National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692 Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
The data records of Murrah buffaloes from history cum pedigree sheets maintained over a period of 24 years(1992-2015) at Buffalo research centre(BRC), LUVAS, Hisar and Animal farm ICAR-CIRB, Hisar, were analysed to estimate heritability(h2), genetic and phenotypic correlation among various production and reproduction traits. Production traits whose genetic parameters analysed were Total lactation milk yield (TLMY), 305 days milk yield (305MY), Peak yield (PY) and Lactation length (LL) whereas, reproduction traits include Dry period (DP), Service period (SP) and Calving interval (CI). Data set analysed includes records of 2959 buffaloes which were progeny of 219 sires. Based upon analysis, higher heritability estimates for TLMY, 305MY, PY (h2=0.392±0.114, 0.348±0.118, 0.328±0.122 respectively) were recorded. Comparatively lower estimates of heritability for LL, DP, SP, CI (h2= 0.090 ±0.08, 0.224 ±0.09, 0.211±0.0, 0.211±0.09 respectively) were recorded. High heritability estimate of production traits help to conclude their significance in selection decision and it also indicate that production traits will serve as a better tool for selective breeding, expected to lead to rapid aggregate genetic gains in Murrah production. Further analysis on genetic correlation of production traits we found higher values of genetic correlation as 0.998 ± 0.01(TLMY/ 305MY), 0.728 ± 0.09 (TLMY/PY) and 0.801 ± 0.06 (305MY/PY) whereas reproduction traits have lower and negative genetic correlation. Low and negative genetic correlation of reproduction traits indicate their little genetic role. Positive higher genetic correlations for production traits indicated role of production traits in selection programmae. Further critical analysis revealed that selection based on PY simultaneously will improve total lactation milk yield and 305 days or less milk yield of Murrah buffaloes. Selection based on peak yield also helpful for selection of buffalo at an early stage as compared to 305 days milk yield. It helps to conclude that peak yield may be the best trait to be taken in to selection criteria in for improvement of milk production in Murrah buffaloes.
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