Genetic diversity analysis and construction of selection index of selected tomato genotypes

Abstract

To study the genetic variability and selection index of selected tomato genotypes, an experiment was conducted at the farmer's field of Chirirbandar Upazilla of Dinajpur District, Bangladesh. Ten tomato genotypes were evaluated in a randomized completely block design with four replications. The study results displayed high heritability plus higher genetic advance for all the traits studied. Among the traits, plant height showed high genotypic and phenotypic coefficients of variation over other traits. Yield per plant alone had 100% expected genetic gain and the relative effectiveness of the other functions was calculated in like manner. Selection indices exhibit eight traits association (yield plant-1 with plant height, canopy width, days to flowering, fruit diameter plant, fruit length, single fruit weight), and therefore the number of marketable fruit is simpler for genetic improvement thanks to the most expected genetic gain (665.23) with maximum relative efficiency (125.88%). Based on the selection index value and total rank value for selection criteria, the eight-traits combined with V6 and V10 are the promising genotypes that can be used as potential gene donor for further breeding program.

Response of Different Tomato Accessions to Biotic and Abiotic Stresses

“…Total soluble solids (TSS) content is the most important quality measurement for tomato processing. Consequently, soluble solids content or acidity (pH), can be considered for tomato selection (Ahmet and Seniz, 2009).…”

“…These minerals directly effect on pH and titratable acidity which influence the taste of tomatoes. Free amino acids form about 2 -2.5% of the total dry matter of tomatoes (Ahmet and Seniz 2009).…”

Evaluation to Select Tomato Genotypes with Big Fruit and Verification of Genetic Advance

“…Index selection is one of the selection methods for multiple characters commonly used in addition to tandem selection and independent culling [9,10]. Hazel and Lush [11] and Lin [12] investigated the relative efficacy of tandem selection, independent culling levels, and index selection.…”