Guzzo E C, Vendramim J D, Chiorato A F, Lourenção A L, Carbonell S A M, Corrêa O M B
Embrapa Tabuleiros Costeiros, Cx Postal 2013, 57061-970, Maceió, AL, Brasil.
Depto de Entomologia e Acarologia, ESALQ, Univ de São Paulo, Piracicaba, SP, Brasil.
Neotrop Entomol. 2015 Dec;44(6):619-25. doi: 10.1007/s13744-015-0315-4. Epub 2015 Aug 8.
Resistance of common bean (Phaseolus vulgaris) varieties is an important tool to control Acanthoscelides obtectus (Say) and Zabrotes subfasciatus (Boheman) (Coleoptera: Chrysomelidae: Bruchinae) worldwide. However, bioassays to characterize the resistance of a genotype can be difficult to perform. Therefore, the current study sought to correlate the morpho-agronomic traits of P. vulgaris genotypes with their resistance to A. obtectus and Z. subfasciatus to facilitate genotype characterization. Bean samples of each genotype were infested with newly emerged insect couples, and the number of adults obtained in each genotype was quantified (value used as a resistance parameter). The resistance index was calculated by dividing the number of adults obtained in each genotype by the one obtained in the cultivar Bolinha, used as the standard for susceptibility. Fifty genotypes were evaluated for A. obtectus and 202 for Z. subfasciatus. All genotypes were characterized according to their resistance to each insect and 18 other morpho-agronomic traits, for a total of 19 descriptors. Principal component analyses did not show any correlation between insect resistance and the morpho-agronomic traits of the genotypes. Further, the thousand seeds weight (TSW), which is indicative of the genotype center of origin was tested considering genotypes from Mesoamerican with low TSW, while those from Andean with high TSW. Thus, the lack of correlation between genotype resistance and TSW indicates that resistance to A. obtectus and Z. subfasciatus in P. vulgaris is not related to the host center of origin.
普通菜豆（Phaseolus vulgaris）品种的抗性是全球控制菜豆象（Acanthoscelides obtectus (Say)）和巴西豆象（Zabrotes subfasciatus (Boheman)）（鞘翅目：叶甲科：豆象亚科）的重要手段。然而，用于表征基因型抗性的生物测定可能难以进行。因此，本研究旨在将普通菜豆基因型的形态农艺性状与其对菜豆象和巴西豆象的抗性相关联，以促进基因型的表征。每个基因型的豆类样本用新羽化的昆虫配对进行侵染，并对每个基因型中获得的成虫数量进行量化（该值用作抗性参数）。抗性指数通过将每个基因型中获得的成虫数量除以在用作感病标准的Bolinha品种中获得的成虫数量来计算。对50个基因型进行了菜豆象抗性评估，对202个基因型进行了巴西豆象抗性评估。根据所有基因型对每种昆虫的抗性以及其他18个形态农艺性状进行了表征，共计19个描述符。主成分分析未显示昆虫抗性与基因型的形态农艺性状之间存在任何相关性。此外，考虑到中美洲低千粒重的基因型和安第斯高千粒重的基因型，对指示基因型起源中心的千粒重（TSW）进行了测试。因此，基因型抗性与TSW之间缺乏相关性表明，普通菜豆对菜豆象和巴西豆象的抗性与宿主起源中心无关。
