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- Title
SCREENING OF CAPSICUM ANNUUM L. GENOTYPES FOR DROUGHT TOLERANCE BASED ON DROUGHT TOLERANC INDICES.
- Authors
ROSMAINA; PARJANTO; SOBIR; YUNUS, A.
- Abstract
The use of drought-tolerant cultivars is the most effective approach to cope with the drought stress in chili pepper production. The objectives of the present research were to assess the tolerance indices, and to identify the drought tolerance in 55 curly pepper genotypes. The performance of 55 chili pepper genotypes was screened and compared under drought stressed and non-stress environments using randomized complete blocks design (RCBD) with four replications during 2016 at Sultan Syarif Kasim State Islamic University, Riau, Indonesia. Based on the yield under stress (YS) and non-stress environment (YNS), fourteen indices of the drought tolerance were formulated. Correlation analysis revealed that yield under stress condition had no significant correlation with the yield under non-stress environment indicating high stress intensity. Therefore, the STI (Stress Tolerance Index), GMP (Geometric Mean Productivity), HM (Harmonic Mean), and MP (Mean productivity) indices could not be used as indicator to screen the drought tolerance in curly pepper genotypes. The principal component analysis showed that SSI and SDI indices were found more reliable as tolerance indicators for selection of droughttolerant genotypes in chili pepper genotypes. Subsequently, bi-plot and cluster analyses separated the 55 chili pepper genotypes into three groups, the first cluster (tolerant group) consisted of the three genotypes i.e. UIN-RFC010, UIN-GM107, and UIN-RFC006, second cluster (semi-tolerant or semi-sensitive genotypes) comprising 11 genotypes i.e. UIN-RFC011, UIN-RFC015, UIN-GK065M, UINRFC002, UIN-GM102, UIN-GK073, UIN-GK071, UIN-RFC019, UIN-RFC014, UINGK072, and UIN-GK098, while the rest of the genotypes were classified into the third cluster (susceptible group). Results further revealed that SSI and SDI indices could be used as selection indicators in curly pepper if the stress conditions are severe. The drought tolerant genotypes identified in this research could be utilized in future breeding program for further improvement in curly pepper.
- Publication
SABRAO Journal of Breeding & Genetics, 2019, Vol 51, Issue 3, p205
- ISSN
1029-7073
- Publication type
Academic Journal