20世纪40年代以来埃及绵羊和山羊研究与发展综述:ii -当地绵羊品种的表型特征、生产和繁殖性能

A. Aboulnaga, T. Abdelsabour
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引用次数: 0

摘要

埃及当地的绵羊品种广泛分布在全国各地;主要由小农饲养,对他们的生计有重大贡献。当地品种很好地适应了当时炎热干燥的条件和有限的饲料资源。它们是厚尾羊,粗毛开阔,饲养主要用于肉类和羊肉生产。埃及有四种主要的绵羊品种;北三角洲地区的Rahmani羊,埃及中部的Ossimi羊,地中海沿岸地区的Barki羊和上埃及的Saidi羊。次要的地方品种有Fallahi、Wahati、Abudeleik和Suhagi羊,主要分布在南部和边境省份。每个品种都描述了特殊和独特的表型特征。主要地方品种的生产性能包括体重、胴体质量、羊毛和产奶量,均按文献报告列示。生殖性能包括青春期的年龄,发情和繁殖活动的讨论。介绍了地方品种对普遍的亚热带环境的适应性,特别是对热应激的适应性。在正在进行的关于繁殖适应法生产本地动物与高产低耐受性外源品种的辩论中,讨论了当地品种的优势等关键问题。地方羊品种的改良计划需要一种核心羊群结构,如育种者协会或村庄羊群,以及利用基因组分析的最新发现。
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Review of Sheep and Goat Research and Development in Egypt Since the Forties: II-Phenotypic Characteristics, Production, and Reproduction Performance of Local Sheep Breeds
Egyptian local sheep breeds are widely spread over the country; raised mainly by smallholders and contribute significantly to their livelihood. Local breeds are well adapted to the prevailing hot dry conditions, and limited feed resources. They are fat-tailed sheep, open coarse wool and raised mainly for meat and lamb production. There are four major sheep breeds in Egypt; Rahmani sheep in north-Delta, Ossimi sheep in MidEgypt, Barki sheep in the Mediterranean coastal zone, and Saidi sheep in Upper Egypt. Minor local breeds are Fallahi, Wahati, Abudeleik, and Suhagi sheep located mainly in the south and in boarder governorates. Special and unique phenotypic characteristics are described for each breed. Production performance of the main local breeds include body weights, carcass quality, wool, and milk production, are tabulated as reported in the literature. Reproduction performance involving age at puberty, estrous, and breeding activity are discussed. Adaptability of local breeds to the prevailing subtropical environment, specially heat stress are presented. Key issues as the advantages of the local breeds, within the ongoing debate on breeding adapted law producing local animals, vs. high producing low tolerant exogenous breeds are discussed. Improvement programs for local sheep breeds requires sort of nucleus flock structure, as breeders association or village flocks, and the utilization of the recent findings of genomic analysis.
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