Impact of sub-setting the data of the main Limousin beef cattle population on the estimates of across-country genetic correlations

Table 7 Summary statistics for estimated across-country genetic correlations (r_g) and their standard errors (SE), for the direct, maternal and direct-maternal effect (within and between-country) in ALL versus each sub-setting scenario (RND, GSCB, GSTOT, HM)

Scenario^a	Direct			Maternal			Direct-maternal
	Direct			Maternal			Within-country			Between-country
	Average	Min	Max	Average	Min	Max	Average	Min	Max	Average	Min	Max
Genetic correlations
ALL	0.79	0.62	0.94	0.71	0.65	0.87	− 0.12	− 0.33	0.40	0.00	− 0.14	0.14
Difference^b in r_g
RND	− 0.02	− 0.04	− 0.01	− 0.04	− 0.07	− 0.02	− 0.12	− 0.17	− 0.04	− 0.11	− 0.16	− 0.06
GSCB	− 0.02	− 0.03	0.00	− 0.05	− 0.08	− 0.03	− 0.13	− 0.17	− 0.04	− 0.11	− 0.17	− 0.03
GSTOT	− 0.02	− 0.03	0.00	− 0.05	− 0.08	− 0.03	− 0.13	− 0.18	− 0.05	− 0.12	− 0.17	− 0.04
HM	− 0.02	− 0.04	0.00	− 0.06	− 0.09	− 0.03	− 0.11	− 0.17	− 0.03	− 0.10	− 0.17	− 0.02
Standard errors
ALL	0.14	0.06	0.22	0.19	0.07	0.33	0.09	0.02	0.16	0.14	0.06	0.23
Difference^b in SE
RND	0.03	0.01	0.06	0.06	0.02	0.10	0.03	0.01	0.07	0.05	0.01	0.09
GSCB	0.03	0.00	0.06	0.05	0.01	0.10	0.03	0.01	0.08	0.04	0.01	0.09
GSTOT	0.02	0.00	0.05	0.05	0.02	0.09	0.03	0.01	0.07	0.04	0.01	0.08
HM	0.03	0.00	0.06	0.06	0.02	0.11	0.03	0.01	0.07	0.04	0.01	0.09

^aALL, all data; RND, herds selected randomly; GSCB, herds selected based on genetic similarity considering common bulls; GSTOT, herds selected based on genetic similarity considering common bulls and common maternal grandsires; HM, herds selected based on harmonic mean of sire’s progeny size
^bResults for the sub-setting scenarios are expressed as a deviation from ALL, i.e. after subtracting the results of ALL

ISSN: 1297-9686