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

BMC Genomics

Table 1 Numbers of genotyped animals with deregressed estimated breeding values used as response variables for each trait in 10 US cattle breeds (ordered by sample size)

Trait¹	Simmental	Angus	Hereford	Limousin	Red Angus	Gelbvieh	Brangus	Maine-Anjou	Shorthorn	Charolais
Birth weight	3930	3203	2735	2185	1711	1254	1316	573	324	200
Calving ease direct	3696	3180	1926	1687	1558	1249	1301	570	318	195
Calving ease maternal	3650	1965	1589	1669	1541	1242	1106	563	318	145
Carcass weight	3859	2448	-	1459	1704	1241	1126	565	238	143
Fat thickness	3347	3155	2311	-	1495	980	1060	171	230	128
Marbling	3338	3199	2242	1447	1510	955	1055	133	231	127
Mature weight	-	1321	2675	-	-	-	-	-	-	-
Ribeye muscle area	3326	3231	2509	1449	1500	943	1101	128	236	138
Weaning weight direct	3885	3191	2737	2150	1710	1248	1319	571	324	198
Weaning weight maternal	3767	2067	1898	1480	1659	1213	583	561	313	155
Yearling weight	3890	2755	2735	1780	1710	1247	1279	571	292	178
Yield grade	3460	-	-	1446	1523	1058	-	301	-	-
Total Animals	4124	3570	2779	2239	1761	1374	1328	574	328	200

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 feral 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