Heritability of and genetic correlations among faecal egg counts and productivity traits in Romney sheep
Heritability of and genetic correlations among faecal egg counts and productivity traits in Romney sheep
复制标题
罗姆尼羊粪便卵数和生产力性状的遗传力和遗传相关性
DOI：
10.1080/00288233.1992.10417701
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发表时间：
1992
影响因子：
1.8
通讯作者：
A. Parker
中科院分区：
文献类型：
--
作者：
S. Bisset;A. Vlassoff;C. Morris;Southey Br;R. L. Baker;A. Parker
摘要对霍克湾某养殖场60只公羊3年的后代2611只春季出生的罗姆尼母羊进行了研究，以估计粪蛋数(FEC)的遗传力及其与生产性状的相关性。每3年记录一次断奶重、一次秋重、两次增重之间的增重和一周龄的产毛量。在最后2年中获得DAG评分。1987年出生的羔羊在1月中旬被施以驱虫剂，之后进一步治疗被推迟到4月份。在接下来的两年中，在12月的第一周进行淋浴处理，直到一个小监测组的平均FEC达到1000-1500个蛋/克的目标值。一旦达到目标值，从所有动物身上取粪便样本进行FEC，测量DAG评分和秋季体重，然后恢复常规淋浴。方差分量估计采用多元约束最大似然估计。
Abstract A total of 2611 spring-born Romney ewe lambs, the progeny of 60 sires over 3 years, were studied on a Hawke's Bay farm to estimate the heritability of faecal egg count (FEC), and correlations between FEC and production traits. Weaning weight, an autumn weight, the weight gain between these 2 times, and yearling fleece weight were recorded in each of 3 years. A dag score was obtained in the final 2 years. An anthelmintic drench was administered to 1987-born lambs in mid January after which further treatment was withheld until April. In the 2 subsequent years, drench treatment was administered in the first week of December and further treatment withheld until the mean FEC in a small monitor group reached a target value of 1000-1500 eggs/g. Once the target value was reached, a faecal sample was obtained from all animals for an FEC, the dag score and autumn liveweight were taken, and routine drenching was then resumed. Variance components were estimated using a multivariate restricted maximum likelih...