Rice Genotypes with SUB1 QTL Differ in Submergence Tolerance, Elongation Ability during Submergence and Re-generation Growth at Re-emergence
Rice Genotypes with SUB1 QTL Differ in Submergence Tolerance, Elongation Ability during Submergence and Re-generation Growth at Re-emergence
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DOI：
10.1007/s12284-011-9065-z
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发表时间：
2011-11-18
期刊：
影响因子：
5.5
通讯作者：
Bhattacharjee B
中科院分区：
文献类型：
--
作者：
Sarkar RK;Bhattacharjee B
耐淹性是短期洪水损害水稻的一个重要特性。鉴定出能够耐受 1-2 周淹没的耐受性地方品种。由于易发生洪水的生态系统的异质性，农民正在种植许多不同类型的传统水稻品种。适应极端水资源供应的当地品种可能是遗传变异的来源，可用于提高水稻对过量水分胁迫的适应性。在植物高度、伸长率和存活率、绝对生长率、非结构碳水化合物保留能力、叶绿素含量、不同叶绿素荧光参数（FP）特征以及重新出苗时的再生生长方面观察到更大的基因型变异性。与 14 天的淹没相比，20 天的淹没甚至对 1 号渗入品种（SUB1）造成的损害也更大。淹没结束时的 FP、碳水化合物含量和干重与再生生长呈正相关且高度显着相关。即使在更大伸长类型的水稻基因型中也注意到了 SUB1 相关引物（SC3 或 ART5）的存在。这些基因型具有易受洪水影响的生态系统所需的一种或多种适应性特征，包括从 1-2 周的暂时淹没到长期的静水耐受性。本文的在线版本 (doi:10.1007/s12284-011-9065-z) 包含补充材料，可供授权用户使用。
Submergence tolerance is an important trait where short term flash flooding damages rice. Tolerant landraces that withstand submergence for 1–2 weeks were identified. Due to the heterogeneity in flood-prone ecosystem many different types of traditional rice cultivars are being grown by the farmers. The local landraces adapted to extremes in water availability could be the sources of genetic variation are to be used to improve the adaptability of rice to excess water stress. Greater genotypic variability was observed for plant height, elongation and survival %, absolute growth rate, non-structural carbohydrate retention capacity, chlorophyll content, different chlorophyll fluorescence parameters (FPs) characteristics, and re-generation growth at re-emergence. Twenty days submergence caused greater damage even in Submergence 1 (SUB1) introgressed cultivars compared to the 14 days of submergence. The FPs, carbohydrate content and dry weight at the end of submergence showed positive and highly significant association with re-generation growth. The presence of SUB1 associated primers, either SC3 or ART5, was noticed even in greater elongating types of rice genotypes. These genotypes possess one or more of the adaptive traits required for the flood-prone ecosystem, which range from temporary submergence of 1–2 weeks to long period of stagnant water tolerance. The online version of this article (doi:10.1007/s12284-011-9065-z) contains supplementary material, which is available to authorized users.
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