EVALUATION OF CHILLI (Capsicum annuun L.) GENOTYPES AND HYBRIDS AGAINST Fusarium WILT
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Date
2013-06-30
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UNIVERSITY OF AGRICULTURAL SCIENCES RAICHUR
Abstract
Among the 56 genotypes screened for resistance against F. solani, genotype P3 was found moderately resistant in both seed inoculation and rapid-root-dip–transplanting technique. None of the hybrids showed resistant reaction in rapid root dip transplanting technique and pot culture technique out of 38 hybrids. Hybrids namely, JNA2 x 9608D and Rajaput x P3 showed resistant in pot culture technique.
Analysis of variances showed that mean sum of squares due to genotypes were found to be highly significant for all the characters indicating significant variation among all the genotypes for all the characters. Phenotypic coefficient of variation was higher than their corresponding genotypic coefficient of variation for plant height, primary branches, secondary branches, closed stigma, number of fruits per plant, fruit length, fruit diameter, seeds per fruit, 1000 test weight, dry fruit weight, green fruit weight, green fruit weight per plant and dry fruit weight per plant revealed presence of environmental influence for the expression of these characters. High heritability estimates with high genetic advance as per cent mean for most of the characters viz., green fruit weight per fruit, dry fruit weight per fruit, fruit length, fruit diameter, number of primary branches, plant height, number of seeds per fruit, 1000 seed weight, green fruit weight per plant and dry fruit weight per plant revealed these characters are under the control of additive gene action. Hence, there is a greater scope for the improvement of these characters through selection.
Magnitude of genotypic correlation was greater than the corresponding phenotypic correlation. This lower phenotypic correlation results due to the masking effects and modifying effect of environment on the association of characters at the genic level. An examination of the path analysis revealed that contribution of days to fifty per cent flowering was found negative direct influence up on dry fruit yield per plant. However, number of fruits per plant exhibited high positive influence directly on dry fruit weight per plant. 23 genotypes and 5 hybrids of chilli were screened under natural infection epiphytotic condition for resistant against powdery mildew. Genotypes viz., P1 SUM, 5 SUM, LCA 310A, T2-1, BVC-1 and 9608U were least infested and classified as highly resistant. However, genotypes/hybrids namely, JCH 46, BVC-47 and KDC-1 showed resistance to fruit borer.
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