Process for predicting the phenotypic trait of yield in maize
AssigneeDekalb Genetics Corporation
InventorRichard Johnson
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Abstract
This invention relates to a method for improving the efficacy of a plant breeding program which has as its goal to selectively alter phenotypic traits that are capable of being described numerically and are under the control of quantitative trait loci (QTLs). The method combines the newer techniques of molecular biology with modifications of classical pedigree breeding strategies. Progeny performance is predicted on the basis of at least one secondary trait, facilitating selection strategies. In particular, regression estimates are obtained by determining the relationship between selected inherited marker loci and quantitative phenotypic trait values in predictor populations, and used in combination with inherited marker profiles of plants, to implement a selection strategy in related populations.
Claims7
A process for predicting the phenotypic trait of yield in a plant of a progeny maize population through analysis of genotypes of a first and second single cross hybrid maize population, said process comprising the steps of:
- (a) quantitatively assessing the distribution of said phenotypic trait of yield in members of said first plant population;
- (b) genotyping members of both populations for an inherited genetic marker;
- (c) evaluating said phenotypic trait in conjunction with the genotype of said first plant population to define an association between said phenotypic trait and said inherited genetic marker;
- (d) predicting the value of the phenotypic trait of yield in progeny of said second plant population using said association, and
- (e) selecting progeny of said second population based on said association.
Dependencies are inferred from the claim text.