Screening cultivated and wild genotypes of water melon Citrullus lanatus (Thumb) to identify resistance against Fusarium oxysporum f.sp. niveum race 2

Saheb Pal; Sreenivasarao Eguru; R N Thontadarya; Sriram Subbaraman

doi:10.24154/jhs.v20i1.2630

Authors

Saheb Pal ICAR-Indian Agricultural Research Institute, Jharkhand Author
Sreenivasarao Eguru ICAR-Indian Institute of Horticultural Research, Hesaraghatta Lake PO, Bengaluru-560089, Karnataka , Indian Institute of Horticultural Research Author
R N Thontadarya ICAR-Indian Institute of Horticultural Research, Hesaraghatta Lake Post, Bengaluru-560089, Karnataka , Indian Institute of Horticultural Research Author
Sriram Subbaraman ICAR-Indian Institute of Horticultural Research, Bengaluru-560089, Karnataka, India , Indian Institute of Horticultural Research Author

DOI:

https://doi.org/10.24154/jhs.v20i1.2630

Abstract

The present experiment was carried out to screen 341 Citrullus sp. accessions for identification of resistant genotypes against Fon race 2. The accessions were screened across two consecutive experiments conducted during the late-rainy season of 2017. Spore suspension of Fon race 2 was inoculated following the standard pipette method at 14-day seedling stage. An accession showing a mean survival of > 67% at 28 days post-inoculation (DPI) was categorized as resistant and the remaining accessions were categorized as susceptible. A total of 30 accessions were found resistant. Of them, eight accessions possessed a mean survival of > 90% at 28 DPI and were categorized as highly resistant. All these highly resistant accessions belong to C. lanatus with moderate fruit quality traits. Therefore, these genotypes could be used for watermelon improvement programs in the future that aim to incorporate resistance to Fon race 2 into the crop’s elite and commercial market segments without incurring linkage drag.

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Author Biographies

Saheb Pal, ICAR-Indian Agricultural Research Institute, Jharkhand

Scientist (Vegetable Science), ICAR-Indian Agricultural Research Institute, Jharkhand, Gauria Karma, Barhi, Hazaribagh, Jharkhand-825405
Sreenivasarao Eguru, ICAR-Indian Institute of Horticultural Research, Hesaraghatta Lake PO, Bengaluru-560089, Karnataka, Indian Institute of Horticultural Research

Principal Scientist, Division of Vegetable Crops, ICAR-Indian Institute of Horticultural Research, Bengaluru 560089, India
R N Thontadarya, ICAR-Indian Institute of Horticultural Research, Hesaraghatta Lake Post, Bengaluru-560089, Karnataka, Indian Institute of Horticultural Research

Division of Vegetable Crops, ICAR-Indian Institute of Horticultural Research, Hesaraghatta Lake Post, Bengaluru-560089, Karnataka
Sriram Subbaraman, ICAR-Indian Institute of Horticultural Research, Bengaluru-560089, Karnataka, India, Indian Institute of Horticultural Research

Head, 3Division of Crop Protection, ICAR-Indian Institute of Horticultural Research, Bengaluru 560089, India

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