Abstract：
:The emergence of new strains of Magnaporthe oryzae (M. oryzae) is associated with recurrent failure of resistance response mediated by single resistance (R) gene in rice. Therefore, stacking or combining of multiple R genes could improve the durability of resistance against multiple strains of M. oryzae. To achieve this, in the present study, intragenic stacking of rice blast resistance orthologue genes Pi54 and Pi54rh was performed through co-transformation approach. Both these genes were expressed under the control of independent promoters and blast susceptible indica rice line IET17021 was used for transformation. The highly virulent M. oryzae strain Mo-ei-ger1 that could knock down most of the major single blast R genes including Pi54 and exhibiting 89% virulence spectrum was used for phenotypic analysis. The stacked transgenic IET17021 lines (Pi54 + Pi54rh) have shown complete resistance to Mo-ei-ger1 strain in comparison to non-transgenic lines. These two R gene stacked indica transgenic lines could serves as a novel germplasm for rice blast resistance breeding programmes.
journal_name
3 Biotechjournal_title
3 Biotechauthors
Kumari M,Devanna BN,Singh PK,Rajashekara H,Sharma V,Sharma TRdoi
10.1007/s13205-017-1062-5subject
Has Abstractpub_date
2018-01-01 00:00:00pages
37issue
1eissn
2190-572Xissn
2190-5738pii
1062journal_volume
8pub_type
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