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首页> 外文期刊>Turkish Journal of Botany >Identification of stable sources for surrogate traits in Arachis glabrata and marker-trait association for tolerance to water deficit stress
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Identification of stable sources for surrogate traits in Arachis glabrata and marker-trait association for tolerance to water deficit stress

机译：鉴别 Arachis glabrata 代代性状的稳定来源和耐旱性的标记性状关联

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摘要

Diploid and tetraploid wild relatives of cultivated peanut are genetically diverse, providing rich sources of genetic resources for tapping resistance to various biotic and abiotic stresses. Arachis glabrata Benth. is a tetraploid (2n = 40) rhizomatous species that is reported to be tolerant to water deficit stress. Identification of A. glabrata accessions with high SPAD chlorophyll meter reading (SCMR) and low specific leaf area (SLA) values would be an option for improving water deficit stress tolerance in peanut. An investigation was undertaken to study the genetic diversity of A. glabrata accessions using molecular markers as well as surrogate traits (SLA and SCMR) for water deficit stress to identify stable sources for SCMR and to identify DNA markers linked to SCMR. SCMR showed high heritability and genetic advance as percent of mean (GAM) and a negative relation with SLA in A. glabrata. High heritability and high GAM indicates additive gene action. A high level of genetic diversity was observed in A. glabrata accessions, indicating that these populations had not experienced major genetic bottlenecks or genetic drift. Eight random amplified polymorphic DNA markers were identified with significant association to SCMR.
机译：栽培花生的二倍体和四倍体野生近缘种具有遗传多样性，为挖掘对各种生物和非生物胁迫的抗性提供了丰富的遗传资源。花生。是四倍体（2n = 40）根茎种，据报道可耐受水分亏缺胁迫。具有较高SPAD叶绿素计读数（SCMR）和较低比叶面积（SLA）值的毛苔草种质鉴定将是提高花生水分亏胁迫耐受性的一种选择。进行了一项调查，以利用分子标记以及水分亏缺的替代特征（SLA和SCMR）研究光滑拟南芥种质的遗传多样性，以鉴定SCMR的稳定来源并鉴定与SCMR相关的DNA标记。 SCMR显示出较高的遗传力和遗传进展，为平均数（GAM）的百分数，并且与A. glabrata中的SLA呈负相关。高遗传力和高GAM表示累加基因作用。在glabrata种中观察到高水平的遗传多样性，表明这些种群没有经历主要的遗传瓶颈或遗传漂移。确定了八个随机扩增的多态性DNA标记与SCMR显着相关。

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