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

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...

AI Technical Summary

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 difference in flowering time between the two is At least 1 hour, so using the existing materials to mix the japonica and not the indica, the yield of seed production is often very low, the cost of hybrid rice seeds is high, and it is difficult to popularize and apply in production