Abstract
The shifting of tomatoes cultivation from upland to lowland led to a significant decrease of tomatoes production, particularly on tomatoes varieties which are not able to adapt to lowland. Genotypes selection based on appropriate selection criteria is the most effective method to obtain tomatoes genotypes with high production in the lowland. The aim of this study was to determine appropriate selection criteria in the lowland based on high heritability value, high phenotype and genotype correlation to production component, and character relationship closeness with production component through path analysis. This study used a randomized block design with three replications. Selection criteria was chosen based on high heritability value, significant correlations in phenotype and genotype and its high direct impact on fruit weight per plant which were the number of fruits per plant and weight per fruit characters
Highlights
Tomatoes cultivation in Indonesia is grown in upland with percentage of 60% while the remaining 40% in lowland
Purwati (2009) reported that yield of tomato hybrid adaptive to lowland and upland grown on medium land (550 m asl) was only 1.95 kg plant1, while the yield potential could reach 3 kg plant-1 or 35% decrease in yield
In order to perform simultaneous selection, the used character for selection criteria must be chosen based on heritability value and closeness relationship to the desired character (Yunianti, Sastrosumarjo, Sujiprihati, Surahman, & Hidayat, 2010; Mustafa, Syukur, Sutjahjo, & Sobir, 2017)
Summary
Tomatoes cultivation in Indonesia is grown in upland with percentage of 60% while the remaining 40% in lowland. The study aimed to select yield component characters based on the correlation, cross-coefficient, and heritability it can be used to develop selection index for the yield performance of 30 tomato populations in the lowland. 20 IPBT63 Brastagi3 Tomato fruit, big slightly oval
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