ISSN:
1573-5060
Keywords:
Lycopersicon esculentum
;
processing tomato
;
heritability
;
pH
;
colour
;
soluble solids
;
choice of parents
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Summary The genetic basis of pH, colour and soluble solids in processing tomato is examined. In a first experiment, aimed at identifying the base populations with which to start selection, parents, F1 and F2 progenies of an 8 × 8 diallel cross without reciprocals were tested. The results indicate that additive, dominance and additive x additive epistatic effects were noticeable for the three characters. Higher order interlocus interactions were also detected. As to the soluble solids, a trait for which higher order epistatic effects were less marked, the breeding potential of the cross combinations was assessed by calculating the expected mean values at the F∞ generation. Some cross populations having ‘C33’ or ‘C35’ as parent appeared to be superior. A second experiment was conducted to collect data on the heritability of the foregoing qualitative traits by utilizing the regressions of F3 offspring on F2 parents. The low heritability coefficients observed would suggest the ineffectiveness of individual selection in early generations. In both the F2 and F3 generations rather low correlation coefficients among the three quality traits were observed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00036849
