Entomology Program, Department of Agricultural Biotechnology, Seoul National University, Seoul, Republic of Korea.
Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea.
PLoS One. 2021 Mar 26;16(3):e0248819. doi: 10.1371/journal.pone.0248819. eCollection 2021.
Bemisia tabaci Mediterranean (Gennadius) (Hemiptera: Aleyrodidae) is an economically important insect pest worldwide. Previously, we have reported that most B. tabaci Mediterranean (MED) populations occurring in greenhouse tomatoes in Korea have been displaced from well-differentiated two genetic clusters (C1 and C2) to one (C2) during one-year period. To elucidate factors responsible for this phenomenon, we compared life history parameters of these two different genetic clusters through single and cross mating experiments on two different host plants, cucumber and tobacco, at 26°C. Intrinsic rate of increase (r), finite rate of increase (λ), and net reproductive rate (Ro) were significantly higher in the dominating cluster (C2) (0.247, 1.280, and 192.402, respectively on cucumber; 0.226, 1.253, and 133.792, respectively on tobacco) than in the other cluster (C1) (0.149, 1.161, and 50.539, respectively on cucumber; 0.145, 1.156, and 53.332, respectively on tobacco). Overall performances of cross mating groups, C2fC1m (C2 female × C1 male) and C1fC2m (C1 female × C2 male), were in-between those of C2 and C1, with C2fC1m performing better than C1fC2m. Thus, maternal inheritance appeared to be significantly associated with their life history parameters, with partial involvement of paternal inheritance. Our results demonstrated that the rapid displacement of genetic clusters of B. tabaci MED populations was clearly associated with differences in their life history parameters.
烟粉虱地中海型（Gennadius）（半翅目：粉虱科）是世界范围内一种具有重要经济意义的昆虫害虫。此前，我们曾报道过，在韩国温室番茄中发生的大多数烟粉虱地中海型（MED）种群，在一年内已从分化良好的两个遗传群（C1 和 C2）转变为一个（C2）。为了阐明导致这种现象的因素，我们通过在 26°C 下对两种不同的宿主植物（黄瓜和烟草）进行单交和杂交实验，比较了这两个不同遗传群的生活史参数。在黄瓜上，主导群（C2）的内禀增长率（r）、有限增长率（λ）和净生殖率（Ro）分别显著高于其他群（C1）（分别为 0.247、1.280 和 192.402；分别为 0.226、1.253 和 133.792）。在烟草上，C2 的表现也优于 C1（分别为 0.149、1.161 和 50.539；分别为 0.145、1.156 和 53.332）。交叉交配组（C2fC1m，即 C2 雌×C1 雄；C1fC2m，即 C1 雌×C2 雄）的综合表现介于 C2 和 C1 之间，C2fC1m 的表现优于 C1fC2m。因此，母性遗传与它们的生活史参数明显相关，同时存在部分父性遗传的参与。我们的结果表明，烟粉虱 MED 种群遗传群的快速取代与它们生活史参数的差异明显相关。
