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Influence of maternal and additive genetic effects on offspring growth traits in Beetal goat
Author(s) -
Magotra Ankit,
Bangar Yogesh C.,
Chauhan Ashish,
Malik B.S.,
Malik Z.S.
Publication year - 2021
Publication title -
reproduction in domestic animals
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.546
H-Index - 66
eISSN - 1439-0531
pISSN - 0936-6768
DOI - 10.1111/rda.13940
Subject(s) - maternal effect , heritability , zoology , biology , weaning , genetic correlation , additive genetic effects , restricted maximum likelihood , genetic variation , offspring , trait , birth weight , genetics , pregnancy , maximum likelihood , statistics , mathematics , gene , computer science , programming language
The purpose of the present study was to obtain estimates of variance components and genetic parameters for direct and maternal effects on various growth traits in Beetal goat by fitting four animal models, attempting to separate direct genetic, maternal genetic and maternal permanent environmental effects under restricted maximum likelihood procedure. The data of 3,308 growth trait records of Beetal kids born during the period from 2004 to 2019 were used in the present study. Based on best fitted models, the direct additive h 2 estimates were 0.06, 0.27, 0.37, 0.17 and 0.10 for birth weight (BWT), weight at 3 (WT3), 6 (WT6), 9 (WT9) and 12 (WT12) months of age, respectively. Maternal permanent environmental effects significantly contributed for 10% and 7% of total variance for BWT and WWT, respectively, which reduced direct heritability by 40 and 10% for respective traits from the models without these effects. For average daily gain (ADG1) and Kleiber ratios (KR1) up to weaning period (3 months) traits, maternal permanent environmental effects accounted for 7% and 8% of phenotypic variance, respectively, and resulted in a reduction of 6.6% and 5.4% in direct h 2 of respective traits. For post‐weaning traits, the maternal effects were non‐significant ( p > .05) which indicates diminishing influence of mothering ability for these traits. High and positive genetic correlations were obtained among WT3‐WT6, WT6‐WT9 and WT9‐WT12 with correlations of 0.96 ± 0.25, 0.84 ± 0.23 and 0.90 ± 0.13, respectively. Thus, early selection at weaning age can be practised taking into consideration maternal variation for effective response to selection in Beetal goat.