Jansky S H, Rouse D I
Professor, Department of Biology, University of Wisconsin-Stevens Point 54481.
Professor, Department of Plant Pathology, University of Wisconsin-Madison 53706.
Plant Dis. 2003 Mar;87(3):266-272. doi: 10.1094/PDIS.2003.87.3.266.
Wild species of Solanum are excellent sources of disease resistance genes that may be incorporated into S. tuberosum through breeding. This study was initiated to determine whether multiple forms of disease resistance could be identified in interspecific Solanum hybrids. Thirty-two clones were evaluated for resistance to soft rot, common scab, black scurf, Verticillium wilt, and early blight. Most of the clones originated from populations that were not initially selected for disease resistance traits. Comparisons with the cultivars Atlantic, Russet Norkotah, and Russet Burbank indicated that all clones were more resistant than at least one cultivar for at least one disease resistance trait. Clone C545, which exhibited improved resistance to soft rot, scab, pitted scab, early dying disease, and early blight, appears to be an especially valuable source of disease resistance. The use of interspecific hybridization at the diploid level, combined with sexual polyploidization to return to the tetraploid level, provides a method to introduce multiple forms of disease resistance into advanced clones.
茄属野生种是抗病基因的优良来源，可通过育种将其整合到马铃薯中。开展本研究以确定是否能在茄属种间杂种中鉴定出多种抗病形式。对32个无性系进行了软腐病、普通疮痂病、黑痣病、黄萎病和早疫病抗性评估。大多数无性系来源于最初未选择抗病性状的群体。与品种大西洋、褐皮诺科塔和褐皮伯班克相比，表明所有无性系在至少一种抗病性状上比至少一个品种更抗病。无性系C545对软腐病、疮痂病、凹痕疮痂病、早死病和早疫病表现出更高的抗性，似乎是一种特别有价值的抗病资源。在二倍体水平进行种间杂交，结合有性多倍体化回到四倍体水平，提供了一种将多种抗病形式引入高级无性系的方法。
