Abstract:
This study aimed to identify chromosomal regions associated with genetic variation in preweaning
growth traits in Angora goats. A genome-wide scan was performed by genotyping
1042 offspring from 12 half-sib families using 88 microsatellite caprine markers covering
1368cM. Phenotypes were recorded at birth (BW) and weaning (WW) and analysed using
GridQTL software. A total of six putative QTL were detected on six different chromosomes,
all at chromosome-wide significance level. Four QTL were identified for BW on CHI 4, 8,
17 and 27 and two QTL for WW on CHI 16 and 19. QTL effects ranged from
−0.32 to 0.25
in units of residual standard deviation in different families. Some of these QTL correspond
to chromosomes where QTL associated with growth have been identified in other species.
These chromosomal segments hold potential to influence weight gain in young goats.
