Extending the rapeseed genepool with resynthesized Brassica napus L. I: Genetic diversity
Extending the rapeseed genepool with resynthesized Brassica napus L. I: Genetic diversity
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DOI：
10.1007/s10722-011-9772-8
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发表时间：
2012-10-01
影响因子：
2
通讯作者：
Becker, Heiko C.
中科院分区：
文献类型：
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作者：
Girke, Andreas;Schierholt, Antje;Becker, Heiko C.
重新合成的甘蓝型油菜可以增加狭窄油菜基因库的遗传变异，并为杂交育种建立遗传远距基因库。选择合适的再合成系的一个重要标准是它们与适应育种材料的遗传距离。本研究利用RFLP标记对来自欧洲、北美和亚洲的142个再合成品系和57个冬春油菜品种的遗传距离进行了估计。142个再合成品系的群内遗传距离最高，为0.36，而冬季为0.21，夏季为0.23，亚洲基因型为0.28。适应性育种材料群分为冬季型、春季型和亚洲型三组。聚类分析显示，再合成系与适应油菜基因库的遗传距离存在较大差异，但未形成明显的亚群。与冬季油菜的距离最高的系系为来自亚洲基因库的甘蓝（B. oleracea convar）。灰霉病太阳或B. rapa ssp。对(l)Hanelt。
Resynthesized Brassica napus L. could be employed to increase the genetic variation in the narrow oilseed rape genepool and to establish a genetically distant genepool for hybrid breeding. One important criterion for selecting appropriate resynthesized lines is their genetic distance to adapted breeding material. In this study we estimated the genetic distances in a wide collection of 142 resynthesized lines and 57 winter and spring rapeseed cultivars from Europe, North America and Asia using RFLP marker data. The highest in-group genetic distance (0.36) was observed in 142 resynthesized lines compared to 0.21 in winter, 0.23 in summer, and 0.28 in Asian genotypes. The group of adapted breeding material clustered into three groups of winter-, spring-type, and Asian genotypes. Resynthesized lines did not form distinct subgroups in the cluster analysis, but large differences were revealed in the genetic distance of resynthesized lines to the adapted winter oilseed rape genepool. The highest distance to winter oilseed rape was found in resynthesized lines with parental lines from the Asian genepool as B. oleracea convar. botrytis var. alboglabra (Bail.) Sun or B. rapa ssp. chinensis (L.) Hanelt.