Carrillo L, Segura J C
Campo Experimental de Mocochá, Mérida, Yucatán, México.
Trop Anim Health Prod. 1993 Aug;25(3):173-8. doi: 10.1007/BF02236237.
Data on 4,754 lambs born from Pelibuey (PB) and Barbados Blackbelly (BB) ewes collected over 9 years at the Mococha Experimental Centre in Yucatan, Mexico, were used to determine environmental, dam-breed and sire-breed effects on birth weight (BW), weaning weight (WW) and average daily gain (ADG). Effects of year and season of birth, sex of the lamb, type of birth, breed of dam, breed of sire, their interaction and ewe body weight were included. Heritabilities were estimated for each breed. Season of lambing was a significant source of variation on WW and ADG. Male lambs weighed more than female lambs at birth and weaning. Single born lambs were heavier than twins and triplets. Lambs born from PB dams were heavier and grew faster than those born from BB dams. Heritabilities of BW, WW and ADG for the PB breed were 0.16 +/- 0.04, 0.12 +/- 0.03 and 0.11 +/- 0.03, respectively and 0.04 +/- 0.07, 0.17 +/- 0.09 and 0.15 +/- 0.08 for the BB breed. Heterosis values were close to zero.
在墨西哥尤卡坦州莫科查实验中心，历时9年收集了4754只出生于佩利布韦（PB）和巴巴多斯黑腹（BB）母羊的羔羊数据，用于确定环境、母本品种和父本品种对出生体重（BW）、断奶体重（WW）和平均日增重（ADG）的影响。研究纳入了出生年份和季节、羔羊性别、出生类型、母本品种、父本品种、它们之间的相互作用以及母羊体重等因素。对每个品种进行了遗传力估计。产羔季节是断奶体重和平均日增重变异的一个重要来源。雄性羔羊在出生和断奶时比雌性羔羊体重更重。单胎出生的羔羊比双胎和三胎出生的羔羊更重。出生于PB母羊的羔羊比出生于BB母羊的羔羊更重且生长更快。PB品种出生体重、断奶体重和平均日增重的遗传力分别为0.16±0.04、0.12±0.03和0.11±0.03，BB品种分别为0.04±0.07、0.17±0.09和0.15±0.08。杂种优势值接近零。
