Resilient Agricultural Livelihood Systems Program (RALSP), International Center for Agricultural Research in the Dry Areas (ICARDA), PO Box 5689, Addis Ababa, Ethiopia.
Emergency Center for Transboundary Animal Diseases, FAO, PO Box 5536, Addis Ababa, Ethiopia.
Animal. 2020 Jul;14(7):1362-1370. doi: 10.1017/S1751731120000269. Epub 2020 Feb 26.
Community-based breeding programs (CBBPs) for small ruminants have been suggested as alternatives to centralised, government-controlled breeding schemes which have been implemented in many developing countries. An innovative methodological framework on how to design, implement and sustain CBBPs was tested in three sites in Ethiopia: Bonga, Horro and Menz. In these CBBPs, the main selection trait identified through participatory approaches was 6-month weight in all three sites. In Horro and Bonga, where resources such as feed and water permitted larger litter sizes, twinning rate was included. Ten-year (2009 to 2018) performance data from the breeding programs were analysed using Average Information Restricted Maximum Likelihood method (AI-REML). Additionally, the socioeconomic impact of CBBPs was assessed. Results indicated that 6-month weight increased over the years in all breeds. In Bonga, the average increase was 0.21 ± 0.018 kg/year, followed by 0.18 ± 0.007 and 0.11 ± 0.003 kg/year in Horro and Menz, respectively. This was quite substantial in an on-farm situation. The birth weight of lambs did not improve over the years in Bonga and Horro sheep but significant increases occurred in Menz. Considering that there was no direct selection on birth weight in the community flock, the increased weights observed in Menz could be due to correlated responses, but this was not the case in Bonga and Horro. The genetic trend for prolificacy over the years in both Bonga and Horro flocks was positive and significant (P < 0.01). This increase in litter size, combined with the increased 6-month body weight, increased income by 20% and farm-level meat consumption from slaughter of one sheep per year to three. The results show that CBBPs are technically feasible, result in measurable genetic gains in performance traits and impact the livelihoods of farmers.
社区主导的小反刍动物繁殖计划(CBBP)已被提议作为许多发展中国家实施的集中式、政府控制的繁殖计划的替代方案。在埃塞俄比亚的三个地点邦加、霍罗和门兹测试了一种关于如何设计、实施和维持 CBBP 的创新方法框架。在这三个 CBBP 中,通过参与式方法确定的主要选择特征是所有三个地点的 6 个月体重。在霍罗和邦加,由于资源(如饲料和水)允许更大的产仔数,因此包括孪生率。使用平均信息限制最大似然法(AI-REML)对繁殖计划的十年(2009 年至 2018 年)性能数据进行了分析。此外,还评估了 CBBP 的社会经济影响。结果表明,所有品种的 6 个月体重在这些年都有所增加。在邦加,平均增长率为 0.21±0.018kg/年,其次是霍罗的 0.18±0.007kg/年和门兹的 0.11±0.003kg/年。在农场环境下,这是相当可观的。博加和霍罗绵羊的羔羊初生重多年来没有提高,但门兹羔羊的初生重显著增加。考虑到社区羊群中没有对初生重进行直接选择,门兹绵羊观察到的体重增加可能是由于相关反应,但博加和霍罗的情况并非如此。多年来,博加和霍罗羊群的繁殖力遗传趋势是积极且显著的(P<0.01)。产仔数的增加,加上 6 个月体重的增加,使收入增加了 20%,每年从一只羊的屠宰中增加到三只羊的农场级肉类消费。结果表明,CBBP 在技术上是可行的,可导致生产性能性状的可衡量遗传增益,并影响农民的生计。