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Development of tomato hybrids resistant to tomato leaf curl virus disease in South India.

Development of tomato hybrids resistant to tomato leaf curl virus disease in South India.

Shankarappa, K.S., Sriharsha, K.T., Aswathanarayana, D.S., Prameela, H.A., Kulkarni, R.S., Muniyappa, V., Rao, A.M. and Maruthi, M.N. (2008) Development of tomato hybrids resistant to tomato leaf curl virus disease in South India. Euphytica, 164 (2). pp. 531-539. ISSN 0014-2336 (Print), 1573-5060 (Online) (doi:10.1007/s10681-008-9750-1)

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Abstract

Resistance to tomato leaf curl virus disease (ToLCVD) in tomato (Solanum lycopersicum) is scarce but was developed recently in three open pollinated (OP) varieties (Sankranthi, Nandi and Vybhav), which are now available for cultivation in South India. Hybrids with superior yield capabilities, however, are a preferred choice of cultivation
by farmers but hybrids are highly susceptible to ToLCVD. In order to develop virus resistant tomato hybrids, the three OPs were crossed with 12 tomato genotypes with superior agronomic characteristics.
From the crosses, 20 hybrids were selected (named BLRH-1 to BLRH-20, Bangalore leaf curl virus-resistant hybrid) and evaluated for their resistance to ToLCVD at the University of Agricultural Sciences, Bengaluru, South India, both through whiteXy-mediated inoculations in the glasshouse and
natural infection in the Weld during summer 2005.
Their growth and fruit yield parameters were compared against the popularly grown hybrids and OPs. Differences occurred between hybrids in disease incidence, spread, symptom severity and fruit yield. Of the 20 hybrids evaluated, 11 were found resistant to ToLCVD in the field, but only three (BLRH-3, BLRH-9 and BLRH-16) remained resistant when challenged with high virus inoculum pressure
in the glasshouse through whiteXy-mediated inoculations. None of the six commercially available hybrids tested was found resistant to ToLCVD. An examination of the extent of heterosis in resistant hybrids for both quantitative and qualitative characters over the popularly grown hybrid, US-618, indicated a major improvement in virus resistance, yield and fruit quality. All the twenty hybrids yielded significantly more than US-618, and of these, BLRH-3 and BLRH-16 were considered the best with yields over ca. 60 t/ha and resistant to virus both in the glasshouse and field.

Item Type: Article
Uncontrolled Keywords: bemisia tabaci, heterosis, hybrids, virus resistance, Screening, whitefly
Subjects: S Agriculture > S Agriculture (General)
S Agriculture > SB Plant culture
Faculty / Department / Research Group: Faculty of Engineering & Science > Natural Resources Institute
Faculty of Engineering & Science > Natural Resources Institute > Agriculture, Health & Environment Department
Faculty of Engineering & Science
Related URLs:
Last Modified: 11 Aug 2015 16:39
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
URI: http://gala.gre.ac.uk/id/eprint/2156

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