Genetic Divergence Studies for Quantative and Quality Traits in Tomato (Solanum lycopersicum L.)

Abstract

Abstract-

Heritable Variability and Multivariate Analysis for Physio-Morpho-Metric Traits in Tomato (Solanum lycopersicum L.)

“…While, the general mean value was highest and lowest for time of maturity and thickness of pericarp, respectively. High mean range reported for plant height, fruit weight, and flowering time in some previous studies (Singh et al, 2001;Ahmed et al, 2006;Shashikanth et al, 2010;Rani and Anitha, 2011;Spaldon and Kumar, 2017;Saravanan et al, 2019).…”

“…The highest heritability with high genetic advance for traits exhibited additive gene action and are very useful to plant breeder for making effective selection during breeding programs (Singh et al, 2001;Ahmed et al, 2006;Shashikanth et al, 2010;Mohamed et al, 2012;Reddy et al, 2013;Spaldon and Kumar, 2017). However, the lowest heritability and genetic advance are revealed non-additive (dominant or epistatic) gene action which barriers for tomato improvement through selection (Ahmed et al, 2006;Mohamed et al, 2012;Reddy et al, 2013;Saravanan et al, 2019).…”

“…Hence, the genetic variance of any morphometric or quantitative trait is indicated additive variance (heritable) and non-additive variance and comprise dominance and epistasis (non-allelic interaction) altered by environmental conditions (Iqbal et al, 2014;Kumar et al, 2017;Spaldon and Kumar, 2017). The present study was to identify the ToLCV and EB resistant cultivars, and to quantify the genetic variability, heritability, principal component analysis and genetic differences in tomato for physio-morphometric traits.…”

“…It has been claimed that from last two decades cultivated tomatoes characteristically have low genetic diversity, and losing of genetic heritability among the commercial tomatoes (Gonzalo and Knaap, 2008;Reddy et al, 2013). In this regard, it is necessary to partitioning of the total variability into heritable and non-heritable components and evaluated the genetic diversity among the various traits and to know the superiority of genetic advance after selection (Mohamed et al, 2012;Spaldon and Kumar, 2017;Nankar et al, 2020).…”

Agrupamento De Progênies De Diferentes Matrizes De Castanheira-Do-Brasil Quanto a Germinação E Desenvolvimento Inicial

“…A partir de então, avalia-se a possibilidade de inclusão de novos indivíduos, adotando-se o critério previamente citado (CRUZ; FERREIRA; PESSONI, 2011). Tal método tem sido amplamente utilizado para estudos de diversidade em diferentes espécies vegetais (RAVALI et al, 2017;SPALDON et al, 2017;SURYANARAYANA et al, 2017).…”