Growth performance and carcass traits of purebred and crossbred fattening lambs from Ghezel ram with Grey Shirazi ewe.

Autor: Karimi A; Animal Science Research Department, Fars Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Shiraz, Iran. ab.karimi@areeo.ac.ir., Abarghuei MJ; Animal Science Research Department, Fars Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Shiraz, Iran., Boostani A; Animal Science Research Department, Fars Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Shiraz, Iran.
Jazyk: angličtina
Zdroj: Tropical animal health and production [Trop Anim Health Prod] 2021 Dec 27; Vol. 54 (1), pp. 26. Date of Electronic Publication: 2021 Dec 27.
DOI: 10.1007/s11250-021-03017-2
Abstrakt: In this investigation, performance, feed efficiency, and carcass traits of 48 weaned crossbred Grey Shirazi × Ghezel and purbred Grey Shirazi fattening lambs (mean live weight (LW), 28.5 ± 0.5 kg and age, 115 ± 5 days) were evaluated. Lambs were divided into 4 groups contain the GM group (12 purebred male lambs of Grey Shirazi ewe × Grey Shirazi ram), the GF group (12 purebred female lambs of Grey Shirazi ewe × Grey Shirazi ram), the CM group (12 crossbred male lambs of Grey Shirazi ewe × Ghezel ram), and the CF group (12 crossbred female lambs of Grey Shirazi ewe × Ghezel ram). The dry matter intakes (DMIs), average daily gain (ADG), and carcass traits in the lambs were determined. The DMI was greater in CF lambs compared to GF lambs (P < 0.001). Feed conversion ratio (FCR) was higher in male lambs comparing to female lambs (P = 0.001). The final body weight (FBW), ADG, live weight at the slaughtering, and hot carcass weight (HCW) were lower in GF lambs compared to another lambs (P < 0.0005, P = 0.002, and P = 0.0007, respectively). Cold carcass weight (CCW) in CM lambs was higher than in other groups. The Longissimus lumborum (LL) area was higher in crossbreed male lambs (P = 0.001). Crossbreeding improved grow performance (FBW and ADG) in male and female lambs. Carcass trait was improved by crossbreeding especially in male lambs. Sex effect on growth performance and carcass traits was noticeable and male lambs had superior growth.
(© 2021. The Author(s), under exclusive licence to Springer Nature B.V.)
Databáze: MEDLINE
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