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Morphological Diversity and Resistance to Powdery Mildew in Melon (Cucumis melo L.) Accessions
High diversity of melon fruit. (A–B) Makuwa, (C–D) momordica, (E) inodorus, (F) chinensis, (G) cantalupensis, (H) reticulatus, and (I) wild melon.
High diversity of melon fruit. (A–B) Makuwa, (C–D) momordica, (E) inodorus, (F) chinensis, (G) cantalupensis, (H) reticulatus, and (I) wild melon.

Author:Ssu-Yu Lin, Jin-Hsing Huang, and Yu-Hwa Wang*

Abstract:

    As climate changes rapidly and the demands of diverse melon increase, melon market has urgent needs of commercial lines with stress-resistance, varied appearance and high-quality fruits. Because genetic diversity is the basis of melon breeding, comprehensive understanding of the melon germplasm and breeding line is essential. In this study, 102 melon accessions are collected and 32 horticultural traits are investigated in two seasons. According to the principle component analysis, two subspecies- Cucumis melo ssp. melo and ssp. agrestis, can be separated clearly, and major botanical groups can also be distinguished. Screening for resistance to powdery mildew pathogen (Podosphaera xanthii race 1) is also conducted in this study by leaf-disc inoculation. Results show that 30 accessions possess constant resistance and most of them belong to botanical group momordica, acidulus and reticulatus. With the horticultural traits and powdery mildew resistance of germplasm and breeding line, manpower and time required at initial stage of breeding can be significantly reduced.

Key words:Melon, Morphological diversity, Powdery mildew, Germplasm

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Journal of
Taiwan Agricultural Research
Vol. 73, No.2 (2024) ISSN: 2790-086X Vol. 73, No.2 (2024)
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