Pleiotropy of the branching locus (B) masks linked and unlinked quantitative trait loci affecting seed traits in sunflower.

TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik
Eleni BachlavaSteven J Knapp

Abstract

The discovery of unbranched, monocephalic natural variants was pivotal for the domestication of sunflower (Helianthus annuus L.). The branching locus (B), one of several loci apparently targeted by aboriginal selection for monocephaly, pleiotropically affects plant, seed and capitula morphology and, when segregating, confounds the discovery of favorable alleles for seed yield and other traits. The present study was undertaken to gain deeper insights into the genetics of branching and seed traits affected by branching. We produced an unbranched hybrid testcross recombinant inbred line (TC-RIL) population by crossing branched (bb) and unbranched (BB) RILs to an unbranched (BB) tester. The elimination of branching concomitantly eliminated a cluster of B-linked seed trait quantitative trait loci (QTL) identified by RIL per se testing. We identified a seed oil content QTL linked in repulsion and a 100-seed weight QTL linked in coupling to the B locus and additional unlinked QTL, previously masked by B-locus pleiotropy. Genomic segments flanking the B locus harbor multiple loci for domestication and post-domestication traits, the effects of which are masked by B-locus pleiotropy in populations segregating for branching and can only b...Continue Reading

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Citations

Aug 10, 2013·Plant Physiology·Srirama Krishna ReddyScott A Finlayson
Apr 5, 2013·PLoS Genetics·Jennifer R MandelJohn M Burke
Jul 25, 2012·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Othmane MerahPatrick Vincourt
Jul 6, 2011·Plant, Cell & Environment·Hongwen SuScott A Finlayson
Apr 4, 2009·PLoS Computational Biology·Gregory W CarterTimothy Galitski
May 23, 2012·Experimental Gerontology·Miriam RodriguezJan E Kammenga
Mar 8, 2013·Experimental Gerontology·Thomas E Johnson
Oct 11, 2017·The Journal of Heredity·Brook T MoyersJohn K McKay
Feb 2, 2018·Frontiers in Plant Science·Aleksandra Dimitrijevic, Renate Horn
Oct 7, 2017·Frontiers in Plant Science·Brigitte ManginNicolas B Langlade
Nov 2, 2018·Genes·Aleksandra RadanovićSiniša Jocić

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