Genetics of Resistance to Anthracnose in Chilli (Capsicum annuum L.)
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Date
2017-12
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University of Agricultural Science, Dharwad
Abstract
The present study was undertaken in chilli crop at Department of Genetics and Plant Breeding, UAS, Dharwad during 2013-15 to study the inheritance pattern for anthracnose disease resistance in the two crosses derived from Byadgi Kaddi and two resistant lines GPM 288-1 and GPM 302-1. Further variability, character association and genetics of yield and component traits were studied. Efforts were also made to demonstrate breeding possibilities of using interspecific hybridization between Capsicum chinense and Capsicum annuum.
Segregation pattern in the F2 exhibited ratio of 1:3, indicating that anthracnose disease resistance is governed by single recessive gene, which was further confirmed by segregation ratio of 1:1 in B1 backcross population. The F3 families showing resistance needs to be advanced to further generations to develop inbreed lines with anthracnose disease resistance. High heritability coupled with high genetic advance over means was observed for plant height, number of primary branches, number of secondary branches, number of fruits and dry fruit yield per plant in both the populations. In Byadgi Kaddi GPM 288-1 and Byadgi Kaddi GPM 302-1 populations, association of number of fruits per plant and fruit pericarp weight with dry fruit yield per plant was highly positive and significant. Higher estimates for colour, oleoresin and capsaicin content in all F3 lines were noticed. The F1 seeds of cross of C. chinense × C. annuum were incompatible as their hybrid expressed hybrid weakness such as VLS (virus-like syndrome). The presence of significant dominance dominance type of gene interaction for most of the traits studied indicated that these traits can be utilized in the exploitation of heterosis.