| 摘要: |
| [目的]建立秦川牛开放核心群育种体系,分析开放核心群育种方案预期效果,为秦川牛育种方案的优化奠定基础.[方法]设定和分析了秦川牛群体育种学、生物学和经济学等基本参数,采用基因流动法和ZPLAN专用程序对开放核心群育种方案进行了研究.[结果]秦川牛开放核心群育种体系呈等级分明的金字塔型结构,其顶部为核心群,中部是育种群,基部是改良群.开放核心群育种方案平均世代间隔为5.26年,投入与产出比为1∶6.64. [结论]秦川牛开放核心群育种方案有很大改进余地,还有待进一步优化. |
| 关键词: 秦川牛 开放核心群育种体系 育种方案 体系建立 |
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| 基金项目:国家科技支撑计划农林动植物育种专项基金，农业部公益性行业科技专项基金，陕西省13115科技创新工程项目，西北农林科技大学拔尖人才支持计划 |
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| Study on establishment and basic parameters of open nucleus breeding system (ONBS) for Qinchuan beef cattle |
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| Abstract: |
| 【Objecttive】 The ONBS for Qinchuan cattle was established.The expected effect of open nucleus breeding plan was studied in order to lay an optimization foundation of breeding plan for Qinchuan cattle.【Method】 Basic parmeters from the perspective of breeding science,biology and economics about Qinchuan cattle were determined and analyzed.The breeding program was researched using gene flow method and ZPLAN special procedure.【Result】 This seed breeding system had a pyramid style structure including the core group,the breeding group and improvement group from top to bottom.Its average generation interval,and the ratio of cost and benefits were 5.26 years and 1∶6.64.【Conclusion】 The present project still has a big room for improvement and further optimization. |
| Key words: Qinchuan cattle open nucleus breeding system breeding plan system extablishment |
