Journal
SCIENTIA HORTICULTURAE
Volume 174, Issue -, Pages 126-132Publisher
ELSEVIER
DOI: 10.1016/j.scienta.2014.05.019
Keywords
Fruit shape; Fruit size; QTL; Malus domestica
Categories
Funding
- Hi-Tech Research and Development (863) Program of China [2011AA001204]
- National Special Funds for Scientific Research on Public Causes (Agriculture) Project [200903044]
- Modern Agricultural Industry Technology System (Apple) [CARS-28]
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Nutrition and Physiology), Ministry of Agriculture, P. R. China
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Fruit size and shape are important external quality traits in commercial crops. To determine the genetic relationship between the size and shape of apple fruits, quantitative trait lad (QTLs) for apple size (average weight), length, diameter, and shape (length/diameter ratio) were identified and mapped in progeny of a 'Jonathan' x 'Golden Delicious' cross. Fruit size, length, and diameter followed a normal distribution. There was no correlation between apple size and shape, but both variables were significantly correlated with length and diameter. Forty-five QTLs for apple size, length, diameter, and shape were mapped to 13 chromosomes of the two parent cultivars. Of these, 12 QTLs for fruit length and diameter either overlapped or were closely associated with QTLs for fruit size, whereas three co-localized with QTLs for fruit shape. No QTLs for fruit size mapped to the same or neighboring regions as QTLs for fruit shape, suggesting that size and shape are under independent genetic control. (C) 2014 Elsevier B.V. All rights reserved.
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