Genetic parameters for somatic cell score, milk yield and type traits in Nigerian Dwarf goats.

Content Provider	Europe PMC
Author	Valencia-Posadas, Mauricio Lechuga-Arana, Alma Arianna Ávila-Ramos, Fidel Shepard, Lisa Montaldo, Hugo H.
Copyright Year	2022
Abstract	ObjectiveThis study was conducted to estimate multi-trait genetic parameters for somatic cell score (SCS), milk yield and type traits in Nigerian Dwarf (ND) goats from the United States.MethodsData from 1,041 ND goats in the United States with kiddings in 95 herds were used to estimate multi-trait genetic parameters for SCS, milk (MILK), fat (FAT), and protein (PROT) yields, and 14 type traits. An 18-trait mixed linear animal model for lactation mean SCS (Log2), MILK, FAT, PROT, and 14 type traits was applied. A factor analytic approach (FA1) in ASReml software was used to obtain convergence.ResultsAverages for SCS were low (2.85±1.29 Log2), and were 314±110.6, 20.9±7.4, and 14±4.9 kg, respectively, for MILK, FAT, and PROT. Heritabilities for SCS, MILK, FAT, and PROT were 0.32, 0.16, 0.16, and 0.10, respectively. The highest heritabilities for type traits were for stature (0.72), teat diameter (0.49), and rump width (0.48), and the lowest estimates were for dairyness (0.003) and medial suspensory ligament (0.03). Genetic correlations of SCS with MILK, FAT, and PROT were positive but low (0.25, 0.18, and 0.23, respectively). Genetic and phenotypic correlations between MILK, FAT, and PROT were high and positive (≥0.66). Absolute values of genetic correlations involving SCS with type traits were generally low or no different from zero. Most of the phenotypic correlations involving SCS with type traits were low. No serious unfavorable genetic correlations between milk yield traits and SCS or between milk yield traits or SCS and type traits were found.ConclusionGenetic variation exists in the ND breed for most studied traits. The development of selection programs based on these estimates may help accelerate favorable multi-trait genetic changes in this breed.
Related Links	https://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC8902223&blobtype=pdf
ISSN	27650189
Journal	Animal Bioscience [Anim Biosci]
Volume Number	35
DOI	10.5713/ab.21.0143
PubMed Central reference number	PMC8902223
Issue Number	3
PubMed reference number	34237919
e-ISSN	27650235
Language	English
Publisher	Animal Bioscience
Publisher Date	2021-06-23
Access Restriction	Open
Rights License	This is an open-access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Copyright © 2022 by Animal Bioscience
Subject Keyword	Fat Yield Genetic Correlation Goats Heritability Protein Yield
Content Type	Text
Resource Type	Article
Subject	Genetics Physiology Veterinary Animal Science and Zoology Food Science