Hybrid rice breeding method using parents with close duration from seeding to heading

A technology of hybrid rice at the beginning of sowing, which is applied in the field of hybrid rice breeding, can solve the problems of difficulty in guaranteeing seed production yield, asynchronous transplanting, and heavy labor, so as to improve the efficiency of seed production, improve reliability, The effect of reduced dependence

Active Publication Date: 2015-12-02
RICE RES ISTITUTE ANHUI ACAD OF AGRI SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, this leads to out-of-synchronization of the transplanting of the parents, and the field operation is basically dependent on manual labor, with a large amount of labor and high costs, and it is difficult to adapt to the current situation of reduced human resources engaged in agricultural labor; on the other hand,

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  • Hybrid rice breeding method using parents with close duration from seeding to heading
  • Hybrid rice breeding method using parents with close duration from seeding to heading

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The breeding of embodiment 1 hybrid rice

[0057] (1) Select Huanghuazhan, a parent with a similar sowing start period (about 90 days in Hefei) and a relatively distant genetic distance (Huang Xinzhan / Fenghuazhan F5 generation, bred by the Rice Research Institute of Guangdong Academy of Agricultural Sciences and sold to the outside world) , 14C195 (advanced material bred by Yangdao 6 / RH003, bred by the Rice Research Institute of Anhui Academy of Agricultural Sciences and sold to the outside world);

[0058] (2) Using the self-fertile dual-purpose nuclear sterile line N876S of the Rice Research Institute of Anhui Academy of Agricultural Sciences (sold by the Rice Research Institute of Anhui Academy of Agricultural Sciences) as the female parent (Guangzhan 63S as the female parent, crossed and backcrossed with Minghui 63 post-selfing (BC 1 f 3 ), the obtained two-line male sterile line, the sowing period of 75-80 days) was crossed with Huang Huazhan to obtain the hybrid...

Embodiment 2

[0067] The breeding of embodiment 2 hybrid rice

[0068] (1) Select Huanghuazhan (F5 generation of Huangxinzhan / Fenghuazhan, bred by Rice Research Institute of Guangdong Academy of Agricultural Sciences), 14C195 ( The high-generation material selected by Yangdao 6 / RH003 was bred by the Rice Research Institute of Anhui Academy of Agricultural Sciences and sold to the outside world);

[0069] (2) Using the self-fertile dual-purpose GMS line N876S of the Rice Research Institute of Anhui Academy of Agricultural Sciences as the female parent (Guangzhan 63S as the female parent, crossed with Minghui 63, self-crossed after backcrossing (BC 1 f 3), the obtained two-line male sterile line, the sowing period of 75-80 days) was crossed with Huang Huazhan to obtain the hybrid F 1 (S). will hybrid F 1 (S) Direct selfing produces F 2 (S) groups;

[0070] (3) Yangdao 6 was treated with 13np34, a material with golden shell and golden internodes obtained by mutagenesis from the Rice Rese...

experiment example 1

[0080] Comparison of Seed Production Efficiency in Experimental Example 1

[0081] The seed production efficiency of the hybrid rice combination bred in Example 1 of the present invention was compared with that of the control example, and the results are shown in Table 1.

[0082] Table 1 Comparison of Seed Production Efficiency

[0083]

[0084] The results show that traditional hybrid rice breeding requires manual sowing and transplanting of the parents in stages due to the different sowing periods of the male parent and the female parent, which requires a large amount of labor and high cost. The risk of not meeting this flowering period is relatively large, and it is difficult to guarantee the yield of seed production.

[0085] However, the growth period of the parents of the hybrid rice combination of the present invention is similar (difference between the beginning and end of sowing≤2 days), mechanical mixed sowing does not need to transplant the parents, and realize...

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Abstract

The invention discloses a hybrid rice breeding method using parents with close duration from seeding to heading and belongs to the breeding field of hybrid rice. The hybrid rice breeding method disclosed by the invention comprises: improving a rice sterile line and a restorer line by using different rice parents with close duration from seeding to heading and relatively remote genetic distance; carrying out sowing in different stages under different ecological environmental conditions to obtain a sterile line and a restorer line with close duration from seeding to heading and stable agronomic traits; then carrying out a test cross, planting a test cross F1 generation, and selecting a hybrid combination with excellent traits to obtain the hybrid rice with parents having close growing duration. The method ensures flower synchronization when the male parent and the female parent are sowed at a same stage, so that the reliability of production of hybrid seeds is improved; meanwhile, the mechanical operation in the field is further facilitated, the dependence on the labor force is reduced, the cost is lowered, and the efficiency of production of hybrid seeds is improved.

Description

technical field [0001] The invention relates to a hybrid rice breeding method, in particular to a hybrid rice breeding method whose parents have similar sowing start periods, and belongs to the field of hybrid rice breeding. Background technique [0002] Rice is the main food crop in China. At present, the annual rice planting area is about 430-440 million mu, of which the annual planting area of ​​hybrid rice is about 220 million mu, accounting for more than 50% of the total rice area, which contributes to the substantial increase in rice production and food security in China. made a great contribution. [0003] At present, most of the hybrid rice combinations promoted in China have a relatively large difference in the sowing start period (the number of days from sowing to the beginning of heading) between the male parent (restorer line) and the female parent (sterile line) (generally, the male parent period is long, and the reproductive period of the female parent is shor...

Claims

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Application Information

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IPC IPC(8): A01H1/02
Inventor 倪大虎杨剑波宋丰顺倪金龙李莉
Owner RICE RES ISTITUTE ANHUI ACAD OF AGRI SCI
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