Genetic basis of agronomically important traits in sugar beet (Beta vulgaris L.) investigated with joint linkage association mapping.

TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik
J C ReifT Würschum

Abstract

Epistatic interactions may contribute substantially to the hybrid performance of sugar beet. The main goal of our study was to dissect the genetic basis of eight important physiological and agronomic traits using two different biometrical models for joint linkage association mapping. A total of 197 genotypes of an elite breeding population were evaluated in multi-location trials and fingerprinted with 194 SNP markers. Two different statistical models were used for the genome-wide scan for marker-trait associations: Model A, which corrects for the genetic background with markers as cofactors and Model B, which additionally models a population effect. Based on the extent of linkage disequilibrium in the parental population, we estimated that for a genome-wide scan at least 100 equally spaced markers are necessary. We mapped across the eight traits 39 QTL for Model A and 22 for Model B. Only 11% of the total number of QTL were identified based on Models A and B, which indicates that both models are complementary. Epistasis was detected only for two out of the eight traits, and contributed only to a minor extent to the genotypic variance. This low relevance of epistasis implies that in sugar beet breeding the prediction of performa...Continue Reading

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Citations

Jun 18, 2011·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Wenxin LiuJochen Christoph Reif
Jul 16, 2011·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Tobias WürschumJochen Christoph Reif
Sep 8, 2011·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Tobias WürschumJochen C Reif
Nov 15, 2011·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Yusheng ZhaoJochen C Reif
May 24, 2012·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Wenxin LiuTobias Würschum
May 19, 2018·Molecular Breeding : New Strategies in Plant Improvement·Manje GowdaBoddupalli M Prasanna
Mar 30, 2017·Plant Cell Reports·Jitendra KumarShiv Kumar
Dec 14, 2018·Frontiers in Plant Science·Xin HuDongfa Sun

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