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What determines the success of stem borer herbivores in sorghum plant?

[論文タイトル]　Identification of quantitative trait loci associated with sorghum susceptibility to Asian stem borer damage

[著者]　Cyprian Osinde, Wataru Sakamoto, Hiromi Kajiya-Kanegae, Islam S. Sobhy, Arthur K. Tugume, Anthony M. Nsubuga, Ivan Galis

[掲載論文]　Journal of Plant Interactions, Vol 18 (1): Article: 2153182
https://doi.org/10.1080/17429145.2022.2153182

[内容紹介]
Stem borer insects attack stems and damage many plants, including sorghum – an important agricultural crop of African origin. In this collaborative study conducted with scientists from the Makerere University in Uganda, we examined damage from Asian stem borer in stems of sorghum plants growing in Japan. Subsequently, we identified two sorghum cultivars, one susceptible (NOG) and another resistant (BTx623), and used them for quantitative trait locus (QTL) analysis. It revealed that genetic regions (loci) on chromosomes 7 and 9 largely contribute to sorghum susceptibility, which leads to higher number of stem borer in stem, and more damage in NOG plants compared to resistant Btx623 genotype. At the same time, identified chromosomal regions overlapped with those involved in sorghum stem elongation and branching. Our results suggested that taller and more branched plants may be more likely targeted by stem borers than shorter and less branched individuals, which brings another set of questions for answering: Does a bigger plant mean (1) more spacious and (2) attractive apartment for stem borer insects? And, (3) how do insects measure plants?

[文責]　Ivan Galis

[共同研究]　International joint research

[使用した共同利用設備]　Experimental field

問い合わせ先：
Ivan Galis
Group of Plant-Insect Interactions