Tyagi Saniya, Narayana Srinivasa, Singh R N, Srivastava C P, Twinkle S, Das Sanat Kumar, Jeer Mallikarjuna
Department of Entomology and Agricultural Zoology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh 221005 India.
BRD PG College, Deoria, Uttar Pradesh, India.
3 Biotech. 2022 Oct;12(10):266. doi: 10.1007/s13205-022-03337-6. Epub 2022 Sep 8.
The brown planthopper, (Stål) is a major sucking insect pest of rice. This insect has long been considered as migratory; however, its route in India is still unknown. Hence, to find out its migration route genetic diversity, genetic structure and gene flow of 16 populations from major rice growing regions of India was studied based on mitochondrial cytochrome oxidase I (COI). The results revealed a high genetic homogeneity among the populations on the basis of genetic diversity statistics and neutrality tests. There was a prevalence of a single major haplotype across the country. No spatial relevance was found with the genetic structure of the populations indicating presence of excessive gene flow among them. Extensive gene flow among populations was also confirmed with the presence of higher number of immigrants in North, Central, and East India. To further clarify the migration sources, 48 h air-mass reverse trajectory was performed for Varanasi just aftermath of cyclones Amphan and Yaas, which disclosed Eastern/Northeastern states along with Bangladesh and Myanmar as the possible source areas. Overall, the results revealed a single panmictic homogeneous population of in India with extensive gene flow as a consequence of their migration. These findings will help in better forecasting enabling efficient regional management of this important rice pest.
The online version contains supplementary material available at 10.1007/s13205-022-03337-6.
褐飞虱（Nilaparvata lugens (Stål)）是水稻的一种主要刺吸式害虫。长期以来，这种昆虫一直被认为具有迁飞性；然而，其在印度的迁飞路线仍不为人知。因此，为了找出其迁飞路线，基于线粒体细胞色素氧化酶I（COI）对来自印度主要水稻种植区的16个种群的遗传多样性、遗传结构和基因流进行了研究。结果显示，根据遗传多样性统计和中性检验，各种群之间具有高度的遗传同质性。在全国范围内普遍存在单一的主要单倍型。未发现种群的遗传结构与空间因素相关，这表明它们之间存在过度的基因流。印度北部、中部和东部存在较多的迁入个体，这也证实了种群间存在广泛的基因流。为了进一步明确迁飞来源，在气旋“安攀”和“雅斯”过后，对瓦拉纳西进行了48小时的气团反向轨迹分析，结果显示东部/东北部各邦以及孟加拉国和缅甸可能是来源地。总体而言，结果表明印度的褐飞虱是一个单一的随机交配的同质种群，由于其迁飞导致了广泛的基因流。这些发现将有助于更好地进行预测，从而对这种重要的水稻害虫进行有效的区域管理。
在线版本包含可在10.1007/s13205-022-03337-6获取的补充材料。
