Abstract

GABRIEL, Julio et al. Genetic basis of inheritance for morphological, agronomic and agro-industries characteristics in hybrid tomato Solanum lycopersicum L. (Mill). J. Selva Andina Biosph. [online]. 2013, vol.1, n.1, pp.45-54. ISSN 2308-3867.

In this research, 16 hybrids of tomato were evaluated under greenhouse and laboratory with the aim of estimating genetic variances, general combining ability (GCA) of male, specific combining ability (SCA) from each cross and the heritabilities for morphological, agronomics, agri-industries and resistance characteristics.  Results showed a large variability for evaluated characters, defining that additive and non-additive effects as well as dominant were involved in the same. Platus and Rio Grande varieties had a higher General Combining Ability (GCA) to yield.  San Marzano variety showed the highest values for weight loss and a lower Brix degree values. Platus and Rio Grande showed the highest values of GCA for a lower fruit hardness loss and a lower pH value.  The Martha x 89R Sw-5/Sw-5 and San Marzano x 895 Laching Sw-5 crosses had the highest values of Specific Combining Ability (SCA) to yield, suggesting that these combinations had hybrid vitality for yield, lower weight loss, Brix and pH degrees. The inheritance was greater for size, width, shape, hardness, number of locules and fruit brix degrees.

Keywords : Inheritance; genes; additive effects; dominant effects; genetic variances; yield.

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