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20111
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Subject: Others × End date: 2013 × Start date: 2011 × Type: Thesis × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    Genetic analysis of yield, its components and fruit quality traits in chilli (Capsicum annuum L.).”
    (PAU Ludhiana, 2011) Parvinder Singh; Devinder Singh, Cheema
    The present investigations were conducted from April 2008 to August 2010 at the Department of Vegetable Crops, Punjab Agricultural University, Ludhiana. Twelve diverse chilli genotypes (CC141, MS341, SL461, SL462, DL161, EL181, US501, PA401, SD463, PP402, PS403 and VR521) selected on the basis of per se performance were crossed in diallel fashion (excluding reciprocals) to produce 66 F1 hybrids. These 66 F1 hybrids along with twelve parental genotypes and two commercial checks CH-1 and MH-1 (Soldier) were evaluated in the field during two consecutive years, in randomized complete block design (RCBD) with three replications, for yield and quality parameters. Highly significant and desirable heterosis over the better parent and standard checks were observed for almost all the characters in both the years. Analysis of variance for combining ability showed highly significant mean squares due to GCA and SCA for all the characters in both the years indicated the involvement of both additive and non-additive gene effects in the inheritance of these traits. The ratio of σ2 SCA/ σ2 GCA was less than unity for days to flowering, early yield, fruit number, fruit length, number of seeds fruit-1, plant height, plant spread, total fruit yield, chilli powder yield, dry matter content, oleoresin content, oleoresin yield and incidence of anthracnose, indicated additive gene action for these traits, while non-additive gene effects were important for fruit width, fruit weight, pericarp thickness, capsaicin in powder and in oleoresin, coloring matter in powder and in oleoresin and incidence of leaf curl virus. SL461 and DL161 were considered as the best general combiners for early and total yield. Moreover, these parents also showed desirable GCA effects for many other traits especially the quality traits viz. chilli powder yield, dry matter content, capsaicin in powder and in oleoresin, coloring matter in powder and in oleoresin, oleoresin content and oleoresin yield. Other good general combiners for different characters included SD463, PP402, US501, MS341, SL462, PS403 and CC141. The graphical analysis (Wr/Vr) showed that most of the traits exhibiting partial dominance and overdominance. Components of variance analysis revealed that both additive and dominance gene effects were important for inheritance of traits under study. Degree of dominance showed that most of the traits exhibited overdominance. The cross combination US501×SD463, showed significant and desirable SCA effects for days to flowering, early yield, fruit length, fruit weight, number of seeds fruit-1, total fruit yield, coloring matter in powder and in oleoresin, oleoresin yield and reaction to anthracnose. Other promising crosses for different traits were SD463×VR521, SL461×PP402, MS341×SL461, SL462×US501, CC141×VR521, SD463×PP402, SL461×PS403, SL462×EL181, SL461×DL161, MS341×US501, SL461×SL462, SL461×SD463, PP402×VR521 and CC141×PP402. It was suggested that heterosis and pedigree breeding methods with recurrent selection would facilitate simultaneous exploitation of the obtained genetic components in hot pepper improvement program.