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	Lifetime reproductive performance of Chokla sheep at an organized farm in semi-arid conditions
	Mehrotra, Arnav 1,3; Pannu, Urmila 4; Chopra, Ashish 5; Narula, H. K.5; Prince, L. L. L.5
通讯作者	Mehrotra, Arnav
来源期刊	INDIAN JOURNAL OF ANIMAL SCIENCES
ISSN	0367-8318
出版年	2019
卷号	89 期号:8 页码:894-897
英文摘要	The Chokla sheep, renowned as the finest carpet wool producer of India, plays an important role in supporting the rural economy of the arid and semi-arid regions of its native state of Rajasthan. This study was carried out to assess the lifetime reproductive efficiency of Chokla ewes by analyzing the records of 1,001 ewes bearing 3,541 lambs over a period of 22 years (1994-2016) to assess five traits, namely total lambs born (TLB; 3.38 +/- 0.11 lambs), total lambs weaned (TLW; 2.97 +/- 0.11 lambs), cumulative lamb weights at birth (TLBW; 9.59 +/- 0.37 kg), weaning (TLWW; 39.59 +/- 1.68 kg) and 12 months of age (TLAW; 50.15 +/- 2.51 kg) produced by an ewe in her lifetime. Period of birth of ewe had a significant effect on all the traits whereas season of birth, inbreeding coefficient and birth weight of ewe had no influence. REML procedures were employed to estimate the genetic parameters through an animal model. Analysis revealed low heritability estimates for the lifetime reproductive traits (TLB; 0.06 +/- 0.04, TLW; 0.05 +/- 0.04, TLBW; 0.09 +/- 0.05, TLWW; 0.05 +/- 0.04 and TLAW; 0.02 +/- 0.04), suggesting greater role of environmental and managemental factors. Positive correlation among cumulative lamb weights (0.51-0.92) suggested selection for birth weights would result in higher weights at subsequent life stages of lambs. The low heritability estimates and high CV% for all the traits suggest the suitability of a management focussed approach for improvement of lifetime reproductive performance of ewes.
英文关键词	Chokla sheep Ewe efficiency Heritability Least squares Lifetime productivity
类型	Article
语种	英语
国家	India
收录类别	SCI-E
WOS记录号	WOS:000483338500017
WOS关键词	GENETIC-PARAMETERS ; FITNESS TRAITS ; GROWTH
WOS类目	Agriculture, Dairy & Animal Science
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/216280
作者单位	1.Rajasthan Univ Vet & Anim Sci, Bikaner 334001, Rajasthan, India; 2.ICAR Cent Sheep & Wool Res Inst, Bikaner 334006, Rajasthan, India; 3.ICAR Indian Vet Res Inst, Div Anim Genet & Breeding, Izatnagar, Uttar Pradesh, India; 4.CVAS, Dept Anim Genet, Vallabh Vidyanagar, Rajasthan, India; 5.ICAR Directorate Poultry Res, Hyderabad, Telangana, India
推荐引用方式 GB/T 7714	Mehrotra, Arnav,Pannu, Urmila,Chopra, Ashish,et al. Lifetime reproductive performance of Chokla sheep at an organized farm in semi-arid conditions[J],2019,89(8):894-897.
APA	Mehrotra, Arnav,Pannu, Urmila,Chopra, Ashish,Narula, H. K.,&Prince, L. L. L..(2019).Lifetime reproductive performance of Chokla sheep at an organized farm in semi-arid conditions.INDIAN JOURNAL OF ANIMAL SCIENCES,89(8),894-897.
MLA	Mehrotra, Arnav,et al."Lifetime reproductive performance of Chokla sheep at an organized farm in semi-arid conditions".INDIAN JOURNAL OF ANIMAL SCIENCES 89.8(2019):894-897.