UTICAJ NEGENETSKIH FAKTORA NA MASU JAGNJADI PRI ROĐENJU, SA 30 I 90 DANA STAROSTI KOD SJENIČKE PRAMENKE

M. Petrovič, Snežana Bogosavljević-Bošković, Radojica Đoković, Simeon Rakonjac, M. Petrovič, Halid Žigić
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Abstract

Overall sheep production is influenced by certain factors, genetic and paragenetic. Fertility traits of sheep are more influenced by non-genetic systematic factors, whether they are discontinuous in nature (year of birth, season of birth and lambing, partus in order, type of birth, sex of lambs) or continuous (age at first insemination, etc.). The research included 180 sheep of the Pramenka breed, Sjenica pramenka in the breeding areas of three municipalities: Priboj, Prijepolje and Nova Varos. Data on the growth of lambs in the lactation period were analyzed, as follows: weight at birth, weight at the age of 30 and 90 days of age. The influence of fixed paragenetic factors such as: breeding area, year of birth of ewes, lambing in order, type of lambing, sex on the manifestation and variability of the observed characteristics of lamb growth in the lactation period was observed. The breeding area and type of birth had a significant effect (P <0.01) on the weight of lambs from all three age categories. The year of birth of lambs and the interaction of the breeding area and type of birth had a highly significant effect (P <0.01) on the mass of lambs at birth and at the age of 90 days, and significantly (P <0.05) on the mass of lambs at 30 days of age. Lambs in a row and a half of lambs did not significantly affect any trait of lamb growth in the lactation period. The coefficients of determination for the observed traits were high and very significant and ranged from 0.775 (77.5%) in the mass of lambs at birth to 0.397 (39.7%) in the mass at 30 days.
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绵羊的整体产量受某些遗传和共生因素的影响。绵羊的生育性状更多地受到非遗传系统因素的影响,无论是不连续的(出生年份、出生季节、产羔顺序、出生类型、羔羊性别)还是连续的(首次授精年龄等)。该研究包括180只Pramenka品种的绵羊,Sjenica Pramenka,分布在Priboj、Prijepolje和Nova Varos三个市的繁殖区。对泌乳期羔羊的生长数据进行分析,结果如下:出生体重、30日龄体重和90日龄体重。观察了繁殖地区、母羊出生年份、产羔顺序、产羔类型、性别等固定共生因素对泌乳期羔羊生长特征的表现和变异的影响。繁殖地区和出生类型对3个龄羔羊的体重均有极显著影响(P <0.01)。羔羊出生年份、繁殖区域和出生类型的交互作用对羔羊出生时和90日龄的质量有极显著影响(P <0.01),对羔羊30日龄的质量有极显著影响(P <0.05)。泌乳期1排半羔羊对羔羊生长的各项性状无显著影响。所观察到的性状的决定系数很高且非常显著,其范围为出生羔羊质量的0.775(77.5%)至30日龄羔羊质量的0.397(39.7%)。
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