Selective breeding method of hybrid rice of late blooming season long-grained rice restoring line and subspecies

A restorer line and hybrid rice technology, applied in botany equipment and methods, angiosperms/flowering plants, plant gene improvement, etc., can solve the problems of low stigma exposure rate, difficulty in popularization and application, and low yield of seed production

Inactive Publication Date: 2007-01-03
CHINA NAT RICE RES INST
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Problems solved by technology

The reason for the low yield of seed production is that the female parent is the japonica rice sterile line, the stigma is generally not exposed or the rate of exposure is low, and the flowering time is late, while the male parent indica restorer line often flowers earlier, and the

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0024] (1) Parent source and characteristics

[0025] 1. Source of parents

[0026] In the autumn of 2001, hybridization was carried out with the late-japonica restorer line G230 as the female parent and the early-flowering indica wide-compatibility restorer line Chunhui 58 as the male parent. G230 is a japonica restorer line with a late flowering time and large spikes. Chunhui 58 is an indica wide-compatibility restorer line bred by the China Rice Research Institute, with a relatively early flowering time and good combining ability. In the winter of 2001, the cross generation of the hybrid combination G230 / Chunhui 58 was carried out in Hainan; in the autumn of 2002, F 2 A population of 850 plants, based on the identification of flowering time characteristics, eliminated early flowering plants, and a total of 22 individual plants were selected; in the winter of 2002, F 3 , and continue to identify flowering time characteristics, combined with agronomic traits screening, resi...

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Abstract

The present invention relates to selective breeding method of hybrid rice. The late blooming season wide affiliation long-grained rice restoring line CH59 which excellent agronomic character is selectively bred through hybridizing and generation adding the restoring line G230 as female parent and the restoring line Chuanhui-58 as female parent, the blooming season characteristic identification on the F2 group, eliminating the plants with early blooming season, further blooming season characteristic identification, agronomic character screening, resistance and rice quality identification, fertility restoring capacity determination and affinity identification. By using japonica rice sterile line Chuanjiang 16A and Chuanjiang 12A as female parent and the restoring line CH59 as male parent, the hybrid rice Chuanyou 59 and Chuanyou 259 are bred.

Description

technical field [0001] The invention belongs to the field of rice heterosis utilization. Specifically, the invention relates to a method for selecting and breeding interspecies hybrid rice of rice late flowering partial indica type wide-compatibility restorer line and japonica non-indica restorer subspecies. Background technique [0002] Realizing the utilization of heterosis between indica and japonica rice subspecies has always been the goal pursued by the majority of breeders. In the 1980s, Ikehashi et al. proposed the concept of rice wide compatibility, and then a batch of rice wide compatibility restorer lines were successfully bred, making it possible to utilize heterosis among indica and japonica rice subspecies. Utilization of heterosis between indica and japonica subspecies by three-line method mainly includes indica non-japonica recovery (indica CMS × japonica wide compatibility restorer line) and japonica non indica recovery (japonica CMS × indica wide compatibili...

Claims

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Application Information

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IPC IPC(8): A01H1/02A01H1/04A01H5/00
Inventor 吴明国林建荣宋昕蔚
Owner CHINA NAT RICE RES INST
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