Abstract
Bean anthracnose pathogen (Colletotrichum lindemuthianum) known to display high pathogenic variability, also explains the existence of large number of races in Himachal Pradesh. An evolution model based on virulence data of 29 C. lindemuthianum races and RAPD patterns revealed the existence of four evolutionary groups (EG I – EG IV) in Himachal Pradesh, accommodating 12, 14, 2 and 1 races, respectively. Some races viz., 935, 643, 529, 647 and 613, opted more than two evolutionary routes and races like 598, 707, 935, 631, 639, 615, 115 and 119 harbouring more than six virulence genes may pose a threat to bean cultivation in this part of the world as they can break many resistance genes present in the locally grown beans. However, two exotic accessions G 2333 and AB 136 resistant to all the Indian pathotypes could be exploited as resistance donors in developing anthracnose resistant cultivars suitable for cultivation in this region.
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