Abstract
Breeding programs have sought to determine the minimum period of genotype evaluation, which is a long term-process. The objective of this work was to determine the association between qualitative traits of yellow passion fruit (Passiflora edulis Sims) and relate maturity to other characteristics. To carry out this work, 113 families of full-sibs and half-sibs were planted in Viçosa (MG), Brazil, in a randomized block experimental design arranged in sets (treatment groups). The association between the analyzed characteristics was studied using path analysis and canonical correlation techniques. It was found that lower-yielding but larger-fruit bearing genotypes of passion fruit plant also require more days until reaching anthesis. Round-shaped fruits are linked to higher contents of total soluble solids. More intense pulp color also indicates higher contents of total soluble solids. The riper the fruit, the more intensely orange is the color of the pulp. The ratio between the levels of total soluble solids and total titrimetric acidity was the main determinant of pulp color for passion fruit.
Highlights
Yellow passion fruit has drawn great interest from fruit producers, given its fast production cycle compared to other fruit species and high market demand for in natura consumption and industrialization, with whole juice emerging as the most economically important product within this trend [1]
With regard to the first canonical pair, it was demonstrated that genotypes of the passion fruit plant that needed more days until anthesis yielded less in the first flowering, produced larger fruits with lighter pulp weight
Lower-yielding and smaller passion fruit plant genotypes are characterized by requiring more days until anthesis
Summary
Yellow passion fruit has drawn great interest from fruit producers, given its fast production cycle compared to other fruit species and high market demand for in natura consumption and industrialization, with whole juice emerging as the most economically important product within this trend [1]. Passion fruit has wide acceptance due to its taste, aroma and quality of its juice, and is consumed in several forms. Fruit quality determines the acceptance of the product. Given the requirements set by producers and consumers, studying the correlations between gains in fruit traits is of great importance as it guides the future of breeding programs, by aiding in the improvement of several traits simultaneously. Several different biometric techniques are available to study the association between characteristics, such as canonical correlation and path analysis [8]
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