Cattle population in Ha Giang province is a local bovine breed with an unclear origin, located in northern mountainous area of Vietnam. One study aiming at assessing the genetic diversity and genetic ...structure of this cattle population was undertaken. Twenty-three microsatellites were genotyped for 560 cattle individuals, which were randomly selected from 28 communes of 8 districts. A total 205 alleles were observed in total population. The allelic diversity (average number (±SD) of alleles per locus) was 8.9 ± 2.05. The average observed and expected heterozygosity for the population was 0.67 and 0.73, respectively. The data suggested that exchange of animals between communes occurs at a high level with a mean FST value of 0.013 between communes. The Mantel-test showed that genetic distance increased with geographical distance (R=0.5, P<0.01), indicating that a slight isolation by distance could be issue in this cattle population. The STUCTURE software program was used to cluster individuals to 1k K k10 assumed clusters. The most probable clustering was found at K=2 in which the population was divided into two clusters. The result of phylogentic analysis based on mtDNA sequences provided evidence that cattle population in Ha Giang included two distinct lineages: Bos taurus and Bos indicus. (Résumé d'auteur)
One study with the objective of accessing the genetic diversity of pig populations in Ha Gang province was undertaken. Nineteen microsatellites (FAO) were used to genotype 1053 pig individuals. A ...total 221 alleles were observed. The mean number of alleles per locus was 11.63 ± 3.18 (maximum in locus Sw2410 and minimum in locus Sw2008). In total population, the average observed heterozygote frequency (Ho) was 0,629 (ranged from 0.473 to 0.737) and expected heterozygote frequency (He) was 0.814 (ranged from 0.730 to 0.914). Inbreeding was indicated by heterozygosity deficiency with mean Fis = 0.228. The genetic differentiation between 4 different groups (white, black, brown and black-white pig) was small with a mean Fst = 0.017. The genetic distance was highest between white pig and three other pig groups (black, brown and black-white). There was no significant genetic variation between black and brown pig group (P>0.05). Among 10 district black pig populations, the average allele per population ranged from 7.62 (Meo Vac) to 10.68 (Xin Man), the Fis value was in a range from 0.215 to 0.323. The phylogenetic tree showed that black pig population formed 3 branches: I (Yen Minh, Quan Ba, Dong Van, Meo Vac and Bac Me district), II (Ha Giang, Vi Xuyen and Quang Binh district), III (Xin Man, Hoang Su Phi district). (Résumé d'auteur)
