Indian Society of Genetics & Plant Breeding

Genetic control of fruit yield and quality characters in tomato genotypes possessing hp-1, ogc, dg, Aft and rin genes

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Five inbred lines of tomato possessing one each of the
specific genes viz., hp-1, ogc, dg, Aft and rin were crossed
in a half diallel fashion to determine the combining ability
and gene action of fruit yield/plant, fruit weight and eight
important fruit quality characters. Additive genetic
component was predominant for TSS, ascorbic acid and
anthocyanin contents; both additive and non-additive
components was important for fruit yield/plant, fruit weight
and lycopene content, and non-additive gene action was
overwhelmingly important for pericarp thickness and total
sugar content while estimates of both the genetic
components was zero for titrable acidity and b-carotene
content of fruit. General combining ability effects of the
parents corresponded well to their per se performance.
Homozygous recessive condition of the genes, hp-1, ogc,
dg governed enhanced lycopene content in the fruits.
Homozygous Aft/Aft plant had higher anthocyanin content
in the fruit than the heterozygous plant indicating additivity
of the Aft gene in expressing the character. The hybrid of
two widely divergent parent BCT-115 dg/ dg x Alisa Craig
Aft/Aft emerged as outstanding for both fruit yield and
quality which also opened up the possibility of developing
tomato hybrid rich in both lycopene and anthocyanin
contents. The hybrid BCT-115 dg/ dg x BCT-111 rin/ rin was
also promising for commercial utilization.

Keywords: Combining ability, gene action, single gene, lycopene, anthocyanin, tomato


Year: 2016
Volume: 76
Issue: 3
Article DOI: 10.5958/0975-6906.2016.00049.3
Print ISSN: 0019-5200
Online ISSN: 0975-6906


A. Chattopadhyay info_circle
P. Hazra info_circle

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