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Study on Beta Casein Polymorphism in Malnad Gidda and Crossbred Cattle

KrishiKosh

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Title Study on Beta Casein Polymorphism in Malnad Gidda and Crossbred Cattle
 
Creator Navyashree, T.C.
 
Contributor Nagaraja, C.S.
Jayashankar, M.R.
Satyanarayan, K.
Shettar, V.B.
 
Subject dormancy, sowing, developmental stages, organic compounds, germinability, groundnuts, concentrates, cytokinins, aba, harvesting
 
Description PG. Thesis
The exon 7 region of beta casein gene of Malnad Gidda and crossbred cattle was
studied with an objective of analyzing its polymorphism. PCR–RFLP analysis of the
amplified region revealed monomorphic pattern in Malnad Gidda and polymorphic
pattern in crossbred cattle. Only A2A2 genotype was found in Malnad Gidda cattle. A2
allele was predominant in crossbred cattle with an allelic frequency of 0.79 while A1
allelic frequency was 0.21. The frequencies of A1A1, A1A2 and A2A2 genotypes were
0.13, 0.18 and 0.69 respectively, in crossbred cattle. The Malnad Gidda population was in
Hardy Weinberg equilibrium indicating absence of selection pressure while crossbred
population was not in equilibrium. The sequence analysis confirmed the difference
between A1 and A2 allele due to SNP resulting in substitution of ‘C’ to ‘A’ causing
replacement of proline by histidine.
The present study confirmed the theory that A2 allele of beta casein is predominant in Bos indicus and crossbred cattle possess both A1A2 heterozygotes and A2A2 homozygotes.
 
Date 2016-10-26T10:44:44Z
2016-10-26T10:44:44Z
2014-08-16
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/82038
 
Language en_US
 
Format application/pdf