Animal Genetics and Breeding

Animal Genetics and BreedingThe major research activities of this section are identification, evaluation, genetic characterization and conservation mithun germplasm. Complete cytogenetic analysis including karyotyping and different chromosomal bandings (C-banding and R-Banding) carried out revealed that the normal diploid number of mithun was 58XX and 58 XY for male and female. In order to find out the karyotypic evolution of mithun, FISH technique was used on the metaphase chromosome of mithun as well as wild ancestral species, Gaur. Besides, several economically important genes including kappa casein, leptin, and growth hormones were also characterized. In the recent past, this section also carried out the microsatellite based characterization of different mithun population and muscle transcriptome analysis. Presently, whole genome sequencing of mithun for the construction of a draft genome assembly and genomic characterization of mithun using bovine HDchip estimating population diversity parameters in farm and field mithun population is underway.

  • Construction of a draft assembly thorough next-generation sequencing and identification of around 27000 genes in mithun genome.
  • Muscle transcriptome analysis of mithun of divergent growth performance and identification of differentially expressed genes (BioProject ID PRJNA307305).
  • Preparation of first ever R- and C-banded karyotypes of mithun and a Cytogenetic Digital Album of mithun.
  • In first ever study of flurorescent in-situ hybridization (FISH) of mithun chromosomes, highly repetitive regions of centromere and telomere were amplified using bovine primers. The centromeric signals were observed in all the acrocentric autosomes of all the species. However, in contrast to Tho-Tho cattle, FISH signals could not be detected in the sub-metacentric chromosomes of mithun, mithun x cattle crossbreds and gaurs (Bos gaurus). This cytogenetic study also revealed close relatedness of mithun with gaur (Bos gaurus).

Animal Genetics and Breeding

  • Phenotypic and Genetic Characterization of mithun and determination of genetic relationship with gaur and other bovine species based on microsatellites and bovine HDchip.

Animal Genetics and Breeding

  • Mithun leptin protein was isolated from adipocyte tissues, purified using affinity column chromatography, and analyzed  by MALDI TOF-TOF-mass spectroscopy  revealed a molecular mass of 17214.26 Da. Mithun lepetin was also found to possess sero-reactive property that might be exploited while preparing of sero-diagnostic tool(s) for detecting leptin in clinical samples and/or measuring leptin concentration in blood.

Animal Genetics and Breeding

Sero-reactivity of affinity purified bound protein with known antiserum and control serum as assessed by Dipstick ELISA. Dip-stick 1: Anti-mithun leptin antibody (hyperimmune serum); Dip-stick 2: Negative control (normal serum)

  • Determination of age by Dentition patterns of mithuns under field conditions