Cytoplasmic diversity in potato breeding: case study from the International Potato Center
Cytoplasmic diversity in potato breeding: case study from the International Potato Center
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DOI：
10.1007/s11032-015-0326-1
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发表时间：
2015-06-01
影响因子：
3.1
通讯作者：
Bonierbale, Merideth
中科院分区：
文献类型：
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作者：
Mihovilovich, Elisa;Sanetomo, Rena;Bonierbale, Merideth
对CIP马铃薯育种种质的细胞质多样性进行了分析。对265份国外种质、642份CIP育成的育种系和71份CIP材料育成的品种共978个基因型进行了细胞质类型分析。我们发现T（45%）、D（38%）和W（11%）是CIP育种种质中最常见的细胞质类型。与CIP育种系相比，T型细胞质频率从64%下降到38%，而D型和W型细胞质频率分别从26%和6%增加到41%和14%。我们的结论是CIP育种计划，因为世界各地的许多其他人，经历了一个遗传瓶颈的细胞质多样性方面，由于无意中和连续使用的基于细胞质的雄性不育母系来自Solanum demissum和S。匍匐茎在亲本系和品种发育中作用。然而，雄性可育T型育种系的发现一定程度上缓解了这一问题，从而使CIP育种取得进展。
We analyzed the cytoplasmic diversity of CIP potato breeding germplasm. Cytoplasm types were assigned to 978 genotypes consisting of 265 foreign accessions used as input germplasm, 642 breeding lines developed by CIP, and 71 varieties released from CIP material. We found T (45 %), D (38 %), and W (11 %) to be the most frequent cytoplasm types in CIP breeding germplasm. Comparing the initial input germplasm to CIP breeding lines, the frequency of T-type cytoplasm decreased from 64 to 38 %, while those of D-and W-type cytoplasms increased from 26 to 41 % and from 6 to 14 %, respectively. We conclude that the CIP breeding program, as many others worldwide, has experienced a genetic bottleneck in terms of cytoplasmic diversity due to the unintended and continuous use of cytoplasmic-based male-sterile maternal lineages derived from Solanum demissum and S. stoloniferum in parental line and variety development. Nonetheless, the finding of male-fertile T-type breeding lines must have alleviated the problem to a certain extent, thus enabling CIP breeding progress.