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首页> 外文期刊>Plant Genetic Resources Characterization and Utilization >Molecular characterization and identification of new sources of tolerance to submergence and salinity from rice landraces of coastal India
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Molecular characterization and identification of new sources of tolerance to submergence and salinity from rice landraces of coastal India

机译：沿海印度水稻体育群体淹水和盐度新耐受性的分子特征及鉴定

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摘要

Trait-specific characterization of rice landraces has significant potential for germplasm management, varietal identification and mining of novel gene/allele for various traits. In the current study, we have characterized 98 unique rice landraces collected from coastal regions of India, affected by submergence and salinity, based on Sub1 and Saltol quantitative trait loci (QTL) linked microsatellite markers. Among these genotypes, four genotypes (IC536558, IC536559, IC536604 and IC536604-1) collected from Kerala and two genotypes (AC34902 and IC324589) collected from West Bengal were identified with tolerance to submergence and salinity stress. A high level of genetic diversity of H-e = 0.349 and 0.529 at Sub1 and Saltol QTL region was detected by QTL-linked microsatellite markers, respectively. At Sub1 region one genotype, AC34902, was detected with maximum allelic similarity with FR13A, a known submergence tolerant variety. Besides, five genotypes (IC211188-1, IC536604-1, IC536604, IC536558 and IC536559) showed comparatively close genetic relationship with the salt tolerant variety FL478 for Saltol QTL and were clustered together in the neighbour joining dendrogram. Considering the haplotype structure, five genotypes (IC203801, IC203778, IC324584, IC413608 and IC413638) were identified which did not contain any common allele similar to FR13A but were still tolerant to submergence. These individuals need further characterization for identification of new alleles responsible for their tolerance.
机译：水稻地球菌的特异性表征具有种质管理的显着潜力，新型基因/等位基因的种质管理，品种鉴定和挖掘，各种特征。在目前的研究中，我们的特征在于，基于Sub1和Saltol定量特性基因座（QTL）连接的微卫星标志物，其特征在于印度沿海地区，受到印度沿海地区的独特水稻地区。在这些基因型中，从喀拉拉邦收集的四种基因型（IC536558，IC536559，IC536604和IC536604-1）被从西孟加拉邦收集的来自西孟加拉邦的两种基因型（AC34902和IC324589）被耐受潜水和盐度应力鉴定。通过QTL连接的微卫星标志物分别检测H-E = 0.349和0.529的高水平遗传多样性。在Sub1区，一种基因型AC34902被检测到与FR13A的最大等位基因相似性，一种已知的浸没耐受性。此外，五个基因型（IC211188-1，IC536604-1，IC536604-1，IC536604-1，IC536558和IC536559）表现出与盐QTL的耐盐品种FL478相对紧密的遗传关系，并在邻居连接树形图中聚集在一起。考虑到单倍型结构，鉴定了五种基因型（IC203801，IC20378，IC32584，IC413608和IC413638），其不含类似于FR13A的任何常见等位基因，但仍然耐受淹没。这些人需要进一步表征，以确定负责其耐受性的新等位基因。

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