Jaques Natasha, Turner Sally-Anne, Vallée Emilie, Heuer Cord, Lopez-Villalobos Nicolas
School of Agriculture and Environment, Massey University, Palmerston North 4442, New Zealand.
Dairy Goat Co-Operative (NZ) Ltd., 18 Gallagher Drive, Melville, Hamilton 3206, New Zealand.
Animals (Basel). 2023 Apr 17;13(8):1374. doi: 10.3390/ani13081374.
The New Zealand goat industry accesses niche markets for high-value products, mainly formula for infants and young children. This study aimed to estimate the genetic parameters of occurrence and susceptibility of clinical lameness and selected claw disorders and establish their genetic associations with milk production traits. Information on pedigree, lameness, claw disorders, and milk production was collected on three farms between June 2019 and July 2020. The dataset contained 1637 does from 174 sires and 1231 dams. Estimates of genetic and residual (co)variances, heritabilities, and genetic and phenotypic correlations were obtained with uni- and bi-variate animal models. The models included the fixed effects of farm and parity, deviation from the median kidding date as a covariate, and the random effects of animal and residual error. The heritability (h) estimates for lameness occurrence and susceptibility were 0.07 and 0.13, respectively. The h estimates for claw disorder susceptibilities ranged from 0.02 to 0.23. The genotypic correlations ranged from weak to very strong between lameness and milk production traits (-0.94 to 0.84) and weak to moderate (0.23 to 0.84) between claw disorder and milk production traits.
新西兰山羊产业面向高价值产品的利基市场，主要是婴幼儿配方奶粉。本研究旨在估计临床跛足和选定蹄爪疾病的发生率及易感性的遗传参数，并确定它们与产奶性状的遗传关联。在2019年6月至2020年7月期间，在三个农场收集了有关系谱、跛足、蹄爪疾病和产奶量的信息。数据集包含来自174头公羊和1231头母羊的1637只母羊。使用单变量和双变量动物模型获得了遗传和残差（协）方差、遗传力以及遗传和表型相关性的估计值。模型包括农场和平胎次的固定效应、作为协变量的与产羔中位数日期的偏差，以及动物和残差误差的随机效应。跛足发生率和易感性的遗传力（h）估计值分别为0.07和0.13。蹄爪疾病易感性的h估计值范围为0.02至0.23。跛足与产奶性状之间的基因型相关性从弱到非常强（-0.94至0.84），蹄爪疾病与产奶性状之间的基因型相关性从弱到中等（0.23至0.84）。
