Supergrade hybrid rice breeding parent matching method

Abstract

The present invention uses rice intermedium type sterile line as female parent, uses intermedius type restoring line as male parent for cross breeding rice hybrid species. Said invention also includes that uses hsien rice sterile line and intermedius sterile line as female parent and uses rice hsien-keng crossed duplex haploid (DH) population and hsien-keng crossed recombinant inbred line (RIL) population as male parent to make test cross to obtain four hybrid populations of hybrid F1 generation. By detecting character of F1 and using hisen-keng molecule specific probe to detect keng-type index of F1 correspondent to male parent DH and RIL the F1 character-male-type keng-type index correlation can be obtained.

Description

technical field [0001] The invention relates to rice hybrid breeding technology, in particular to the matching of rice hybrid parents. Background technique [0002] Crop heterosis is well known in the art. Since 1964, my country has started to study the utilization of rice heterosis, and in 1976, it was the first to produce and apply hybrid rice in the world. At present, hybrid rice has covered about 1 / 2 of the country's rice fields. The promotion of hybrid rice has played an important role in increasing my country's grain production year after year. Since the 1970s in my country, the main technical feature of the substantial increase in rice production is the development and popularization of hybrid rice. [0003] In terms of heterosis utilization, the hybrid rice currently used in production is mainly inter-variety hybrid rice, that is, hybrid rice is produced by crossing different varieties within a subspecies (indica or japonica). Studies have s...

AI Technical Summary

Problems solved by technology

However, the general indica-japonica hybrids have low seed setting rate, unfulfilled grains, late maturity, and high plant heights, which restrict the development and utilization of inter-subspecies hybrid rice.