Identification and molecular cytology analysis of cold tolerance introgression lines derived from Oryza sativa L. mating with O-rufipogon Griff.

文献类型： 外文期刊

第一作者： Luo, Xiang-Dong

作者： Luo, Xiang-Dong;Dai, Liang-Fang;Cao, Juan-Fang;Jian, Shui-Rong;Chen, Ya-Ling;Xie, Jian-Kun;Hu, Biao-Lin

作者机构：

关键词： Introgression;Cold tolerance;Meiosis;Chromosome recombination

期刊名称：EUPHYTICA （ 影响因子：1.895； 五年影响因子：2.181 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： A previously constructed introgression lines (ILs) population including 239 lines was used to evaluate the cold-tolerant ability. The ILs with strong cold tolerance which were identified in the present study were used for further cytological and microsatellite (SSR) marker analyses. The results showed that the IL5243 and IL5335 had strong cold-tolerant ability. Cytological analysis showed that the rate of pollen mother cells (PMCs) with normal meiotic behavior in the IL5243 and IL5335 was to 89.93 and 90.22 %, respectively, and finally formed normal mature pollen. And meanwhile, the low frequency of abnormal chromosome behavior was observed in the IL5243 and IL5335, such as univalent, 8-shape bivalent, multivalent at diakinesis. At anaphase I, one or two lagging chromosomes were observed in some PMCs (3.95-5.15 %). The results of SSR marker analysis further confirmed that partial alien DNA of common wild rice has been transferred into the IL5243 and IL5335. These results implied that the IL5243 and IL5335 might be excellent bridging germplasm for exploring and utilizing the cold-tolerant gene of common wild rice. In addition, IL5243 and IL5335 would provide a better experimental system for understanding some epigenetic phenomenon induced by alien gene introgression.

分类号： S3

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