Genetic Studies on Growth Traits and Growth Rates in Dorper Crossbred Sheep

Asian Resonance(P: ISSN No. 0976-8602 RNI No.UPENG/2012/42622 VOL.-IV, ISSUE-II, April-2015 E: ISSN No. 2349-9443)

Abstract


 Dibyendu Chakraborty 

Assistant Professor, Deptt.of Animal Genetics & Breeding, University Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, Jammu


Vikas bin Zaffer

 MVSc. Scholar , Deptt.of Animal Genetics & Breeding, University Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, Jammu


Anamika

 MVSc.Scholar , Deptt.of Animal Genetics & Breeding, University Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, Jammu


Mohd. Rameez 

MVSc.Scholar, Deptt.of Animal Genetics & Breeding, University Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, Jammu


D. Kumar 

Assistant Professor, Deptt.of Animal Genetics & Breeding, University Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, Jammu


R. K. Taggar

 Prpfessor, Deptt.of Animal Genetics & Breeding, University Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, Jammu

Data on growth traits of 401 animals used in the present study were collected from history sheet of crossbred sheep maintained at Government Sheep Breeding Farm Panthal, Reasi, J&K, India. Growth traits included in the study were birth weight (BWT), weaning weight (WWT), 6-month bodyweight (6-BW) and 12-month bodyweight (12-BW). The average weight gain of individual lambing during 0-3 months (ADG1), 3-6 months (ADG2), 6-12 months (ADG3) and 3-12 months (ADG4) were calculated as weight gain during particular period divided by duration of that period in days. The statistical analysis was carried out using LSMLMW computer programme. Least-squares means for various growth traits under study were 2.80 ± 0.08 kg, 14.44 ± 0.40 kg, 17.59 ± 0.41 kg, 22.70 ± 0.41 kg, 122.27 ± 3.74 gm, 37.69 ± 2.47 gm, 31.26 ± 1.23 gm and 33.42 ± 0.99 gm for BWT, WWT, 6-BW, 12-BW, ADG1, ADG2, ADG3 and ADG4, respectively. Year of lambing had significant effect on all the growth traits under study except for BWT. Season of lambing had non-significant effect on all the growth traits except for ADG2. Sex of lambs had highly significant effect on BWT, WWT, ADG1, ADG2 and ADG4 growth traits. The heritability ranged from 0.111 ± 0.108 (ADG3) to 0.999 ± 0.305 (ADG2). Six month body weight (6-BW) had high heritability and genetic & phenotypic correlations with other growth traits indicate that 6-BW can be used as selection criterion for selection of individuals at early age and also will reduce the generation interval.

for full paper please visit below link :

http://www.socialresearchfoundation.com/upoadreserchpapers/1/44/1506261108091st%20dibyendu%20chakrobarty.pdf


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