Correlations in Strawberry Breeding Programs

Breeding value of selected dessert strawberry (Fragaria × ananassa Duch.) cultivars for ripening time, fruit yield and quality

“…In an earlier study by Masny et al (2010a), additive genetic correlation coefficients for the pair of traits: fruit firmness and fruit weight, estimated within the population of repeat-fruiting hybrids, had a positive value (0.69-0.76). By contrast, Hansche et al (1968) and Hortyński (1989), studying the genetic correlations between these traits, obtained values of the correlation coefficient that were close to zero. Thus suggesting that the degree of interdependence of the genetic effects of the two traits is subject to modification, depending upon the composition of the gene pool being studied.…”

“…Trait inheritance of this type has been found for fruit ripening time (Hortyński 1987;Masny et al 2008), fruit weight (Masny et al 2014), fruit firmness (Hansche et al 1968;Barritt 1976), and ascorbic acid content in strawberries (Lundergan and Moore 1975). Genetic correlations of additive effects for functional traits in strawberry have been studied by Hortyński (1987Hortyński ( , 1989 and Masny et al (2010a). The highest positive GCA correlation coefficients were estimated for pairs of traits such as: fruit ripening time and fruit weight, fruit weight and the colour of fruit flesh, fruit weight and fruit firmness, and fruit firmness and colour (skin and flesh) (Masny et al 2010a).…”

“…The highest positive GCA correlation coefficients were estimated for pairs of traits such as: fruit ripening time and fruit weight, fruit weight and the colour of fruit flesh, fruit weight and fruit firmness, and fruit firmness and colour (skin and flesh) (Masny et al 2010a). On the other hand, the close to zero genetic correlation between fruit firmness and fruit size, and between fruit firmness and the number of fruit suggests no relationship between these pairs of traits (Hortyński 1987(Hortyński , 1989.…”

Fungicide Resistance in Botrytis spp. and Regional Strategies for Its Management in Northern European Strawberry Production

“…These could provide a more solid foundation for effective chemical and non-chemical approaches than the current cultivars, many of which are highly susceptible in northern Europe. Fruit firmness has been shown to correlate inversely with the incidence of grey mould in ripe fruits [89]. A test method for grey mould susceptibility based on the inoculation of ripe fruits has been developed.…”