AN EXTENDED LINKAGE MAP OF SUGAR-BEET (BETA-VULGARIS L) INCLUDING 9 PUTATIVE LETHAL GENES AND THE RESTORER GENE-X
AN EXTENDED LINKAGE MAP OF SUGAR-BEET (BETA-VULGARIS L) INCLUDING 9 PUTATIVE LETHAL GENES AND THE RESTORER GENE-X
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DOI：
10.1111/j.1439-0523.1993.tb00641.x
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发表时间：
1993-12-01
期刊：
影响因子：
2
通讯作者：
JUNG, C
中科院分区：
文献类型：
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作者：
PILLEN, K;STEINRUCKEN, G;JUNG, C
提出了甜菜 (Beta vulgaris L.) 的扩展遗传图谱，其中包含 9 个连锁群上的 177 个分离标记（2 个形态性状、7 个同工酶和 168 个 RFLP 标记）。连锁图包括 1057.3 cM，相当于 6.0 cM/标记的平均通用间距。各个连锁基团的长度在 80.7（第 VIII 组）和 167.4 cM（第 VII 组）之间变化。每个连锁群的标记数量在 13 到 24 之间。没有发现重复区域的迹象，证实了 B. vulgaris 的真正二倍体性质。 26 个标记 (15%) 显着偏离 (α = 0.01) 预期分离率。这种扭曲的分离可能是由与致死基因的连锁引起的。四个这样的基因（指定为 Let 1b、Let 5b、Let 6b、Let 8）可能位于离散位置，因为它们与倾斜的 RFLP 标记绝对连锁。恢复基因 X 位于连锁群 III 的末端，距 RFLP 标记 pKP1238 9.6 cM。
An extended genetic map of sugar beet (Beta vulgaris L.) is presented encompassing 177 segregating markers (2 morphological traits, 7 isozymes, and 168 RFLP markers) on 9 linkage groups. The linkage map comprises 1057.3 cM equivalent to an average generic spacing of 6.0 cM/marker. The length of individual linkage groups varies between 80.7 (group VIII) and 167.4 cM (group VII). The number of markers per linkage group ranges between 13 and 24. No indication of duplicate regions was found, con firming the true diploid nature of B. vulgaris. Twenty-six markers (15%) deviated significantly (alpha = 0.01) from the expected segregation ratio. This distorted segregation was probably caused by linkage with lethal genes. Four such genes (designated Let 1b, Let 5b, Let 6b, Let 8) could be located at discrete positions due to their absolute linkage to skewed RFLP markers. The restorer gene X has been located terminally on linkage group III, 9.6 cM distant from RFLP marker pKP1238.