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Sire evaluation and selection of Indian dromedary females for milk production: issues and strategies

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Title Sire evaluation and selection of Indian dromedary females for milk production: issues and strategies
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Creator SC Mehta, SBS Yadav, Sajjan Singh, UK Bissa
 
Subject Camel, milk, selection, sire evaluation
 
Description Not Available
Sire evaluation through estimation of breeding value was done for seven dromedary sires utilising 74 lactation records spanning over last five years. The average daily milk production (Mean ą SEM) from two-teat was 3.13 ą0. 15 litres and 300 days’ yield was 905.18 ą46. 3 litres. The effect of breed on daily milk production and 300 days’ yield was non-significant (P> 0.05) but the effect of parity was significant (P< 0.05) with highest production in third parity (3.54 ą0. 24 litres). The effect of year was also highly significant with highest average daily production in the year 2008 (4.02 ą0. 28 litres). The unadjusted two-teat average daily milk yield and the 300 days’ milk yield was utilised for the estimation of random effect due to sire and fixed effects due to parity and year after deleting records of progeny with unknown sires. The breeding values for sires used ranged from 2.88 ą0. 25 to 3.42 ą0. 23 litres for daily milk yield and 828.78 ą72. 00 to 975.93 ą67. 13 litres for 300 days’ yield. Though, the mean ą 1 standard deviation (SD) encompassed the entire range of the breeding values of all the sires evaluated, still the top ranking sires or their progeny may be preferred over others in breeding. The repeatability of average daily milk yield and 300 days ‘yield was estimated to be 0.40 and 0.39 respectively, indicating the potential use of present performance as an indicator of future performance. In order to rank the females, the production data was adjusted for the significant effects of parity and year. The overall mean ą standard deviation for the two-teat average daily yield was 3.18 ą 0.70 litres and that for 300 days’ yield was 922.9 ą 211.2 litres. The animals …
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Date 2020-01-07T08:50:08Z
2020-01-07T08:50:08Z
2014-06-01
 
Type Article
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/29351
 
Language English
 
Relation Not Available;
 
Publisher Camel Publishing House