Method for conducting corn three-way cross hybrid crossbreeding and seed production through three-line combination technology

Abstract

The invention discloses a method for conducting corn three-way cross hybrid crossbreeding and seed production through a three-line combination technology. A corn female sterile line serves as the first female parent, a male fertile corn selfing line from the same line as the corn female sterile line serves as the maintainer line, namely the first male parent, the offspring of the first female parent and the first male parent serves as the second female parent, and the second female parent is the male sterile line; the male fertile corn selfing line different from the corn female sterile line serves as the maintainer line, namely the second male parent, the second female parent and the second male parent are hybridized, the generated F1-generation seeds are the single cross hybrid as the third female parent, and the male part of the third female parent is sterile; a restoring line and the third female parent are hybridized, and the generated F1-generation seeds serve as the three-way cross hybrid. It is absolutely certain that the national three-way cross hybrid standard of the purity is reached, the high hybrid production yield can be quiet easily reached, and the new species has the absolute advantage on market competition.

Description

technical field [0001] The field belongs to the field of breeding and seed production, and relates to a method for producing corn three-cross hybrid breeding by using three-line supporting technology. Background technique [0002] Conventional corn hybrid seed production must be detasselled manually, and only by pulling out the tassels of the female parent in time, cleanly and thoroughly before flowering and loosening pollen, can high-quality hybrid seeds be obtained, but in fact, it is difficult to do so in majority farming . Due to the impurity and low quality of seeds, the phenomenon of yield reduction is not uncommon. The main reason is that the emasculation in the seeding field is not timely or complete, resulting in inferior seeds. The resulting seed disputes occur every year. The most effective measure to solve this problem is to cultivate and utilize three-line corn hybrids. The female parent of these hybrids has no pollen, and the seed production does not require ...

AI Technical Summary

Problems solved by technology

[0003] Although the existing technology is a three-line supporting technology, it adopts the single-cross breeding seed production technology in principle, which is difficult to achieve a higher yield in the seed production output, and has no obvious competitive advantage in the market; although the prior art has adopted The three-series supporting technology has a protective effect on the protection of property rights, but there is still a certain risk of loss of germplasm resources

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