Genetic evaluation of mastitis liability and recovery through longitudinal analysis of transition probabilities

Franzén, Jessica; Thorburn, Daniel; Urioste, Jorge I; Strandberg, Erling

doi:10.1186/1297-9686-44-10

Genetics Selection Evolution

Table 2 Average correlations between true and estimated breeding values

From: Genetic evaluation of mastitis liability and recovery through longitudinal analysis of transition probabilities

	Daughters/sire	60				150
	Mastitis frequency (cases/lactation)	0.28 Scenario 1		0.95 Scenario 2		0.28 Scenario 1		0.95 Scenario 2
	Transition direction	HD	DH	HD	DH	HD	DH	HD	DH
r_G = 0	B(τ) = 10 × L(τ)	0.532	0.249	0.697	0.387	0.749	0.381	0.836	0.550
		(0.012)	(0.018)	(0.012)	(0.021)	(0.009)	(0.016)	(0.005)	(0.013)
	Cows	24000	4149	24000	10151	60000	10374	60000	25450
	Herds	1200	1095	1200	1197	1200	1187	1200	1200
	B(τ) = 15 × L(τ)	0.549	0.271	0.702	0.436	0.751	0.410	0.838	0.619
		(0.007)	(0.013)	(0.012)	(0.018)	(0.009)	(0.012)	(0.005)	(0.006)
	Cows	24000	4128	24000	10139	60000	10328	60000	25411
	Herds	1200	1092	1200	1197	1200	1186	1200	1200
r_G = 0.2	B(τ) = 10 × L(τ)	0.589	0.268	0.684	0.407	0.760	0.386	0.834	0.533
		0.0148	(0.015)	0.0108	(0.014)	(0.013)	(0.028)	(0.007)	(0.016)
	Cows	24000	4131	24000	10161	60000	10366	60000	25453
	Herds	1200	1094	1200	1198	1200	1184	1200	1200
	B(τ) = 15 × L(τ)	0.592	0.301	0.690	0.467	0.766	0.436	0.837	0.612
		(0.013)	(0.012)	(0.011)	(0.016)	(0.013)	(0.021)	(0.006)	(0.010)
	Cows	24000	4115	24000	10148	60000	10322	60000	25425
	Herds	1200	1093	1200	1197	1200	1183	1200	1200
r_G = -0.2	B(τ) = 10 × L(τ)	0.588	0.236	0.683	0.396	0.764	0.372	0.820	0.562
		(0.017)	(0.019)	(0.013)	(0.021)	(0.011)	(0.021)	(0.015)	(0.012)
	Cows	24000	4136	24000	10189	60000	10423	60000	25428
	Herds	1200	1087	1200	1123	1200	1187	1200	1200
	B(τ) = 15 × L(τ)	0.591	0.257	0.688	0.431	0.766	0.468	0.824	0.607
		(0.016)	(0.019)	(0.011)	(0.013)	(0.010)	(0.045)	(0.014)	(0.011)
	Cows	24000	4118	24000	10176	60000	10408	60000	25396
	Herds	1200	1084	1200	1195	1200	1187	1200	1200

Correlations (in bold) between true and estimated breeding values in the healthy to diseased (HD) and diseased to healthy (DH) directions ( $(r_{B V}^{(H D)})$ and $(r_{B V}^{(D H)})$ ) for different combinations of genetic correlation (r_G), daughters per sire, mastitis frequency, and boundary level (B(τ)); the number of cows and herds used for each correlation are also reported; reported values in the table are the mean and standard errors (within parentheses) based on five replicates

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ISSN: 1297-9686

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