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Article

Evaluation of Loofah Lines for Resistance to Tomato Leaf Curl New Delhi Virus and Downy Mildew, as well as Key Horticultural Traits

1
World Vegetable Center, East and Southeast Asia, Kasetsart University, Kamphaeng Saen, Nakhon Pathom 73140, Thailand
2
Vegetable Division, Horticultural Research Center, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur 1701, Bangladesh
3
U.S. Department of Agriculture, Agricultural Research Service, Plant Genetic Resources Conservation Unit, 1109 Experiment St., Griffin, GA 30223, USA
*
Author to whom correspondence should be addressed.
Agriculture 2020, 10(7), 298; https://doi.org/10.3390/agriculture10070298
Received: 19 May 2020 / Revised: 9 July 2020 / Accepted: 13 July 2020 / Published: 15 July 2020
(This article belongs to the Special Issue Conservation and Characterization of Vegetable Crop Biodiversity)
Two loofah (Luffa) species, the ridge gourd (Luffa acutangula (L.) Roxb.) and the sponge gourd (L. cylindrica (L.) M. Roem.; syn. L. aegyptiaca), are cultivated widely in Asia by smallholder famers. Both species have significant economic and nutritional importance. However, Tomato leaf curl New Delhi virus (ToLCNDV) and downy mildew (DM) caused by Pseudoperonospora cubensis are important biotic constraints to loofah production throughout Asia. Loofah landrace-derived breeding lines, developed at the World Vegetable Center (WorldVeg), were evaluated at the WorldVeg East and Southeast Asia Research and Training Station, Kasetsart University, Kamphaeng Saen, Thailand—where natural epidemics of ToLCNDV and DM regularly occur. The lines were also evaluated for other commercially important horticultural traits such as days to 50% staminate and pistillate flowering, fruit color, fruit bitterness, and market segment classification. Thirteen and 59 lines of ridge gourd and sponge gourd, respectively, were determined to be resistant to both ToLCNDV and DM. These lines covered all market segments of loofah and exhibited variability for all of the evaluated horticultural traits. The results of these evaluations and their implications on loofah breeding are discussed. View Full-Text
Keywords: Luffa acutangula; Luffa cylindrica; Tomato leaf curl New Delhi virus; downy mildew; resistance; fruit traits; evaluation; germplasm Luffa acutangula; Luffa cylindrica; Tomato leaf curl New Delhi virus; downy mildew; resistance; fruit traits; evaluation; germplasm
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MDPI and ACS Style

Dhillon, N.P.S.; Masud, M.A.T.; Pruangwitayakun, S.; Natheung, M.; Lertlam, S.; Jarret, R.L. Evaluation of Loofah Lines for Resistance to Tomato Leaf Curl New Delhi Virus and Downy Mildew, as well as Key Horticultural Traits. Agriculture 2020, 10, 298. https://doi.org/10.3390/agriculture10070298

AMA Style

Dhillon NPS, Masud MAT, Pruangwitayakun S, Natheung M, Lertlam S, Jarret RL. Evaluation of Loofah Lines for Resistance to Tomato Leaf Curl New Delhi Virus and Downy Mildew, as well as Key Horticultural Traits. Agriculture. 2020; 10(7):298. https://doi.org/10.3390/agriculture10070298

Chicago/Turabian Style

Dhillon, Narinder P.S.; Masud, Mohammed A.T.; Pruangwitayakun, Somchit; Natheung, Monpapa; Lertlam, Suyuporn; Jarret, Robert L. 2020. "Evaluation of Loofah Lines for Resistance to Tomato Leaf Curl New Delhi Virus and Downy Mildew, as well as Key Horticultural Traits" Agriculture 10, no. 7: 298. https://doi.org/10.3390/agriculture10070298

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