selection to breed a high-adaptability and high-quality inbred line, hybridizing the inbred line with the high-quality and high-yield Longjing 21 inbred line, and selecting a high-yield, disease-resistant and high-quality inbred line as a male parent from the offspring by using a pedigree breeding method;
s3, cross breeding: taking the high-yield, disease-resistant and high-quality selfed line obtained in the step S2 as a male parent, taking Zhonghan No. one as a female parent to perform secondary hybridization, and obtaining second generation hybrid seeds after optimization;
s4, planting in single copy: sowing the second generation hybrid seeds obtained in the step S2, planting the seeds individually, recording the yield of each plant, the total grain number of each ear, the setting percentage and the thousand-grain weight, selecting a combination with obvious ear advantages and good complementarity, harvesting 35-50 seeds from each ear on the plants with high yield, large total grain number of each ear, high setting percentage and high thousand-grain weight, collecting 5000-6500 seeds in total, and selecting the seeds to obtain a new generation of seeds;
s5, moderate thin planting: planting 3-5 seedlings in each hole of the new generation of seeds with the row spacing of 20-30 cm and the hole spacing of 15-20 cm in the step S4, ensuring that no hole is leaked and no seedling is lacked and ensuring the planting quality, and selecting different fertilizer conditions for planting during the planting period to obtain the optimal fertilizer planting conditions;
s6, selecting and comparing: when the rice is mature, the high yield of each acupoint is compared, then the comparison is carried out again in the acupoints with good yield, and high-quality single plants with obvious ear advantages and wide adaptability are selected to obtain a new high-yield, high-quality and multi-resistant rice variety.
2. The method for breeding a new high-yield high-quality multi-resistance rice variety according to claim 1, wherein the method comprises the following steps: and (4) adopting a fine separator or manual grain separation to fine screen the seeds selected in the steps S1, S2 and S3, wherein the seeds are required to have no disease grains, broken grains, insect eating grains and miscellaneous grains, and the seed quality is ensured.
3. The method for breeding a new high-yield high-quality multi-resistance rice variety according to claim 1, wherein the method comprises the following steps: and the Longjing 21 inbred line in the S2 is bred into an inbred line with wide adaptability and high quality by a pedigree breeding method through recurrent selection for hybridization.
4. The method for breeding a new high-yield high-quality multi-resistance rice variety according to claim 1, wherein the method comprises the following steps: and in the step S5, conventional nitrogen-phosphorus-potassium compound fertilizers, organic fertilizers and microbial fertilizers are respectively selected for single-parent rice transplanting.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114931076A (en) * | 2022-06-28 | 2022-08-23 | 沭阳县诚信米业有限公司 | Method for planting new variety rice with high stress resistance of high-quality gene in biological industry |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114931076A (en) * | 2022-06-28 | 2022-08-23 | 沭阳县诚信米业有限公司 | Method for planting new variety rice with high stress resistance of high-quality gene in biological industry |
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Application publication date: 20200807 |