Genetic parameters of birth weight trait in dromedary camels (Camelus dromedarius)

Tropical Animal Health and Production
Szabolcs BenePéter Nagy

Abstract

Birth weight data of dromedary calves from the database of one of the world's largest dairy herds (Dubai, UAE) were analyzed for the period from 2007 to 2018. The assessment included the data of 4124 camel calves that were classified into six ecotypes (Emirate, Emirate crossed, Black, Pakistanian, Saudi-Sudanian, and Saudi crossed). The aim of the study was to describe the heritability of birth weight of calves and the breeding value of sires. Genetic parameters of birth weight were estimated by ANOVA model and two BLUP animal models as well. The mean value of the camel calves' birth weight was 34.75 ± 5.67 kg. The direct heritability of birth weight (h2d = 0.09 ± 0.04-0.11 ± 0.03) was rather low, so was the maternal heritability (h2m = 0.23 ± 0.10-0.50 ± 0.06). The maternal effect from environmental origin (c2 = 0.23 ± 0.08) far exceeded the results previously calculated in cattle. There was no difference in reliability between BLUP1 and BLUP2 models, and both of them were more accurate than the ANOVA model. Based on the results of this study, we conclude that the birth weight of dromedary calves was more influenced by the dam's intrauterine rearing capacity and by the environment, management, and feeding of the pregnant femal...Continue Reading

References

Mar 1, 1979·Journal of Animal Science·H F HintzL D Van Vleck
Oct 1, 1991·Journal of Animal Science·A C CubasM H Healey
Apr 25, 2007·Animal Biotechnology·R K VijhS T Bharani Kumar
May 11, 2016·Proceedings of the National Academy of Sciences of the United States of America·Faisal AlmathenPamela A Burger

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Citations

Sep 7, 2021·Acta Veterinaria Hungarica·Szabolcs BenePéter Nagy

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Methods Mentioned

BETA
genotyping

Software Mentioned

MTDFREML
DFREML
HARVEY

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