南非西北省山羊养殖户的生产目标和性状偏好:确定社区育种计划选择标准的方法

Fortunate Mtshali Thobile, Ntanganedzeni Mapholi Olivia, Tebogo Ncube Keabetswe, Farai Dzomba Edgar, C. M. Tlou, C. C. T., D. T., Catherina Muchadeyi Farai, Hadebe Khanyisile
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引用次数: 4

摘要

育种实践和性状偏好是确定合理育种目标和设计社区遗传改良方案的关键。目前的研究在南非西北省Pella村的一个试验性社区育种项目中确定了这些影响山羊的因素。采用半结构化问卷调查法对35名牧羊农户进行了访谈,以了解牧羊农户的生产体系特征。采用自行进行的群级试验确定了26户家庭的饲养目标,并收集了10只最佳公、公羊的体重(kg)和线性测量(cm)。大多数农民是男性(83%)和有文化(85.7%)。15个(43%)农民拥有一头雄鹿,而那些没有雄鹿的农民则依靠公共资金。每户平均鸡群为21±19只。农户卖价为1588.68±313.17兰特,雄鹿卖价为1663.89±861.91兰特。雄鹿(0.22)和雌鹿(0.10)的体型性状排名最高,其次是生长速度(0.10)和雄鹿(0.08)。所有山羊的平均活重为38±12 kg。除臀长外,所有线性体型测量均与体重显著相关(p<0.0001),其中胸围相关系数最高(r = 0.70)。本研究建立的育种目标和性状偏好提供了设计可持续育种计划所需的主要数据,必须纳入选择决策,以满足农民的偏好。关键词:育种目标,选择标准,排序,山羊改良,性状偏好。
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Goat farmers production objectives and trait preferences in the North West province of South Africa: An approach to identify selection criteria for community-based breeding program
Breeding practices and trait preferences are key to defining sound breeding objectives and designing genetic improvement programs at community level. The current study identifies these factors for village goats within a pilot community-based breeding program in Pella village, North West province, South Africa. Thirty-five farmers were interviewed using semi-structured questionnaire survey to characterize goat farmers’ production system. Breeding objectives were identified in 26 households using own flock ranking experiment and the body weight (kg) and linear measurements (cm) were collected for 10 best does and bucks. Majority of famers were males (83%) and literate (85.7%). Fifteen (43%) farmers owned a buck, and those that did not, relied on communal bucks. Average flock per household was 21±19. Farmer selling price for does was R1588.68±313.17 and bucks were sold for R1663.89±861.91. Body size traits were ranked high for both bucks (0.22) and does (0.10), followed by growth rate of 0.10 does and 0.08 for bucks. Average live body weight for all goats was 38±12 kg. Except for rump length, all linear body measurements studied were significantly correlated with body weight (p<0.0001) with chest girth having the highest correlation coefficient (r = 0.70). Breeding objectives and trait preferences established in this study provide primary data required to design a sustainable breeding program and must be incorporated into selection decisions to address farmer preferences. Key words: Breeding objectives, selection criteria, ranking, goat improvement, trait preference.
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