New Zealand Journal of Crop and Horticultural Science
abstracts
Transgressive segregation for fruit quality traits in a cross between exotic
and mutant genotypes of Lycopersicon
Gustavo R. Rodríguez
Guillermo R. Pratta
CONICET
Cátedra de Genética
Facultad de Ciencias Agrarias
Universidad Nacional de Rosario
CC 14 (S2125ZAA)
Rosario, Santa Fe, Argentina
email:grodrig@fcagr.unr.edu.ar
Roxana Zorzoli
Liliana A. Picardi
CIUNR
Cátedra de Genética
Facultad de Ciencias Agrarias
Universidad Nacional de Rosario
CC 14 (S2125ZAA)
Rosario, Santa Fe, Argentina
Abstract A cross between a Lycopersicon esculentum accession
carrying the mutant nor and an accession of L. esculentum var. cerasiforme was
made to analyse the joint genetic effect upon the phenotypic segregation of
some fruit quality traits in the F2 generation. Fruit from the F1, F2,
and the parents (as testers) were evaluated for shelf life and another quality
traits. Because of the presence of individuals falling beyond their parental
phenotypes in the F2, a transgressive inheritance was estimated by a chi-square
test. Transgressive inheritance was present for relevant traits such as shape,
colour, firmness, and shelf life. The broad sense heritability values were
highly significant for all traits and the shelf life was not associated with
any other fruit quality trait. The use of this wild accession as a parent in
tomato breeding programmes becomes an alternative for increasing fruit quality
and especially prolonging the fruit shelf life.
Keywords Lycopersicon esculentum var. cerasiforme; nor;
plant genetic resources;shape;shelf life; tomato
New Zealand Journal of Crop and Horticultural Science, 2005, Vol. 33:
373–379
0014–0671/05/3304–0373 © The Royal
Society of New Zealand 2005
H04087; Online publication date 9 November 2005
Received 22 October 2004; accepted 3 April 2005
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