Molecular mapping of resistance to thrips in potato, Solanum tuberosum
1998
Galvez, H.F. | Hautea, D.M. (Philippines Univ. Los Banos, College, Laguna (Philippines). Inst. of Plant Breeding)
Among the staple food crops, potato ranks highest in nutritive value and productivity. Its major production constraint in the Philippine lowlands, however, is the severe occurrence of pests including thrips. Breeding for resistant varieties still provides the long term most effective strategy of control. Two Solanum tuberosum x S. berthaultii backcross populations (BCB and BCT) then have been developed and were evaluated for resistance to thrips under greenhouse condition. Appropriate statistical analysis was carried out and putative quantitative trait loci (QTLs) were located using the RFLP/RADP map of potato. Interval mapping by MAPMAKER/QTL software was employed and verified further by one-way ANOVA (P less than or equal to 0.05). One QTL on chromosome 8 in the BCD, and one QTL on chromosome 1 in the BCT were found to influence resistance. The QTLs accounted for 9-27 percent of the phenotypic variation observed, with the locus in the BCD consistently identified for all the resistance traits evaluated
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