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Relationships of parental combining ability and test cross segregation to breeding productivity in tomato lycopersicon esculentum



Relationships of parental combining ability and test cross segregation to breeding productivity in tomato lycopersicon esculentum



Journal of the American Society for Horticultural Science 108(3): 487-491



Crosses between 6 inbreds of tomato (L. esculentum Mill.) and each of 2 hybrid testers, and progenies derived from them by single seed descent (SSD), were grown in replicated trials in 1980 and 1981. Early yield, total yield and fruit size means of the inbred parents were correlated with estimates of general combining ability (GCA); strong relationships also were found among midparent, GCA, and testcross means and means of SSD derived lines. These relationships were especially evident for fruit size, a trait of moderately high heritability. GCA was corerlated with progeny segregation for fruit size and for early yield; but only for fruit size was a significant correlation found between testcross segregation and similar data for SSD progenies.

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Accession: 006303284

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