ISHS Acta Horticulturae 663: XI Eucarpia Symposium on Fruit Breeding and Genetics
INHERITANCE OF ORGANOLEPTIC QUALITY TRAITS OF APRICOT |
| Authors: | V. Signoret, S. Bureau, M. Reich, B. Gouble, G. Clauzel, G. Albagnac, J.M. Audergon |
| Keywords: | diallel design, quantitative genetics, selection strategy, anova, fruit weight, firmness, sugar and acid contents |
| Abstract:
Apricot is the third most important stone fruit consumed in France. Apricot’s image is good, but its appreciation is intermediate in consumer studies. Thus an improvement of fruit quality is needed. Five varieties chosen for their contrasting phenotypic traits, were crossed following a diallel cross design: ‘Bergeron’ with high fruit weight and blush (red skin colour) contributing to the attractiveness, ‘Polonais’ with high sensory quality, ‘Moniqui’ with very high quality and high sugar content, ‘Goldrich’ with high fruit weight and firmness and ‘Stark Early Orange’ with good firmness because of thick skin and resistance to Plum Pox Virus. Six progenies from ‘Bergeron’ x ‘Moniqui’, ‘Bergeron’ x ‘Polonais’, ‘Bergeron’ x ‘Goldrich’, ‘Polonais’ x ‘Moniqui’, ‘Polonais’ x ‘Bergeron’ and ‘Polonais’ x ‘Stark Early Orange’ (SEO) crosses have been investigated for primary metabolite (sugars and acids) content and physical traits (weight and firmness), and compared to their parents, in order to characterize the genetic variability and mode of inheritance of these traits. Acid content and fruit weight were stable over years. An important interaction between genotype and environmental conditions was shown for sugar content and fruit firmness. The variation of the traits was continuous suggesting a polygenic inheritance. Our study highlighted that the investigated traits are genetically independent. Unlike peach, no correlation was detected either between reducing sugars and sucrose contents or between sugar and acid contents. The genetic knowledge/features of the fruit quality traits examined showed that an efficient selection should be possible. | |
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