Cytogenetic Studies in Indigenous Livestock Breeds of Nepal / N Gorkhali ; SP Neopane    

Public ISBD in Proceedings of the 7th (seventh) National Workshop on Livestock and Fisheries Research, June 22-27, 2007 / Shrestha, B.S.     Title : Cytogenetic Studies in Indigenous Livestock Breeds of Nepal Material Type: printed text Authors: N Gorkhali, Author ; SP Neopane, Author Pagination: 310-316 p. Languages : English (eng) Abstract: Nepal has many domestic livestock population, which are adapted to their particular environments, resistant to many diseases and are suitable to low input management system. If the purity of indigenous stock could be maintained as a reservoir of g<.!nes, they may be of great value for future. Twenty five indigenous livestock breeds were identified so far. Most of the indigenous breeds are characterized in phenotypic level. However, cattle breeds, Lulu and Yak; goat breeds such as Terai and Khari; sheep breeds such as Baruwal, Kage and Bhyanglung and bum1lo breeds such as Lime, Parkote and Gaddi are characterized in chromosomal level. The Lulu cattle had a normal karyotype with 2n = 60, XY or XX. Male had a large submetacentric X chromosome and a small sub-metacentric Y chromosome. In case of buffaloes. Lime and Parkote from Western Development Region have 5 pairs of sub-metacentric autosomes, 19 pairs of acrocentric autosomes and a pair of sex chromosome. In male, X chromosome was the largest acrocentric, whilst the Y chromosome was one of the smallest acrocentric chromosomes. There is breedwise variation in karyotype. In Gaddi buffalo, even though the number of chromosome is same, there is structural variation. In terai goat, metaphasic spread of chromosome has 29 pairs of autosome and a pair of sex chromosome. Among the sex chromosome, X chromosome was larger metacentric while Y chromosome was smaller telocentric type. The karyotype organization ofthree identified sheep ofNepal was found to be the same with chromosomes 2n = 54. If we can characterize each and every descript and non-descript breed in phenotypic and genetic level, we would be able to develop breeding policy for each native commodity and thereby, further action on indigenous breed like promotion and utilization can be done. Link for e-copy: http://elibrary.narc.gov.np/?r=363 in Proceedings of the 7th (seventh) National Workshop on Livestock and Fisheries Research, June 22-27, 2007 / Shrestha, B.S.     Cytogenetic Studies in Indigenous Livestock Breeds of Nepal [printed text] / N Gorkhali, Author ; SP Neopane, Author . - [s.d.] . - 310-316 p. Languages : English (eng) Abstract: Nepal has many domestic livestock population, which are adapted to their particular environments, resistant to many diseases and are suitable to low input management system. If the purity of indigenous stock could be maintained as a reservoir of g<.!nes, they may be of great value for future. Twenty five indigenous livestock breeds were identified so far. Most of the indigenous breeds are characterized in phenotypic level. However, cattle breeds, Lulu and Yak; goat breeds such as Terai and Khari; sheep breeds such as Baruwal, Kage and Bhyanglung and bum1lo breeds such as Lime, Parkote and Gaddi are characterized in chromosomal level. The Lulu cattle had a normal karyotype with 2n = 60, XY or XX. Male had a large submetacentric X chromosome and a small sub-metacentric Y chromosome. In case of buffaloes. Lime and Parkote from Western Development Region have 5 pairs of sub-metacentric autosomes, 19 pairs of acrocentric autosomes and a pair of sex chromosome. In male, X chromosome was the largest acrocentric, whilst the Y chromosome was one of the smallest acrocentric chromosomes. There is breedwise variation in karyotype. In Gaddi buffalo, even though the number of chromosome is same, there is structural variation. In terai goat, metaphasic spread of chromosome has 29 pairs of autosome and a pair of sex chromosome. Among the sex chromosome, X chromosome was larger metacentric while Y chromosome was smaller telocentric type. The karyotype organization ofthree identified sheep ofNepal was found to be the same with chromosomes 2n = 54. If we can characterize each and every descript and non-descript breed in phenotypic and genetic level, we would be able to develop breeding policy for each native commodity and thereby, further action on indigenous breed like promotion and utilization can be done. Link for e-copy: http://elibrary.narc.gov.np/?r=363

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