Please use this identifier to cite or link to this item: http://krishikosh.egranth.ac.in/handle/1/5810029473
Authors: Sandeep Kumar
Advisor: Dahiya, S.P.
Title: Genetic studies on body measurements and performance traits in Harnali sheep”
Language: en
Type: Thesis
Keywords: Harnali sheep, Linear body measurements, Genetic parameter, Performance traits, Prediction equation
Abstract: The present investigation was undertaken to study linear body measurements and performance traits on 349 adult and 94 young animals of Harnali sheep maintained in the Department of Animal Genetics and Breeding, Lala Lajpat Rai University of Veterinary and Animal Sciences, Hisar, Haryana. The least squares means for Length (L), Height (H), Heart girth (HG), Paunch girth (PG), Tail length (TL), Head circumference (HC), Ear length (EL), Ear width (EW) and Face length (FL) were estimated as 69.71±0.36, 68.99±0.22, 81.09±0.29, 84.58±0.50, 28.11±0.63, 46.12±0.26, 16.00±0.26, 8.57±0.13 and 20.27±0.12 cm, respectively. The least squares means for Birth weight (BW), Weaning weight (WW), Six month body weight (SMW), One year body weight (YBW), Adult body weight (ABW), Age at first lambing (AFL) and annual Grease fleece weight (GFW) were estimated as 3.51±0.58 kg, 13.61±0.22 kg, 19.45±0.24 kg, 27.26±0.31 kg, 37.90±0.34 kg, 1662.65±35.46 gm and 789.98±10.40 days, respectively. The period of birth had significant (P<0.01) effect on all traits except HG, PG, TL, EL, EW and GFW. The effect of sex was found significant on all linear body measurements and performance traits except EL and EW. Dam’s age at lambing was found non-significant on all traits under study. However, dam’s weight at lambing significantly (P<0.01) influenced all. Heritability estimates for various body measurements and performance traits were moderate to high ranging from 0.30±0.13 to 0.76±18 indicating the scope of improvement in body dimensions and growth performance of Harnali sheep. Genetic correlations among body measurement traits were low to high in magnitude ranging from -0.01±0.15 to 0.76±0.06. The phenotypic correlations of WW and SMW were significant and positive with BW, YBW and ABW with moderate to high in magnitude ranging from 0.22±0.04 to 0.71±0.07. The genetic correlations among performance traits were low to high ranging from -0.03±0.04 to 0.61±0.12.Veering around the heritability and genetic correlations among performance traits it is infered that SMW can be a good selection criterion at early age as it has high heritability (0.65±0.15) and positive and high correlations with other traits. The phenotypic correlations among body measurements and performance traits were quite varying ranging from -0.01±0.01 to 0.59±0.08. The genetic correlations among body measurements and performance traits were low to high ranging from -0.02± 0.14 to 0.51±0.13. Heart girth was the most important trait for estimation of live body weight in sheep and the prediction equation obtain was: Body weight = - 63.72 + 1.23HG with R2 = 0.87.
Subject: Animal Genetics and Breeding
These Type: M.V.SC
Issue Date: 2016
Appears in Collections:Thesis

Files in This Item:
File Description SizeFormat 
LUVAS-294532-Sandeep, Kumar.pdf
  Restricted Access
1.49 MBAdobe PDFView/Open Request a copy


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.