Method of raising ternary wheat hybrid breeding efficiency

Abstract

The present invention discloses one method of raising ternary wheat hybrid breeding efficiency. By means of using the maintenance line of glutinous and partial wheat male sterility line as female parent and polyovary wheat as male parent and introducing the polyovary character gene into the nucleus of the maintenance line, polyovary line in the same type is first created. The polyovary character maintenance line as male parent and the glutinous and partial wheat male sterility line are then hybridized and backcross replaced to breed selectively corresponding polyovary sterility line with glutinous and partial sterile cytoplasm. The glutinous and partial polyovary sterility line is adopted in tissue mating and screening to obtain powerful dominant hybridized combination or reproduce original powerful dominant combination. The present invention exhibits polyovary character in female parent propagation and hybrid production, and raises propagation coefficient and breeding efficiency of sterile line obviously.

Description

technical field [0001] The invention relates to the technical field of wheat heterosis utilization, in particular to a method for improving the benefit of three-line hybrid wheat seed propagation. Background technique [0002] The research and utilization of plant heterosis is one of the important fields of modern genetics research. At present, the utilization of heterosis has obtained huge economic benefits in actual production. Many studies have also shown that wheat also has obvious heterosis, and in-depth research, development and utilization are important ways to greatly increase wheat yield. [0003] There are four main ways to utilize heterosis in wheat: CMS (male sterility induced by nuclear-cytoplasmic interaction), CHA (male sterility induced by andricide), GMS (karyotype male sterility) and PCMS (photothermo-sensitive male sterility). education). Among them, the CMS approach mainly utilizes heterosis through the wheat male sterile line, m...

AI Technical Summary

Problems solved by technology

[0006] Wheat is a crop with small plants and large populations, with a small reproductive coefficient and high seed production costs. The current seed production has increased from 50kg-60kg / 667m 2 Increase to 150kg-250kg / 667m 2 (Small area experiment), but the seed production with rice and corn can reach 250-400kg / 667m 2 Still relatively low, and rice, corn 667m 2 The amount of seed used is only 1-1.5kg / 667m 2 and 2.5kg / 667m 2 , hybrid wheat will need 6-7kg / 667m 2

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