Volume 16, Issue 4 (12-2021)                   MGj 2021, 16(4): 299-307 | Back to browse issues page

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Asadollahpour Nanaei H, Nosrati M, Mohammadabadi M R. Genetic structure analysis of Akhal-Teke horse population and comparison with other horse breeds by using whole genome sequencing data. MGj. 2021; 16 (4) :299-307
URL: http://mg.genetics.ir/article-1-1722-en.html
2Department of Agriculture, Payame Noor University, PO BOX 19395-3697 Tehran, Iran
Abstract:   (376 Views)
Akhal-Teke horse is one of the oldest breeds in the south of Turkmenistan and north of Iran, which has been adapted to live in the harsh environmental conditions of Central Asia. This breed has been selected for speed for nearly 100 years; therefore, investigation of its genetic structure could improve breeding programs. The sequenced data of 86 horses from 16 breeds were downloaded from NCBI and used in this study. The phylogeny tree for the individual genome sequences was constructed. The PCA was performed using the software GCTA. In order to visualize population structure between different horse breeds, ADMIXTURE was used. The parsimony analysis revealed all breeds were divided base on geographical origins. Principal component analysis illustrated highest genetic distance among Akhal-Teke with Thoroughbred and Standard bred. Results of admixture demonstrated all individuals of Akhal-Teke assign strongly to one cluster in hypothetical population of k=4 and k=5. However, when the hypothetical population of k=2 and k=3 were done, the individual were appeared in 2 or 3 color. The mean number of ROH in Akhal-Teke was lower than Thoroughbred, Sorraia, Standard bred and Quarter and ROH>1000kb was more. Therefore, comparing to these breeds the inbreeding was lower in Akhal-Teke. The highest value of linkage disequilibrium in all bean distance was detected in Thoroughbred. After that, two breeds of Akhal-Teke and Standard bred had similar pattern. In conclusion, comparing to Thoroughbred and Standard bred, Akhal-Teke was less influenced by breeding program and the level of heterozygosity was moderate. Therefore, considering the use of this breed in the disciplines of sprinting, endurance, jumping and dramatic movements, it seems that the genetic diversity at the genome level of this breed can be used in the breeding program in this field.
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Type of Study: Applicable | Subject: Subject 02
Received: 2021/08/21 | Accepted: 2021/10/20 | Published: 2022/01/1

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