Physical mapping of NBS-coding resistance genes to the Me-gene cluster on chromosome P9 reveals markers tightly linked to the N gene for root-knot nematode resistance in pepper |
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| Authors: | Ibrahim Celik Mehmet Ali Sogut Ercan Ozkaynak Sami Doganlar Anne Frary |
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| Affiliation: | 1.Department of Molecular Biology and Genetics,Izmir Institute of Technology,Urla, Izmir,Turkey;2.Department of Plant Protection,Suleyman Demirel University,Isparta,Turkey;3.Yuksel Seeds Ltd.,Kiziltoprak, Antalya,Turkey |
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| Abstract: | Natural root-knot nematode resistance genes are unique resources to control this major pest in pepper (Capsicum annuum). Although four genes (Me1, Me3, Me7 and N) conferring broad-spectrum resistance were mapped to a cluster in a 28-cm interval on chromosome P9, limited markers targeting this region were available. In the present study, the Me-gene cluster was structurally annotated for resistance genes to develop markers targeting the N gene. As a result, the Me-gene cluster (4.07 Mb in size) was found to contain three resistance gene hotspots. In addition, a SSR maker tightly linked to the N gene (0.8 cM away) was developed for marker-assisted selection in pepper. |
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