CD Skripsi
Pendugaan Keragaman Genetik Karakter Agronomi Pada Beberapa Genotipe Tanaman Tomat (Solanum Lycopersicum L.)
ABSTRACT
Tomato (Solanum lycopersicum L.) is an important commodity in Indonesia, yet its productivity in Riau Province remains low due to cultivation challenges in lowlands with high temperatures. Plant breeding programs aimed at developing superior adaptive lowland varieties represent a potential solution. Breeding success depends on genetic diversity, heritability, and selection response of agronomic characters. This study aimed to determine the components of genetic diversity, heritability values, and selection responses of seven tomato genotypes in the lowlands.The research was conducted using a Randomized Complete Block Design (RCBD) with three replications. Observed parameters included flowering age, harvest age, plant height, stem diameter, fruit weight per fruit, fruit stalk length, fruit length, fruit diameter, fruit flesh thickness, number of fruits per plant, and fruit weight per plant. Data were analyzed using SAS application variance analysis, 5% Honestly Significant Difference (HSD) advanced test, and estimation of diversity values, heritability, and selection response.The results showed that all characters tested had narrow genetic diversity. Characters with high heritability included harvest age (60%), plant height (66%), stem diameter (81%), fruit stalk length (60%), fruit length (92%), fruit diameter (73%), fruit flesh thickness (69%), number of fruits per plant (77%), and fruit weight per plant (80%). The characters number of fruits per plant (12.54), fruit length (21.11), plant height (31.20), and fruit weight per plant (364.70) showed high selection responses, indicating the effectiveness of these four characters as selection criteria in breeding programs to obtain superior pure lines.
Keywords: Genetic Diversity, Heritability, Plant Breeding, Selection Response, Tomato
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