Variance components and correlations of female fertility traits in Chinese Holstein population

Table 3 Correlations^a between performances of a trait in different parities using a multi-trait model

Trait^b	IFL	CR	AIS	NRR56	ICF	DO
\( {r}_{a_0,{a}_1} \)	0.64 (0.09)	0.45(0.15)	0.48(0.11)	0.65(0.18)
\( {r}_{a_0,{a}_2} \)	0.49 (0.12)	0.52(0.18)	0.40(0.13)	0.74(0.22)
\( {r}_{a_0,{a}_3} \)	0.61 (0.14)	0.25(0.22)	0.55(0.14)	0.37(0.23)
\( {r}_{a_1,{a}_2} \)	0.89 (0.06)	1.00(0.11)	0.92(0.06)	0.99(0.24)	0.91(0.03)	0.89(0.05)
\( {r}_{a_1,{a}_3} \)	0.93 (0.08)	0.66(0.19)	0.92(0.08)	0.92(0.23)	0.92(0.04)	0.96(0.05)
\( {r}_{a_2,{a}_3} \)	0.94 (0.07)	0.63(0.21)	0.94(0.07)	0.87(0.24)	0.96(0.04)	0.96(0.05)
\( {r}_{e_0,{e}_1} \)	0.06 (0.01)	0.03(0.004)	0.07(0.005)	0.004(0.004)
\( {r}_{e_0,{e}_2} \)	0.04 (0.01)	0.01(0.01)	0.05(0.01)	−0.002(0.005)
\( {r}_{e_0,{e}_3} \)	0.04 (0.01)	0.01(0.01)	0.05(0.01)	0.01(0.01)
\( {r}_{e_1,{e}_2} \)	0.09 (0.01)	0.02(0.01)	0.09(0.01)	0.02(0.01)	0.05(0.01)	0.12(0.01)
\( {r}_{e_1,{e}_3} \)	0.07 (0.01)	0.02(0.01)	0.08(0.01)	0.02(0.01)	0.01(0.01)	0.08(0.01)
\( {r}_{e_2,{e}_3} \)	0.11 (0.01)	0.04(0.01)	0.13(0.01)	0.03(0.01)	0.07(0.01)	0.14(0.01)

^a \( {r}_{a_i,{a}_j} \) = genetic correlation between performances of a trait in parities i and j, \( {r}_{e_i,{e}_j} \) = residual correlation between performances of a trait in parities i and j. Phenotypic correlations were similar to residual correlations (not presented)
^b IFL interval from first to last insemination, CR conception rate at first insemination, AIS number of inseminations per conception, NRR56 non-return rate at 56 days after first insemination, ICF interval from calving to first insemination, DO days open

ISSN: 2049-1891