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Selection of drought tolerant melon genotypes using Multivariate Statistical Methods and tolerance indices
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Hosein Astaraki    , Mahmoud Lotfi , Sasan Aliniaeifard , Ali Izadi-Darbandi , Payman Sharifi , Hossein Ramshini * |
| Department of Agronomy and Plant Breeding Sciences, College of Agricultural Technology (Abouraihan), University of Tehran, Pakdasht, Iran , ramshini@ut.ac.ir |
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Abstract: (121 Views) |
In order to select the most tolerant genotypes of melon to drought stress, 30 landraces and cultivars were evaluated at Broujerd Agricultural Research Station in 2018. Under normal and drought stress conditions genotypes were evaluated in a randomized complete block design with three replications. Drought stress was started when fruits appeared. Based on the rate of evaporation in class A evaporation pan (normal conditions: 50 mm, stress conditions: 100 mm), irrigation was carried out. The results of this study showed that Yield under drought stress and normal conditions showed high correlations with stress tolerance indices such as MP (Mean Productivity), GMP (Geometric Mean Productivity) and STI (Suitability Tolerance Index). The broad sense hereditary under drought stress condition varied from 81% for yield per plant to 97% for the fruit lenght. Under drought stress condition, the highest percentage of genetic coefficient of variation (GCV) was observed for Weight of flesh and skin (49 percent) and the lowest for days to maturity (4 percent). Based on the PCA biplot, the genotypes of Mamaghani, Rish-baba, Garmak and Japuni melon were identified as tolerant and Mazandrani, Uzbak1 and Ginsen Makuwa were classified as sensitive to drought stress. These results could be useful for breeding purposes and the genotypes can be crossed with each other to produce segregating populations and selection of the best plants. |
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| Keywords: Principal Component Analysis, Selection Broad Sense Heritability, Correlation |
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Type of Study: Research |
Subject:
Plant genetics
Accepted: 2024/03/6
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