ISHS Acta Horticulturae 588: II International Symposium on Cucurbits
BREEDING OF SUPPRESSED-BRANCHING MELON LINE 'MELON CHUKANBOHON NOU 4' ('MELON PARENTAL LINE 4') AND ITS CHARACTERISTICS |
| Authors: | T. Ohara, T. Wako, A. Kojima, T. Yoshida, D. Ishiuchi |
| Keywords: | laborsaving, lateral shoot, inheritance, environmental factor, Fusarium wilt resistance |
| Abstract:
Laborsaving techniques for pruning of lateral shoots are desirable in Japanese melon culture. A suppressed-branching line, ‘Melon Chukanbohon Nou 4’ (‘Melon parental line 4’) has been developed by backcrossing of a normal melon line ‘Erizabesu’ to a weed-type, less-branching melon line, ‘LB-1’ (Cucumis melo var. agrestis). In ‘Melon Chukanbohon Nou 4’ the upper part of the main stem, the 11th and upper nodes, have lateral shoots which rarely elongate longer than 20 cm. This line can be used for the breeding of melon cultivars which free farmers from the laborious task of vine-pruning. The suppressed-branching trait is controlled by a single recessive or incompletely dominant major gene, and the degree of dominance may be affected by the genetic background and environmental factors. Since the trait tended to be insufficiently expressed at higher temperatures and under higher light intensity conditions, it should be utilized for the breeding of cultivars for forcing culture, semi-forcing culture and late-seeding in late raising culture. In addition, ‘Melon Chukanbohon Nou 4’ is highly resistant to Fusarium wilt (Fusarium oxysporum f. sp. melonis) races 0, 1, 2, and 1,2y. | |
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