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首页> 外文会议>Proceedings of the 12th International Rapeseed Congress: Sustainable Development in Cruciferous Oilseed Crops Production >Create and broaden the germplasm pool of B. napus through interspecific hybridization between B. carinata and B. rapa
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Create and broaden the germplasm pool of B. napus through interspecific hybridization between B. carinata and B. rapa

机译：通过Carinata和B. rapa之间的种间杂交建立和扩大B. napus的种质库

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lnterspecific hybridization is an important way to transfer desirable traits from one species to another, and has created new breeding resources in Brassica crops. B. carinata (BBCC, 2n=34) possesses lots of desirable agronomic characters which are rare in the other Brassica oilcrops. To make such good characters flow in the genus Brassicas, a great deal of crosses between B.carinata and B. rapa (AA, 2n=20) have been made. In total, 326 interspecific combinations were obtained involving 109 accessions of B. carinata and 29 accessions of B. rapa. In result, about five thousand true hybrid plants (ABC) were obtained after identified morphologically as well as molecularly. To restore the fertility ofthe triploid interspecific hybrids, the putative hybrids were treated with 0.1% colchicines and result in 276 combinations of hexaploid plants (AABBCC). These hexaploid plants can be used as a gene pool to cross the B. napus and broaden the geraplasm of B. napus. In the meanwhile, Great differences on the interspecific crossability were found among interspecific combinations and female parents. Sixteen accessions of B. carinata with high crossability were originally collected from the same place, southeast of the Great Rift Valley in Ethiopia. The significance of interspecific crossability is discussed.
机译：种间杂交是将理想性状从一个物种转移到另一个物种的重要途径，并已在芸苔属作物中创造了新的育种资源。 B. carinata（BBCC，2n = 34）具有许多理想的农艺特性，而在其他芸苔属油料作物中则很少见。为了使这种优良的性状在芸苔属中流动，已经在卡氏芽孢杆菌和R. rapa之间进行了大量杂交（AA，2n = 20）。总共获得了326种种间组合，其中包括109种Carinata的种和29种B. rapa的种。结果，通过形态和分子鉴定，获得了约五千个真正的杂种植物（ABC）。为了恢复三倍体种间杂种的育性，将推定的杂种用0.1％秋水仙碱处理，得到276种六倍体植物组合（AABBCC）。这些六倍体植物可用作基因库，可以跨越油菜（B. napus）并拓宽油菜（B. napus）的种质。同时，种间组合与雌性亲本间的种间可交性差异很大。最初从埃塞俄比亚大东非大裂谷东南部的同一地方收集了十六种具有高可交叉性的B. carinata品种。讨论了种间可交叉性的重要性。

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