Genetic analysis of resistance to pepper anthracnose caused by Colletotrichum capsici
2002
Qing Lin | Chutchamas Kanchana-udomkarn | Jaunet, Thierry | Orarat Mongkolporn
Inheritance of the resistance to anthracnose, caused by Colletotrichum capsici, was studied in Capsicum annuum L. populations established from a cross between accession '83-168', and cv. 'KKU-Cluster'; and their progenies in F sub(1)s, F sub(2)s and BC sub(1)s. The resistance was evaluated by inoculating mature green fruits with a 6-micro l drop of 10**(6) conidia/ml suspension after making a wound with a 0.1-cm length needle. Reciprocal effects were not present. Two phenotypic classes, resistant and susceptible, were determined based on the numbers of fruits infected at four days after inoculation (DAI). The segregation of resistance to susceptibility appeared to be 3:1 in the F sub(2)s and 1:1 in the BC sub(1) (F sub(1) x KKU-Cluster). This indicated that one dominant gene was responsible for the resistance to C. capsici in the breeding line '83-168' at 4 DAI.
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