Genetics of Yield, Yield Attributes, Tomato Leaf Curl Virus (TLCV) Resistance and Molecular Diversity in Lycopersicon Spp PDF Download
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Author: CHANDRASHEKAR A. C
Publisher:
ISBN:
Category :
Languages : en
Pages : 105
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Author: CHANDRASHEKAR A. C
Publisher:
ISBN:
Category :
Languages : en
Pages : 105
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Author: INDRAJYOTHI BHATTACHARJEE
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ISBN:
Category :
Languages : en
Pages : 87
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Author: R.P. Jaiprakashnarayan
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ISBN:
Category :
Languages : en
Pages : 179
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Author: G Umesha
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Category :
Languages : en
Pages : 147
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Author: NAGARAJ T. E
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Category :
Languages : en
Pages : 236
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ISBN: 9789463439398
Category :
Languages : en
Pages : 275
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Tomato yellow leaf curl disease (TYLCD) caused by Tomato yellow leaf curl virus (TYLCV) and a group of related species is a worldwide constraint of tomato (Solanum lycopersicum L.) production. Many countries have established quarantine measures to control this disease. Despite quarantine restrictions, TYLCD epidemic is still spreading due to the influence of climate change on insect vector population, rapid evolution of virus variants and global exchange of plant materials. Breeding for host plant resistance is considered as one of the most promising and sustainable methods in TYLCD control. Resistance to TYLCD was found in several wild relatives of tomato from which six TYLCV resistance genes (Ty-1 to Ty-6) have been identified. Breeding for TYLCV resistance has been focused on the introgression of the Ty-1 gene derived from S. chilense and the Ty-2 gene derived from S. habrochaites. Here it is shown that Ty-1 confers generic resistance against geminiviruses via enhancement of the transcriptional gene silencing (TGS) response. On the other hand, acquisition of beta-satellites by TYLCV can suppress the Ty-1-mediated TGS during co-infection. Ty-2 was not cloned yet at the start of this thesis research, thus we aimed to clone the Ty-2 gene. We fine-mapped Ty-2 to a small region of 32 kb using ‘intraspecific’ crosses between a Ty-2 introgression line and susceptible S. habrochaites accessions. In this region four genes were predicted, one of which was a full-length nucleotide binding leucine-rich repeat (NB-LRR) type gene. This gene proved to be the Ty-2 gene which confers species-specific resistance. A highly specific DNA marker tightly linked to the Ty-2 gene was developed permitting marker-assisted selection in tomato breeding.
Author: PRASANNA H. C
Publisher:
ISBN:
Category :
Languages : en
Pages : 112
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Author: JAGADEESH M
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Category :
Languages : en
Pages : 120
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Author: CHITTA RANJAN MOHANTY
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ISBN:
Category :
Languages : en
Pages : 126
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Author: K.S. Anil Kumar
Publisher:
ISBN:
Category :
Languages : en
Pages : 80
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