Influence of maternal and additive genetic effects on lamb survival in Harnali sheep

Lamb survival is a critical aspect in the sheep industry as it increases the chances of economic gain in the flock. The objective of the current study was to assess the incidence of lamb mortality in Harnali sheep and to estimate maternal and additive genetic effects of lamb survival using the data...

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Bibliographic Details
Published in:Journal of animal breeding and genetics (1986) 2022-03, Vol.139 (2), p.204-214
Main Authors: Gaur, Parth, Malik, Zile S., Bangar, Yogesh C., Magotra, Ankit, Chauhan, Ashish, Yadav, Devesh Kumar
Format: Article
Language:English
Subjects:
Age
Animal models
Animals
Birth Weight
Confidence intervals
Environmental effects
Female
Genetic effects
Genetic factors
Harnali sheep
Heritability
Lamb
Maternal effects
Maternal Inheritance
Mortality
Parturition
Pregnancy
Red Meat
Regression analysis
Sheep
Statistical analysis
Survival
threshold model
Weaning
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Summary:Lamb survival is a critical aspect in the sheep industry as it increases the chances of economic gain in the flock. The objective of the current study was to assess the incidence of lamb mortality in Harnali sheep and to estimate maternal and additive genetic effects of lamb survival using the data of 2057 lambs born to 134 sires and 623 dams for the period of 20 years (2001–2020). The genetic evaluation was carried out using threshold animal models comprising direct and maternal effects using THRGIBBS1F90 and POSTGIBBSF90 programs. Cumulative mortality (95% CI (confidence interval)) for the S1 (lambs which died up to weaning age), S2 (lambs which died from birth to 6 months of age) and S3 (lambs which died from birth to 12 months of birth) groups was 8.41 (7.21–9.61), 14.10 (12.59–15.60) and 17.70 (16.05–19.34) %, respectively. The logistic regression analysis revealed significant (p 
ISSN:0931-2668
1439-0388
DOI:10.1111/jbg.12655