Variety breeding technique for winter-spring hybrid wheat

Abstract

The invention discloses a variety breeding technique for winter-spring hybrid wheat, belonging to the crop breeding field. According to the technique, winter wheat is selected as a female parent, spring wheat is selected as a male parent, the number ratio of the female parent to the male parent is controlled, the partitioning arrangement plantation of the female parent is adjusted, the early maturing of the male parent is promoted by virtue of a fore-winter seeding thermal insulation technique and a fore-winter mulching film covering technique of the spring wheat, and the flower synchronization time of the male parent and the female parent is controlled within 20-30 days; by utilizing one-male parent and multi-female parent method, the breeding effect of the winter-spring hybrid wheat is substantially improved, the breeding success rate of the winter-spring hybrid wheat is substantially increased, meanwhile, the yield of hybrid seeds of the winter-spring wheat is doubled relative to the yield of hybrid seeds of the spring wheat, and the technique has huge increase production advantages and market values.

Description

Technical field [0001] The invention relates to the field of crop breeding, in particular to a technology for selection and breeding of winter and spring hybrid wheat varieties. Background technique [0002] In recent years, due to the rapid population growth, the global demand for food has also increased. As the world’s most edible and widely distributed food crop, wheat is of great significance to food security and social and economic stability to ensure the healthy development of its industry. [0003] The average output of conventional spring wheat in China is only about half of that of winter wheat. In order to greatly increase the yield of spring wheat, spring wheat selection and breeding work is needed. Usually spring wheat hybrid breeding is a cross breeding between spring wheat and spring wheat varieties, but no matter whether 3 lines or 2 lines are used Or chemical maleation methods to select spring wheat hybrid varieties, the female parent contains self-produced seeds; ...

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Problems solved by technology

[0003] The average yield of conventional spring wheat in my country is only about half of that of winter wheat. In order to greatly increase the yield of spring wheat, it is necessary to carry out the breeding of spring wheat. Usually, the hybrid breeding of spring wheat is the hybrid breeding between spring wheat and spring wheat varieties. Or the method of chemical sterilizing for breeding spring wheat hybrid varieties, the female parent contains seeds produced by selfing; due to the factor of selfing seeds of the female parent, the hybrid vigor between common spring wheats is small and the yield increase is small; while the winter and spring wheats are due to The ecological difference is huge, the hybridization advantage is obvious, and at the same time, it has the advantages of automatic elimination of hybrids and automatic purification. However, it is precisely because of the huge ecological difference between winter wheat and spring wheat that winter and spring wheat are often sterile at the flowering stage. It is very difficult to breed new winter and spring hybrid wheat varieties difficulty

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