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In this study, we estimated genetic diversity and population structure of Bangladeshi zebu cattle populations and the semi-domesticated gayal breed by using a high-density SNP genotyping chip recently developed from indicine cattle.
05) in the gayal population, whereas the total number of monomorphic SNP makers was 3364 in the zebu population (Table 3).
The PCA results clustered the RC and ND as one population, whereas the gayal population was observed as a separate cluster (Figure 1).
Reproductive potentials of gayal (Bos frontalis) under semi-intensive management.
In Bangladesh, gayal is the only wild relative of domestic zebu cattle found in the Chittagong hill tract regions, predominantly in Bandarban district together with other wild animal species like jungle fowl, wild pig, and wild quail.
KARYOTYPIC AND PHYLOGENETIC STUDIES REVEAL THE ORIGIN OF GAYAL
Many animal taxonomists once mistook gayal as a domesticated type of Indian gaur because of their similar appearance (Ma et al.
1980) analyzed the karyotypes of three Bos species where they observed the number, form, and configuration of gayal chromosomes were different from yellow cattle (Bos taurus) and gaur (Bos gaurus) and their numbers of chromosomes were 58, 60, and 56, respectively.
2010) analyzed mtDNA control region sequences of 71 samples and SRY gene sequences of 39 samples, together with the available sequences in GenBank which showed that Yunnan gayal originated from the hybridization between male Bos frontalis and female Bos taurus or Bos indicus, and that Yunnan cattle mostly originated from B.
Unlike domestic cattle the large semi-domesticated gayal has a bony dorsal ridge on the shoulder and white stocking on all four legs.
The gayal was classified as a separate subgenus, together with Bali cattle (Bos banteng), the kouprey (Bos sauveli) and the gaur (Bos gaurus), and distinct from European cattle (Bos taurus) and zebu cattle (Bos indicus) (Williamson and Payne, 1977).
These data, combined with Cyt b sequences of other bovine species in GenBank, were used to perform phylogenetic analysis in order to explore the molecular phylogeny and taxonomic status of the gayal and to provide some molecular biological gist for evaluating and protecting this rare genetic resource.
The results suggest that the gayal might have close relationships with Bos taurus, Bos indicus and Bos gaurus.
The second and third embranchments close clustered with Bos taurus and Bos indicus, respectively, which suggested that the gayal might contain a maternal origin of Bos taurus or Bos indicus.
1984) proposed that the gaur was the wild ancestor of the gayal according to karyotype, red blood cells and haemoglobin type.