The flower bud thrips, Megalurothrips sjostedti Trybom (Thysanoptera: Thripidae), is an economically important pest of cowpea in sub‐Saharan Africa. Varietal resistance is the most preferred, environmentally friendly, cost‐effective and sustainable option for controlling this pest. The objective of this study was to identify sources of resistance to M. sjostedti among mini core accessions from the largest world cowpea germplasm collection maintained at the International Institute of Tropical Agriculture (IITA). The study was conducted during the 2015 and 2016 cropping seasons where 365 accessions were screened under field conditions. Each accession was rated visually for thrips damage score, flower abortion rate, number of pods per plant and number of thrips per flower. The resistance levels observed in genotypes TVu8631, TVu16368, TVu8671 and TVu7325 were similar to that of the resistant check “Sanzisabinli” (called Sanzi) during both seasons. In addition, 56 mini core genotypes showed moderate resistance to thrips damage. High heritability values were associated with thrips damage scores at 65 days after planting (0.60), percentage of effective peduncles (0.59), flower bud abortion rate (0.59), number of pods per plant (0.51) and number of peduncles with pods (0.5). The accessions identified with good levels of resistance to flower bud thrips will be used in cowpea breeding programs to develop improved resistant varieties.

中文翻译：

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豇豆迷你核心种质对花芽蓟马 Megalurothrips sjostedti Trybom（缨翅目：蓟马科）抗性的评价

花芽蓟马（Megalurothrips sjostedti Trybom）（缨翅目：蓟马科）是撒哈拉以南非洲地区豇豆的一种重要经济害虫。品种抗性是控制这种害虫的最优选、环保、具有成本效益和可持续的选择。本研究的目的是确定国际热带农业研究所 (IITA) 保存的世界最大豇豆种质库中的迷你核心种质中对 M. sjostedti 的抗性来源。该研究在 2015 年和 2016 年种植季节进行，在田间条件下筛选了 365 份材料。对每个种质的蓟马损害评分、花败育率、每株植物的豆荚数和每朵花的蓟马数进行视觉评级。在两个季节中，TVu8631、TVu16368、TVu8671和TVu7325基因型中观察到的抗性水平与抗性对照“散子萨宾里”（称为散子）相似。此外，56 个迷你核心基因型对蓟马损害表现出中等程度的抵抗力。高遗传力值与种植后 65 天的蓟马损害评分 (0.60)、有效花序梗百分比 (0.59)、花芽败育率 (0.59)、每株植物的豆荚数 (0.51) 和带豆荚的花序梗数 (0.5) 相关。 ）。经鉴定对花芽蓟马具有良好抗性的种质将用于豇豆育种计划，以开发改良的抗性品种。