Large-effect pleiotropic or closely linked QTL segregate within and across ten US cattle breeds

BMC Genomics

Table 5 Trait heritabilities used to derive factors for weighted analyses of deregressed estimated breeding values in 10 US cattle breeds

Trait¹	Angus	Brangus	Charolais	Gelbvieh	Hereford	Limousin	Maine-Anjou	Red Angus	Shorthorn	Simmental
Birth weight	0.42	0.42	0.49	0.42	0.43	0.42	0.42	0.42	0.36	0.42
Calving ease direct	0.18	0.23	0.24	0.12	0.10	0.12	0.12	0.12	0.14	0.12
Calving ease maternal	0.12	0.12	0.16	0.13	0.10	0.13	0.13	0.13	0.14	0.13
Carcass weight	0.40	0.27	0.21	0.40	-	0.40	0.40	0.40	0.32	0.40
Fat thickness	0.34	0.35	0.26	0.35	0.30	-	0.35	0.35	0.35	0.35
Marbling	0.45	0.23	0.36	0.54	0.26	0.54	0.54	0.54	0.28	0.54
Mature weight	0.55	-	-	-	0.10	-	-	-	-	-
Ribeye muscle area	0.51	0.39	0.34	0.46	0.26	0.46	0.46	0.46	0.33	0.46
Weaning weight direct	0.20	0.24	0.25	0.30	0.20	0.30	0.30	0.30	0.23	0.30
Weaning weight maternal	0.14	0.12	0.14	0.15	0.10	0.14	0.15	0.15	0.06	0.15
Yearling weight	0.45	0.49	0.31	0.29	0.36	0.29	0.29	0.29	0.36	0.29
Yield grade	-	-	-	0.40	-	0.40	0.40	0.40	-	0.40

¹Birth weight: live weight at birth. Calving ease direct: the ability of a calf to be born unassisted because of its size and length of gestation. Calving ease maternal: the genetic ability of a dam for unassisted calving of her newborn because of her own pelvic size, her ability to relax the pelvis and the ability of her uterus to limit fetal growth to a manageable size. Carcass weight: weight recorded just before the carcass enters the chilling room during the processing of finished cattle. Fat thickness: the amount of fat opposite the ribeye muscle at the cut surface between the 12^th and 13^th ribs. Marbling: the amount and distribution of intramuscular fat on the cut surface of the ribeye muscle between the 12^th and 13^th ribs. Mature weight: live body weight at maturity. Ribeye muscle area: area measurement on the cut surface of the ribeye muscle between the 12^th and 13^th ribs. Weaning weight direct: the pre-weaning growth ability of a calf. Weaning weight maternal: the milking and mothering ability of a dam for pre-weaning growth of a calf. Yearling weight: live weight at yearling. Yield grade: the estimated amount of boneless, closely trimmed retail cuts from the high-value parts of the carcass-the round, loin, rib, and chunk.

ISSN: 1471-2164