Combining Ability Analysis for Yield and Quality Traits in Tomato (Solanum lycopersicum L.)

Abstract

Thirteen parental lines were crossed in line X tester fashion comprising 10 lines and 3 testers at vegetable farm Banaras Hindu University Varanasi to estimate combining ability in tomato for fruit yield, yield components and fruit quality traits. F₁ and parents were grown in towards four and half meters in randomized block design with three replications during winter-2010 involvement of both additive and non additive gene action was operated for the control of fruits per plant, fruit weight and average fruit weight. All the fruit quality characters like, total soluble solids (TSS), titratable acidity, ascorbic acid and lycopene of the fruit were governed by non additive gene action. In most of the traits, over-dominance was predominant. The analysis of components of genetic variance for yield components showed that the main part of genetic variance was due to additive effect. Estimation of general combining ability (GCA) for yield and earliness showed that Pant T-3 had the highest GCA for increasing yield and Punjab Upma had the highest GCA for both earliness and average fruit weight. Cross combination CO-3 X Azad T-5 exhibit significant specific combining ability (SCA) for the most of desirable traits among all cross combinations

Combining Ability and Gene Action Studies in Some Genetic Stocks of Tomato (Solanum lycopersicum L.)

“…Similar findings were also reported by Kapur et al, (2013) for days to 50 per cent flowering and harvest duration; by Kumari and Sharma (2012) for number of fruits per cluster and fruit yield per plant; by Saeed et al, (2014) for number of marketable fruits per plant; by Kumar et al, (2015) for average fruit weight, number of locules per fruit and pericarp thickness; by Saleem et al, (2013) for plant height and days to marketable maturity; by Kumar et al, (2013) for ascorbic acid content. Therefore, for improving these traits, heterosis breeding will be most practical.…”

“…Our result contradicted with the finding of Kumar et al, (2015), who reported non-additive gene action for total soluble solids content. Moreover, our results indicated dominant gene action for Alternaria resistance.…”

“…No cross combinations were found significant for harvest duration. Similar general and specific combiners for different traits of tomato were earlier identified by Kumar et al, (2015) while working with ten lines and four testers in tomato.…”

Combining Ability and Gene Action Studies for Grain Yield and Yield Contributing Traits in Wheat (Triticum aestivum L.)

“…The estimates of general combining ability (gca) and specific combining ability (sca) variances and their ratio of (δ 2 gca/δ 2 sca) was less than unity for all characters studied in present investigation, which indicates that preponderance of nonadditive type of gene action. These findings are in general agreements with those of Seboka et al, (2009), Singh et al, (2012, Bhaghyalaxmi et al, (2015) and Kumar and Kerkhi (2015).…”

Enhancement of post harvest fruit quality and leaf curl disease tolerance in tomato through hybrid breeding

“…Not many findings were available on the genetic control of post harvest fruit quality traits and leaf curl disease severity in tomato. The importance of non-additive gene action for the conditioning of fruit weight (Shende et al, 2012), TSS (Chattopadhyay et al, 2011), fruit acidity (Chattopadhyay et al, 2011), vitamin C content of fruit (Kumar et al, 2013), lycopene content of fruit and percent disease index (PDI) of ToLCV disease (Dharmatti et al, 2004), and fruit yield plant -1 (Shende et al, 2012;Sherpa et al, 2014) have also earlier been reported. The equal importance of both additive and non-additive gene actions for the control of polar diameter of fruit (Hazra and Nath, 2008), equatorial diameter of fruit and locules fruit -1 (Mondal et al, 2009) have also been documented.…”