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首页> 外文期刊>Genetic Resources and Crop Evolution >Genetic diversity and origin of Japonica- and Indica-like rice biotypes of weedy rice in the Guangdong and Liaoning provinces of China
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Genetic diversity and origin of Japonica- and Indica-like rice biotypes of weedy rice in the Guangdong and Liaoning provinces of China

机译：广东和辽宁省杂草稻粳型和and型水稻生物型的遗传多样性和起源

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摘要

Weedy rice has been becoming a notorious weed in the paddy field of China in recent decades due to its increasing damage to rice yield and rice quality. In this study, a microsatellite technique with 21 pairs of SSR markers was utilized to estimate the genetic structure of two biotypes of weedy rice with Japonica and Indica rice characteristics, collected from Liaoning and Guangdong provinces, respectively. The genetic diversity of the weedy rice in the two provinces was relatively low (Liaoning h = 0.086; Guangdong h = 0.160), and distinctly large genetic differences existed between these two provinces (Gcs = 0.623). The genetic diversity was found primarily within populations, and genetic differentiation was relatively low within the same province. Both cluster analysis (UPGMA) and principle component analysis (PCA) showed that weedy rice had a closer relationship with the cultivated rice collected from the sample field than with other cultivated rice and common wild rice varieties in China. Thus, the results of this study on samples from the Liaoning and Guangdong provinces in China support the de-domestication hypothesis that weedy rice most probably originated from local cultivated rice.
机译：近几十年来，由于杂草稻对水稻产量和稻米质量的损害越来越大，它已成为中国稻田中臭名昭著的杂草。在这项研究中，利用具有21对SSR标记的微卫星技术，分别估算了分别来自辽宁和广东两省的两种具有粳稻和In稻特性的生物型水稻的遗传结构。两个省的杂草稻的遗传多样性相对较低（辽宁h = 0.086；广东h = 0.160），并且这两个省之间存在明显的较大遗传差异（Gcs = 0.623）。遗传多样性主要存在于种群中，而同一省内的遗传分化相对较低。聚类分析（UPGMA）和主成分分析（PCA）均表明，杂草稻与从样品田采集的栽培稻的关系比与中国其他栽培稻和普通野生稻品种的关系更紧密。因此，本研究来自中国辽宁省和广东省的样本的结果支持了非驯化假说，即杂草稻很可能起源于本地栽培稻。

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