A Survey of Genome-Wide Genetic Characterizations of Crossbred Dairy Cattle in Local Farms in Cambodia
Somony Mam,
Bengthay Tep,
Soriya Rin,
Yoshihisa Uenoyama,
Shuichi Matsuyama,
Satoshi Ohkura,
Tetsuma Murase,
Mitsuo Nunome,
Yasuhiro Morita
Affiliations
Somony Mam
Asian Satellite Campus in Cambodia, Nagoya University, c/o Royal University of Agriculture, Phnom Penh P.O. Box 2696, Cambodia
Bengthay Tep
Department of Animal Health and Veterinary Public Health, General Directorate of Animal Health and Production, Phnom Penh P.O. Box 12352, Cambodia
Soriya Rin
Asian Satellite Campus in Cambodia, Nagoya University, c/o Royal University of Agriculture, Phnom Penh P.O. Box 2696, Cambodia
Yoshihisa Uenoyama
Laboratory of Animal Reproduction, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, 464-8601, Japan
Shuichi Matsuyama
Laboratory of Animal Production Science, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, 464-8601, Japan
Satoshi Ohkura
Laboratory of Animal Production Science, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, 464-8601, Japan
Tetsuma Murase
Laboratory of Veterinary Theriogenology, Joint Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan
Mitsuo Nunome
Laboratory of Animal Genetics, Department of Zoology, Faculty of Science, Okayama University of Science, Okayama 700-0005, Japan
Yasuhiro Morita
Laboratory of Animal Production Science, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, 464-8601, Japan
To improve the dairy sector in Cambodia in the future, we aimed to reveal the genetic variation and the milk production in Cambodian crossbred dairy cattle. We calculated the percent (%) milk fat content and the average milk yield per cow (L/day) for two farms (Farm R and M) based on the farmers’ records and interviews. The crossbred cows originated from Cambodian local farmers and Thailand breeders in Farm R, whereas the crossbred cows originated in Thailand breeders in Farm M. Then, we performed genetic characterization for 75 individuals from the two farms and an individual Japanese pure Holstein-Friesian cow based on 133,705 single nucleotide polymorphisms (SNPs) obtained by the GRAS-Di method. The milk fat contents in the bulk milk in the dry season and the average milk yield per cow on Farm R were 3.77 ± 0.98% and 7.81 ± 2.66 L/day, respectively, and were higher than those on Farm M (3.35 ± 0.54% and 6.5–7.5 L/day). Cattle originating in Cambodia in Farm R possessed a unique genetic character different from cattle from Thailand in Farm M. The present study suggests that the differences in milk fat content between the two farms might be explained by the genetic differences in crossbred cows.
