Preliminar Refined Localization of QTL for Fleece Traits in Five Goat Chromosomes Using SNP Markers in a Backcross Population

Abstract Text: This study aimed to confirm and improve the identified chromosomal regions associated with genetic variation in fleece traits in a backcross Angora x Creole goats design. Five caprine chromosomes (CHI1, CHI2, CHI5, CHI13 and CHI19) were studied by genotyping 297 offspring from 5 F1 (Angora x Creole) families using 2918, 2544, 2038, 1514 and 1107 SNPs on each chromosome and nineteen fleece fiber traits recorded.  QTL detection was based on linkage analysis and on the joint linkage (LA) and linkage disequilibrium analysis (LDLA) using the QTLmap software. Six putative QTL detected in previous microsatellite based study were confirmed here and at least 12 additional new QTLs were identified from both LA and LDLA method. Nevertheless to refine deeply these regions should be necessary to use more elaborate analysis approaches

Keywords:

SNP

Backcross design

Fleece and fiber traits

Goat