Method for increasing breeding benefit of wheat hybrid

Abstract

The invention method includes the following steps: using spelt wheat as female parent, using multiovaria wheat as male parent, selecting individual body with multiovaria gene and its selfs to obtain spelt wheat with multiovaria character; then using said spelt wheat as female parent and making strong dominant combination with any wheat species or existent wheat and hybridization, continuous backcross, selecting and remaining multiovaria character variety (line) with character similar to that of recurrent parent and spelt wheat cytoplasm; finally, using chemical killing patyway to match or screen wheat super-strong dominant hybridized combination or reproducing original strong dominant combination, in the female parent propagation and hybrid seed production breeding process expressing multiovaria character to raise propagation coefficient and reduce breeding cost.

Description

technical field [0001] The invention relates to a wheat seed production method, in particular to a method for improving the benefits of chemical killing hybrid wheat seed production. Background technique [0002] The research and utilization of crop hybrids and their heterosis have achieved huge economic and social benefits in actual production. Wheat also has obvious heterosis, and its in-depth research, development and utilization is an important way to greatly increase wheat yield. The method of chemical maleicide (CHA) is one of the main ways to achieve initial success in the current research and utilization of wheat heterosis, and to push hybrid wheat into production in a large area. Its outstanding feature is that it can directly use conventional fine varieties (lines) or specific parental materials to prepare hybrid combinations conveniently, without the need to cultivate sterile lines and restorer lines, as long as a strong dominant combinat...

AI Technical Summary

Problems solved by technology

[0003] Wheat is a crop with small plants and large populations, with small reproductive coefficient and high seed production cost. Although the current seed production has increased from 50-60kg / 667m 2 Increase to 150-250kg (small area), 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 , while hybrid wheat needs 5-8kg / 667m 2

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