• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Tropical Animal Health and Production >Phenotypic Characterization of Indigenous Tswana Goats and Sheep Breeds in Botswana: Continuous Traits
【24h】

Phenotypic Characterization of Indigenous Tswana Goats and Sheep Breeds in Botswana: Continuous Traits

机译：博茨瓦纳土著茨瓦纳山羊和绵羊品种的表型表征：连续性状

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The majority of Tswana sheep and goats in Botswana are indigenous. These animals provide income, employment and food security to the resource-poor farmers. Limited characterization of these species has been done, resulting in poor efforts to fully exploit and conserve them. The objective of this study was to phenotyically characterize indigenous sheep and goats countrywide. Measurements were collected from 2783 goats and 1282 sheep kept by traditional farmers, covering nearly all the districts of Botswana. In each district a total of 15 farmers with sheep and goats were selected randomly and records were taken on 4–12 animals per farm, depending on average district flock size. Traits recorded for each animal were body length, body weight, ear length, heart girth, height at withers, hip width, neck length, rump height, shoulder width, tail length (goats only) and horn length. Age (estimated from dentition) and sex of the animals were also recorded and vegetation type was noted. The data were analysed using the general linear model procedure in Statistical Analysis System. Prior to analyses, a main effects model of sex, age and vegetation type was fitted. Later, two types of analyses were done: (i) within a vegetation type fitting sex and age and their interaction, and (ii) within sex fitting age and vegetation type and their interaction. Least-squares means were separated using Student's t-test. Sex, age and vegetation significantly (p<0.05) affected the magnitude of traits. Phenotypic body measurements of castrates were generally higher than in both females and entire males, which were similar. The body measurements of younger animals were less than those of older age groups since the former were still growing compared to the latter. Different vegetation types promoted different body measurements, which should be expected due to differences in nutrient supply from different vegetation types. The indigenous breeds of sheep and goats can be classified as medium-size breeds. The breeds should be conserved since they are well suited to the harsh environment of Botswana where drought and livestock diseases are ever present. Efforts should be undertaken to characterize them genetically and increase their productivity.
机译：博茨瓦纳的茨瓦纳大多数绵羊和山羊是土著人。这些动物为资源贫乏的农民提供收入，就业和粮食安全。对这些物种的有限表征已经完成，导致人们难以充分利用和保护它们。这项研究的目的是在全国范围内表征土著绵羊和山羊。从博茨瓦纳几乎所有地区的传统农民饲养的2783只山羊和1282只绵羊收集了测量数据。在每个地区，随机选择了15位有绵羊和山羊的农民，并根据每个地区的平均鸡群规模对每个农场记录了4-12只动物。记录的每只动物的性状是体重，体重，耳朵长度，心脏周长，肩高，臀围，颈部长度，臀部高度，肩膀宽度，尾巴长度（仅山羊）​​和角长。还记录了动物的年龄（从牙列估计）和性别，并记录了植被类型。使用统计分析系统中的一般线性模型程序分析数据。在分析之前，拟合了性别，年龄和植被类型的主要影响模型。后来，进行了两种类型的分析：（i）在适合性别和年龄及其相互作用的植被类型内，以及（ii）在适合年龄和植被类型及其相互作用的性别内。最小二乘均值使用学生t检验进行分隔。性别，年龄和植被显着（p <0.05）影响性状的大小。 cast割的表型身体测量值普遍高于女性和整个男性，两者相似。较年轻的动物的体形要比年龄较大的动物要小，因为前者与后者相比仍在增长。不同的植被类型促进了不同的身体测量，这是由于不同的植被类型所提供的营养供应不同而引起的。绵羊和山羊的土著品种可归为中型品种。该品种应得到保护，因为它们非常适合曾出现干旱和牲畜疾病的博茨瓦纳恶劣环境。应努力从遗传上表征它们并提高其生产力。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号