The Root-Knot Nematode Resistance Gene Mi-1.2 of Tomato Is Responsible for Resistance Against the Whitefly Bemisia tabaci
作者： Gloria Nombela , Valerie M. Williamson , Mariano Muñiz
DOI: 10.1094/MPMI.2003.16.7.645
关键词: PEST analysis 、 Botany 、 Macrosiphum euphorbiae 、 Cultivar 、 Whitefly 、 Aphid 、 Root-knot nematode 、 Solanaceae 、 Genetically modified crops 、 Biology 、 Agronomy and Crop Science 、 Physiology 、 General Medicine
摘要: The tomato gene Mi-1.2 confers resistance against root-knot nematodes and some isolates of potato aphid. Resistance to the whitefly Bemisia tabaci previously has been observed in Mi-bearing commercial tomato cultivars, suggesting that Mi, or a closely linked gene, is responsible for the resistance. The response of two biotypes of B. tabaci to tomato carrying the cloned Mi was compared with that of the isogenic untransformed tomato line Moneymaker. Our results indicate that Mi-1.2 is responsible for the resistance in tomato plants to both B- and Q- biotypes. Mi-1.2 is unique among characterized resistance genes in its activity against three very different organisms (root-knot nematodes, aphids, and whiteflies). These pests are among the most important on tomato crops worldwide, making Mi a valuable resource in integrated pest management programs.
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