Breeding method for solving color difference problem of colored fresh-eating corn grains

Abstract

A breeding method for solving a color difference problem of colored fresh-eating corn grains is characterized in that conventional colchicine or herbicide induction and other chemical induction methods are adopted, a female gamete chromosomal of an amphiphilic selfing line is induced for doubling to make genotypes including a genotype controlling grain colors highly homozygous; followed by, according to color standards of varieties, grain color and depth phenotypes are subjected to genotype identification and selection; an amphiphilic selfing line with pure and uniform colors and consistent genotypes and phenotypes is obtained, finally, pure colors and uniform color depth of hybrid grains in a fresh-eating period and a hybrid mature period are achieved, and the color ratio is consistent to a theoretical value; and the breeding method has the technical effects that the color genotypes are highly homozygous, the grain colors in the fresh-eating period are pure and uniform, and the color phenotype ratio is consistent to the theoretical value. No matter compared with conventional techniques or molecular techniques, the method has the advantages of good color effect, accurate breeding result, high breeding efficiency, fast homozygous speed, low economic cost, simple techniques, easy operation, and convenience for application.

Description

technical field [0001] The invention belongs to the technical field of plant breeding, in particular to the breeding technology for the color of fresh corn grains such as colored waxy corn and sweet corn. Background technique [0002] In the breeding of colored fresh corn, the color and uniformity of the kernels at the fresh ear harvesting stage are inconsistent with those at the maturity stage, or the color ratio deviates greatly from the theoretical value, which has always been an unsolved technical problem in the breeding of colored fresh corn. Taking red glutinous corn (pink) single-cross as an example, although the kernel color of the F1 generation is uniform and red at the mature stage, the color of different kernels on the same ear is not consistent at the fresh ear harvesting stage, that is, the filling stage. , showing pink, pale pink, blush, a small amount of erythema, and even non-colored kernels. For another example, in the single-cross hybrid of red glutinous (...

AI Technical Summary

Problems solved by technology

[0028] The present invention aims at the problems such as impure grain color, inconsistency in depth and large deviation between the ratio of colored grains and the theoretical value caused by the difficulty in homozygous color genotypes of colored fresh edible corn inbred lines and hybrids. The chemical induction technology is used as a purification A method of genotyping, that is, using chemically induced parthenogenesis in maize to purify the genotypes of the two inbred lines, so that the genotypes that control the color of the kernels can be homozygous and fixed at one time, and then select according to the color target of the variety