Method for screening high-quality hybrid rice combinations

A screening method, hybrid rice technology, applied in the direction of botanical equipment and methods, application, plant gene improvement, etc., can solve problems such as taking care of one thing and losing another, difficult high-quality breeding goals, etc., to achieve excellent plant and leaf traits, good fruiting, resistance good effect

Pending Publication Date: 2020-06-26
CHONGQING ACAD OF AGRI SCI
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Problems solved by technology

If the breeding is not handled well, it is easy to lose sight of the other, and it is difficult to truly achieve the g

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  • Method for screening high-quality hybrid rice combinations

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Embodiment 1

[0035] ①Using "a high-efficiency breeding method for two-line CMS (ZL201510918232.X)", bred "Yuxiang 7S" and "Yuxiang 8S" and other high-quality two-line CMS; Breeding methods of rice restorer lines (201810859961.6)" bred high-quality aroma-type restorer lines "Yuhui 2103", "Yuxianghui 4478", "Yuxianghui 868" and so on. Sow seeds in mid-to-late August at Hainan Yingzhou Southern Propagation Base, and use high-quality parents for incomplete diallell hybridization in early November.

[0036] ②The new combination was sown at the Yuxi Crop Experimental Station of Chongqing Academy of Agricultural Sciences in Yongchuan, Chongqing on March 8, and planted around April 15. Each combination was planted in 5 rows, with 12 litters in each row, and single seedlings were transplanted, with a planting size of 8. ×6 inches, Yuxiang 203, a high-quality nationally awarded second-grade high-quality rice variety, was used as a control. Cunnuo, a conventional variety of susceptible glutinous ric...

Embodiment 2

[0041] ① Screen high-quality aromatic CMS lines "Yuxiang 813A", "Yixiang 1A" and Luxiang 618A" and other high-quality three-line CMS lines; select rice blast-resistant and high-quality restorer lines "Yuhui 2103", "Yuxianghui 4478" and "Yuxianghui 868" and other good-scented and high-quality restorer lines with good blast resistance. They were sown in early September at the Southern Propagation Base in Yingzhou, Hainan, and incomplete cultivation was carried out in mid-November with the high-quality parents of the fragrant type. Diallel hybrid mating.

[0042] ②The new combination was sown at the Yuxi Crop Experimental Station of Chongqing Academy of Agricultural Sciences in Yongchuan, Chongqing on March 8, and planted around April 15. Each combination was planted in 5 rows, with 12 litters in each row, and single seedlings were transplanted, with a planting size of 8. ×6 inches, Yuxiang 203, a high-quality nationally awarded second-grade high-quality rice variety, was used as...

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Abstract

The invention provides a method for screening high-quality hybrid rice combinations and belongs to the technical field of rice breeding. According to the method, fragrant type high-quality parents aresubjected to incomplete diallel cross grouping, at high-temperature summer drought ecological selection pressure, Yuxiang 203 is adopted as a reference, a fragrant rice combination with excellent plant and leaf properties, good fecundity and good disease resistance can be screened, in addition, a combination of which the brown rice chalkiness and the chalky kernel percentage are prior to those ofthe reference is primarily screened through artificial husking, rice of the novel combination at a mature stage is finely processed, and a combination of which the head rice rate, the chalkiness, thee chalky kernel percentage and the transparency are prior to those of the reference is screened, so that high quality of the combination is ensured. By adopting the method, eating taste indexes of the refined rice are also screened, so that the obtained hybrid rice combination has the advantages of being good in appearance, good in taste and high in commodity rate, and high-quality breeding of hybrid rice in high-temperature summer drought regions can be achieved.

Description

technical field [0001] The invention relates to the technical field of rice breeding, in particular to a screening method for high-quality hybrid rice combinations. Background technique [0002] The industrial application of hybrid rice has promoted the second revolution in rice production and made outstanding contributions to world food security. Chongqing is an area with frequent high temperature and summer drought, and it is difficult to improve the quality of rice in this area. From mid-July to early August, high temperatures and droughts frequently occur in Chongqing. July to August is the formation period of rice quality. Due to the frequent occurrence of extreme high temperature during the grain filling period, it has a great impact on the appearance quality, processing quality and eating quality. With the improvement of people's living standards and the diversification of dietary structure, there is a structural surplus of rice. The supply of ordinary rice exceeds ...

Claims

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Application Information

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IPC IPC(8): A01H1/04
CPCA01H1/04
Inventor 张现伟李经勇唐永群肖人鹏刘强明潘晓雪李超明
Owner CHONGQING ACAD OF AGRI SCI
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