A major qtl affecting 1000-grain weight of wheat and its application

Abstract

The invention belongs to the field of wheat genetics and breeding, and provides a major QTL affecting 1000-grain weight of wheat. The major QTL site is located on the short arm of chromosome 6A, between the SNP marker left marker AX-109959301 and the right marker AX-109405872; There is a candidate gene encoding a flowering-promoting factor at the QTL locus; the explanation rates of the phenotypic variation of the 1000-grain weight by this QTL locus are 14.6%-22.3% respectively; The 1000-grain weight can be increased by 3.6-6.4 grams, and the QTL locus has great application value in wheat breeding.

Description

technical field [0001] The invention belongs to the field of wheat genetics and breeding, and in particular relates to a major QTL affecting the thousand-grain weight of wheat and its application. Background technique [0002] Wheat is one of the most important food crops in the world, and its output is an important factor affecting the development and stability of the national economy. Therefore, increasing yield has always been one of the most important breeding goals for breeders. Thousand-grain weight is one of the three factors of wheat yield, and increasing thousand-grain weight is an important way to increase wheat yield. Therefore, breeders study 1000-grain weight as an important indicator in breeding. [0003] Among the three factors of yield, grain weight has the greatest heritability and is also the yield trait that is least affected by the environment. Thousand kernel weight is a quantitative trait controlled by multiple genes. With the gradual maturity of QT...

AI Technical Summary

Problems solved by technology

[0004] But so far, few QTLs and molecular markers for wheat 1000-grain weight have been applied to breeding

Because most of the previous wheat QTLs were linkage maps constructed using SSR markers, the marker density was low, and most of the SSR markers were designed based on non-coding regions

Images