Abstract
Inheritance of soluble solids and acidity and relationships between soluble solids, acidity, and other nine characters were studied in five F1 progenies of strawberry.
1. Soluble solids of most seedlings were within range of parental cultivars in four F1 progenies, whereas many seedlings with high soluble solids were observed in a progeny resulting from a cross between parents both having high soluble solids.
2. A mean soluble solids contents in each of F1 progenies was similar to or lower than mid-parental value. This result shows partial or incomplete dominance for the low soluble solids character.
3. A high frequency of F1 seedlings with low acidity was observed in progenies crossed between low-acid and high-acid parents. On the other hand, seedlings with higher or lower acidity than parents were observed in progenies crossed between low-acid parents.
4. Among the five F1 progenies, the means of acidity in four F1 progenies were nearly identical to or lower than mid-parental value. This suggests that the low-acid character is partially or incompletely dominant. However, the mean of acidity in one F1 progeny was higher than the parents, and this suggests heterosis for high acidity in some combinations.
5. The broad-sense heritabilities for both soluble solids and acidity are high. This suggests that there are large genetic variations for soluble solids and acidity in F1 progenies.
6. Negative correlations exist between soluble solids contents and yield (-0.33**--0.62**) or yield per 1, 000cm2 of leaf area (-0.43**--0.70**). On the other hand, positive correlations exist between soluble solids and plant height or leaf area.
7. Negative correlations exist between acidity and soluble solids-acid ratio (-0.58**--0.85**) and between acidity and yield (-0.01--0.43**) or yield per 1, 000 cm2 of leaf area (-0.04--0.46**).
8. In selecting seedlings possessing good flavor and high soluble solids, yield, leaf area and plant height should also be considered.
