Twenty-six rice landraces from West Bengal, India were evaluated for antixenosis and tolerance against brown planthopper (BPH) biotype 4 at the Bidhan Chandra Krishi Viswavidyalaya (BCKV), West Bengal. High levels of resistance were observed in six landraces, namely Badshabhog, Gamra, Haldichuri, Janglijata, Kalabhat and Khara. These phenotypically resistant rice landraces including Ptb33 exhibited lowest feeding rate, fecundity, nymphal and adult preference, survival, plant dry weight loss per mg of BPH dry weight produced (PDWL), and higher functional plant loss index (FPLI), more days to wilt and unhatched eggs compared with the susceptible check Swarna. All the landraces were classified into four major clusters at 10 unit distance by the scale of similarity during genetic diversity analysis through 21 gene-linked SSR markers of BPH resistance. Some phenotypically resistant landraces were gathered under the major cluster I indicating their analogous genetic history, while some were grouped with susceptible landraces exhibiting their genetic variation. The resistant landraces can be used as potential donors in the breeding programme for the development of rice varieties with resistance to BPH.

在西孟加拉邦的Bidhan Chandra Krishi Viswavidyalaya（BCKV）对来自印度西孟加拉邦的26个水稻地方品种进行了抗异种和对褐飞虱（BPH）生物型4的耐受性评估。在六个土生动物中观察到了高水平的抵抗力，它们分别是Badshabhog，Gamra，Haldichuri，Janglijata，Kalabhat和Khara。这些具有表型抗性的水稻地方品种（包括Ptb33）表现出最低的摄食率，繁殖力，若虫和成虫的偏爱，存活率，每毫克BPH干重产生的植物干重损失（PDWL）和更高的功能性植物损失指数（FPLI），更容易枯萎和未孵化的鸡蛋相比，易感的检查Swarna。通过对BPH抗性的21个基因相关SSR标记进行遗传多样性分析，根据相似性的大小，将所有地方种分为10个单位距离的四个主要类。在表型I下收集了一些具有表型抗性的地方品种，表明它们具有相似的遗传历史，而另一些则与表现出其遗传变异的易感地方品种一起分组。抗性地方品种可以作为育种计划的潜在捐助者，用于开发对BPH有抗性的水稻品种。