Development of bacterial wilt resistant F1 hybrids with long shelf life in tomato (Solanum Lycopersicum L.)
KrishiKosh
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Title |
Development of bacterial wilt resistant F1 hybrids with long shelf life in tomato (Solanum Lycopersicum L.)
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Creator |
K. M, Prasanna
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Contributor |
A. T, Sadashiva
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Subject |
fruits, diseases, planting, vegetables, hybrids, developmental stages, biological phenomena, heterosis, genotypes, mutants
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Description |
Bacterial wilt caused by Ralstonia solanacearum is a major constraint for tomato production in India. Tomato fruits are highly perishable and encounter more than 30 per cent wastage during transportation, storage and marketing. Present investigation was carried out at IIHR, Bangalore during 2000 to 2003, aiming at breeding tomatoes for resistance to bacterial wilt and long shelflife using ripening mutants (rin, nor and alc). Evaluation of lines during 2001 and 2002 showed 100 per cent survival in lines IIHR-15SB, BWR-1, BWR-1C, BWR-1F, BWR-5, BL985, TLBR2, TLBR4, TLBR6, IIHR-2199 and LE-415. Dominant single gene inheritance for BW resistance was noticed in IIHR-15SB, where as BL-985 and LE-415 exhibited complementary gene action. Evaluation of per se performance revealed IIHR-2199xIIHR-2174 as superior yielder, BWR-1FxIIHR-2052 as hybrid with longer shelf life and IIHR-2199xIIHR- 2174A and IIHR-2042xIIHR-2174 as crosses with promising field holding. Hybrids developed using nor and alc mutants exhibited improved on plant storability and shelf life of 22 to 24 days. Significant positive commercial heterosis for BW resistance was recorded in 22 crosses. The hybrids BWR-1FxIIHR-2174A and IIHR-2042xIIHR-2174 showed significant commercial heterosis for field holding where as, best shelf life was noticed in BWR-1FxIIHR-2052. The lines BWR-1F and IIHR-2050 exhibited positive significant gca effect for shelf life and on plant storage, IIHR-2199 and IIHR-2174 for yield. The cross BWR-1 x IIHR-2052 showed significant sca for on plant storage and BWR-1FxIIHR-2052 for shelf life. Crosses IIHR-2042xIIHR-2052 and BWR-1FxIIHR-2174 showed significantly superior sca effect for yield. Correlation studies indicated the possibility of selection for on plant storability through the study of shelf life and vice versa. Results confirmed the absence of any yield drag due to incorporation of long shelf life genes. Further improvement of tomato using best general combiners identified and multi-location testing of selected hybrids for further commercialization is emphasized. |
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Date |
2016-05-19T10:39:56Z
2016-05-19T10:39:56Z 2012-11-19 |
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Type |
Thesis
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Identifier |
Th-10423
http://krishikosh.egranth.ac.in/handle/1/66109 |
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Language |
en
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Format |
application/pdf
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Publisher |
University of Agricultural Sciences, Bengaluru
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