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Inhertance of Four Quantitative Traits in Tomato (lycopersicon Esculentum Mill).

R.C. Brahma
Department of Genetics and Plant Breeding, Institute of Postgraduate Studies in Agriculture, Gazipur, Bangladesh.

A. Bhowmik
Department of Genetics and Plant Breeding, Institute of Postgraduate Studies in Agriculture, Gazipur, Bangladesh.

M. S. Ali
Department of Genetics and Plant Breeding, Institute of Postgraduate Studies in Agriculture, Gazipur, Bangladesh.

Abstract/ Executive Summary:

The inheritance of days to flowering, plant height, number of fruits per plant and fruit yield per plant were studied in the parental, Fl, F2, BC1 and BC2 generations of two crosses involving three parents. A six-parameter model was used to explain the various genetic effects. In Jap X CT1 the dominance effects were pronounced for days to flowering, plant height and number of fruits per plant. The additive x dominance gene effects were predominant for number of fruit per plant, The dominance x dominance type of interaction was relatively predominant In most of the cases. Heterosis were detected for all the characters studied.

Keywords: Lycopersicon esculentum, Inheritance, Quantitative traits.

Location: Department of Genetics and Plant Breeding, Institute of Postgraduate Studies in Agriculture, Gazipur

Start Date: 01-11-1986

End Date: 15-03-1987

Program Area: Variety and Species

Commodity: Tomato

Objectives:

To study the inheritance of days to flowering, plant height, number of fruits per plant and fruit yield per plant partitioning the genetic variance into additive (d),dominance (h) and digenic epistatic i.e. additive x additve (i), additive (j) and dominance (l).

Methodology:

The experimental material was Japanese (Jap), K7 and CT1 and F1, F2 and backcross generation s of two crosses viz. Jap x K7 and Jap x CT1, were used in the study. The seedlings were raised in the seed bed. Forty five day old seedlings of the parents, F o F2 and backcross generations of each cross were grown in winter 1986-87 in a randomized block design in three replications at the Institute of Postgraduate Studies in Agricult.cre (IPSA), Salna, Gazipur, Research Farm. Parents, F1s and backcrosscs were grown in two rows while the F2s were grown in four rows. Ten plants were planted in each row. Row to row distance was 75 em and plant to plant distance was 60 em .Data were collected on individual plants for days to flowering, plant height (em), number of fruits per plant and fruit yield per plant (kg). Data were analysed following Hayman 's (1958) and Gamble's (1962) six-parameter model for estimation of genetic components.

Source of Information: Annals B. Agric. 1 (1): 41 -43, 1991

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The estimates of six genetic parameters indicate a test for different types of gene actions and their importance in the breeding programme. The magnitude of additive and dominance effects for the characters studied in each of the crosses varied leading to the variation in the inheritance.

Knowledge Management: Journal