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Genetic analysis of the effects of heat stress before and after lambing on pre‐weaning live weight in Spanish Merino lambs by Antonio Molina; Sebastián Demyda‐Peyrás; Manuel Sánchez; Juan M. Serradilla; Alberto Menéndez‐Buxadera is a Agricultural and Biological Sciences article available to read on EtoBox.
What is Genetic analysis of the effects of heat stress before and after lambing on pre‐weaning live weight in Spanish Merino lambs about?
## Abstract ## Background Heat stress (HS) is a major environmental effect on sheep production. Hereby, we estimated the genetic (co)variance component of HS on the pre‐weaning performance of 19,022 Merino lambs by analysing the climatological index of temperature and relative humidity (recorded 30 days before lambing and after lambing) using transversal and longitudinal mixed linear models. ## Methods and Results The global impact of HS during the last 30 days of pregnancy was −17% for birthweight and ranged between −4% and −8% for live weight at 15, 30 days of age (W30), and average daily gain from birth at 30 days. The results from both statistical approaches showed very similar heritabilities (__h__ ^2^), ranging from 0.192 to 0.237 for the direct genetic (__D__) effects and from 0.072 to 0.082 for the maternal genetic (__M__) effects, but the antagonism between (__D__) and (__M__) was higher when a longitudinal model was used. A significant genotype‐environmental effect was also found regardless of whether the climatological covariables were considered in the model. In addition, we employed __D__ and __M__ breeding values for W30 as an example to create a new subjacent index b
Who reads Genetic analysis of the effects of heat stress before and after lambing on pre‐weaning live weight in Spanish Merino lambs?
It is typically read by researchers, students, and practitioners in Agricultural and Biological Sciences.
- Author
- Antonio Molina; Sebastián Demyda‐Peyrás; Manuel Sánchez; Juan M. Serradilla; Alberto Menéndez‐Buxadera
- Publisher
- Wiley
- Published
- 2022
- Language
- EN
- Field
- Agricultural and Biological Sciences (Life Sciences)