Genetic diversity and population structure of three Indian horse breeds |
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Authors: | Email author" target="_blank">Mamta?ChauhanEmail author Ashok?Kumar?Gupta Santosh?Dhillon |
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Institution: | (1) National Research Centre on Equines, Sirsa Road, Hisar, 125 001, Haryana, India;(2) Department of Biotechnology & Molecular Biology, CCS HAU, Hisar, 125 004, India |
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Abstract: | The genetic relationships of three Indian horse breeds—Marwari, Spiti, and Kathiawari were studied by genotyping 96 individuals
with 20 polymorphic microsatellite markers. A total of 157 alleles were detected across 20 polymorphic loci. The Marwari population
showed the highest allelic diversity (A = 5.7 and Ar = 5.14), followed by Spiti (A = 4.9 and Ar = 4.74) and Kathiawari (A = 4.1 and Ar = 3.82). The gene diversity was highest in the Spiti population (He = 0.67), followed by Marwari (He = 0.66) and Kathiawari (He = 0.59). Within population inbreeding estimates (f) in Marwari, Spiti and Kathiawari breeds were 0.18, 0.08, and 0.07, respectively, suggesting high level of inbreeding in
these breeds. Analysis of bottleneck revealed evidence of recent bottleneck in Spiti and Kathiawari populations. Pair-wise
Fst analysis, AMOVA and assignment tests demonstrated high genetic differentiation and low gene flow between populations. The
information about genetic diversity and population structure will be useful for the future development of effective breeding
management in order to preserve these Indian horse breeds. |
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