| genetic diversity of african and worldwide strains of ralstonia solanacearum as determined by pcr-restriction fragment length polymorphism analysis of the hrp gene region | the genetic diversity among a worldwide collection of 120 strains of ralstonia solanacearum was assessed by restriction fragment length polymorphism (rflp) analysis of amplified fragments from the hrp gene region. five amplified fragments appeared to be specific to r. solanacearum. fifteen different profiles were identified among the 120 bacterial strains, and a hierarchical cluster analysis distributed them into eight clusters. each cluster included strains belonging to a single biovar, except ... | 1999 | 10224018 |
| identification of qtls for ralstonia solanacearum race 3-phylotype ii resistance in tomato. | resistance against a ralstonia solanacearum race 3-phylotype ii strain jt516 was assessed in a f(2:3) and a population of inbred lines (ril), both derived from a cross between l. esculentum cv. hawaii 7996 (partially resistant) and l. pimpinellifolium wva700 (susceptible). resistance criteria used were the percentage of wilted plants to calculate the audpc value, and bacterial colonization scores in roots and stem (hypocotyl and epicotyl) assessed in two independent greenhouse experiments conduc ... | 2006 | 16614830 |
| resistance to bacterial wilt in somatic hybrids between solanum tuberosum and solanum phureja. | somatic hybrid plants were produced after protoplast electrofusion between a dihaploid potato, cv. bf15, and a wild tuber-bearing relative, solanum phureja, with a view to transferring bacterial wilt resistance into potato lines. a total of ten putative hybrids were selected. dna analysis using flow cytometry revealed that six were tetraploids, two mixoploids, one amphiploid and one octoploid. in the greenhouse, the putative hybrids exhibited strong vigor and were morphologically intermediate, i ... | 2000 | 11164589 |