The Estimation of Combining Ability and Heterosis Effect for Yield and Yield Components in Tomato (Lycopersicon esculentum Mill.) at Lowland

Authors : Syarifah Iis Aisya, Sri Wahyuni, Muhammad Syukur, Joko Ridho Witono

Pages : 23-29

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Publication Date : 2016-01-01

Article Type : Research Paper

Abstract :A study was conducted in a 6 × 6 full diallel cross set of tomato including reciprocals to estimate the general combining ability, speciŞc combining ability and heterosis for yield per plant insert ignore into journalissuearticles values(g); and yield components, namely number of fruits per plant, individual fruit weight insert ignore into journalissuearticles values(g); fruit length insert ignore into journalissuearticles values(cm);, fruit diameter insert ignore into journalissuearticles values(cm);, locule number, and fruit thickness insert ignore into journalissuearticles values(cm);. The experiment was conducted from March to August 2013 at Bogor Agricultural University Experiment Field, BogorIndonesia. Randomized Complete Block Design was used with three replications. Data from Fl generation and parents were analyzed using the GrifŞng Method. SigniŞcant differences among genotypes were obtained for all the traits. The variances for general combining ability insert ignore into journalissuearticles values(GCA); and speciŞc combining ability insert ignore into journalissuearticles values(SCA); were highly signiŞcant indicating the presence of additive as well as non-additive gene effects except the fruit thickness. The tomato genotype IPB 78 is parental with the best general combining ability for yield per plant, individual fruit weight, fruit length, and fruit thickness. The tomato genotype IPB T73 x IPB T3 proved to be the best general combiner for yield and number of fruits per plant. The tomato genotype IPB T3 x IPB T1 proved to exhibit best heterosis for yield per plant and fruit thickness
Keywords : combining ability, diallel, GCA, heterosis, SCA