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首页> 外文期刊>Pakistan journal of botany >Genetic analysis of basmati and non-basmati Pakistani rice (Oryza sativa L.) cultivars using microsatellite markers
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Genetic analysis of basmati and non-basmati Pakistani rice (Oryza sativa L.) cultivars using microsatellite markers

机译：利用微卫星标记对印度香米和非印度香米（Oryza sativa L.）品种进行遗传分析

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Information of genetic variability and relatedness among rice genotypes is essential for future breeding programmes and derivation of superior cultivars. The objective of the present study was to evaluate the genetic relationship among traditional and improved cultivars of Pakistani rice and to determine differences in the patterns of variation between two indica rice groups: basmati and non-basmati. Forty-one cultivars were evaluated by means of 30 microsatellite markers distributed over the whole rice genome. A total of 104 alleles were detected by 30 markers, all of them (100%) were polymorphic. The number of alleles generated by each marker ranged from 2 to 6 with an average of 3.5 alleles marker-1. Polymorphism information content (PIC) varied from 0.259 to 0.782 with an average of 0.571. A significant positive correlation (r = 0.71**) was found between the number of alleles at SSR locus and the PIC values. Pair-wise Nei and Li's similarity coefficients ranged from 0.10 to 0.99. A dendrogram based on cluster analysis by microsatellite polymorphism grouped 41 rice cultivars into 2 major groups effectively differentiating the late maturing, tall and slender-grain basmati and other aromatic rice cultivars from the early, short statured, short bold and long bold grain non-aromatic cultivars. Higher level of genetic diversity between basmati and non-basmati support the concept that former had a long history of independent evolution and diverged from non-basmati rice a long time ago through human selection and patronage. Present investigation further indicated that genetically basmati rice is different from that of coarse indica and japonica type. The results suggested that microsatellite markers could efficiently be utilized for diversity analysis, and differentiation of basmati and non-basmati rice cultivars. In addition, marker-based identification of traditional basmati rice may help in maintaining the integrity of this high quality product to the benefit of both farmers and consumers.
机译：水稻基因型之间遗传变异和相关性的信息对于未来的育种计划和优良品种的推导至关重要。本研究的目的是评估巴基斯坦水稻传统品种和改良品种之间的遗传关系，并确定印度in米和非印度m米两个groups稻品种的变异模式差异。通过在整个水稻基因组中分布的30个微卫星标记对41个品种进行了评估。通过30个标记共检测到104个等位基因，它们（100％）都是多态性的。每个标记生成的等位基因数量在2到6之间，平均3.5个等位基因marker-1。多态信息含量（PIC）从0.259到0.782，平均为0.571。在SSR基因座的等位基因数量与PIC值之间发现显着正相关（r = 0.71 **）。成对的Nei和Li的相似系数在0.10到0.99之间。基于聚类分析的树状图，通过微卫星多态性将41个水稻品种分为两个主要组，有效地将晚熟，高粒细巴巴马香米和其他芳香稻品种与早期，短粒，短粗体和长粗体非芳香族区别开来品种。印度香米和非印度香米之间较高的遗传多样性支持这样一个概念，即前者具有悠久的独立进化历史，并且很久以前就通过人类的选择和光顾与非印度香米分离开来。目前的研究进一步表明，转基因印度香米与粗in型和粳型不同。结果表明，微卫星标记可以有效地用于巴斯马蒂和非巴斯马蒂水稻品种的多样性分析和分化。此外，基于标记的传统印度香米的鉴定可能有助于保持这种高质量产品的完整性，从而对农民和消费者都有利。

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