Resistance to Tomato spotted wilt virus introgressed from Lycopersicon peruvianum in line UPV 1 may be allelic to Sw-5 and can be used to enhance the resistance of hybrids cultivars |
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Authors: | Salvador Roselló Beatriz Ricarte María José Díez Fernando Nuez |
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Institution: | (1) Biotechnology Dept., Universidad Politécnica de Valencia (UPV), Cno. Vera, 14, 46022 Valencia, Spain |
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Abstract: | The breeding line UPV 1 developed from the PE-18 accession of Lycopersicon peruvianum collected in Huallanca, Ancash, Peru, shows resistance to TSWV. Mechanical inoculation and thrips transmission were used
to study the inheritance of TSWV resistance of this line. UPV 1resistance is controlled by a dominant gene. The penetrance
of this resistance gene was complete in mechanical inoculation and incomplete when thrips transmission was used. Linkage tests
between the resistance genes of lines UPV 1 and RDD (Sw-5), indicated allelism. A molecular analysis using a SCAR marker tightly linked to Sw-5 also supported this hypothesis. In heterozygotes the level of resistance expressed in UPV 1 is higher than that expressed
in RDD (Sw-5), indicating that the resistance from UPV 1 may be of higher value for the development of commercial hybrids.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | Frankliniella occidentalis inoculation methods SCAR TSWV |
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