Genetic analysis of partial resistance to vine decline in watermelon [Citrullus lanatus (Thunb.) Matsum&Nakai]

Vine decline or sudden wilt caused by a complex of pathogens with unknown etiology is emerging as most destructive disease of watermelon in the southern part of India. In this direction ICAR-IIHR, has identified a prebred line derived from Citrullus amarus viz., BIL-53 to be field tolerant to this d...

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Bibliographic Details
Published in:Indian phytopathology 2020-06, Vol.73 (2), p.361-365
Main Authors: Maragal, Siddharood, Arpitha, K., Revadi, Muttanna, Mahapatra, Sourav, Avinash, K. N., Sandeepkumar, G. M., Rao, Eguru Sreenivasa
Format: Article
Language:English
Subjects:
Biomedical and Life Sciences
Life Sciences
Plant Pathology
Short Communication
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Summary:Vine decline or sudden wilt caused by a complex of pathogens with unknown etiology is emerging as most destructive disease of watermelon in the southern part of India. In this direction ICAR-IIHR, has identified a prebred line derived from Citrullus amarus viz., BIL-53 to be field tolerant to this disease. This study was planned to understand the genetics of vine decline resistance in this accession. The BIL-53 used as resistant parent was crossed with icebox accession, IIHR‐140–152, a susceptible genotype to develop F 1 , F 2 , BC1 and BC2 generations and observe the segregation for disease reaction. The results in F 2 and backcross progenies suggested that resistance is governed by a single recessive gene. BIL-53 is also known to possess resistance to WBNV and hence, this line can be used in resistance breeding programs to develop combined resistance to vine decline and watermelon bud necrosis orthotospovirus employing back cross breeding. Further, this line can be tested as a rootstock in overcoming vine decline as an immediate measure.
ISSN:0367-973X
2248-9800
DOI:10.1007/s42360-020-00197-z