PROMOTING ACCESS TO AFRICAN RESEARCH

African Journal of Biotechnology

Log in or Register to get access to full text downloads.

Remember me or Register



Isolation of NBS-LRR class resistant gene (I2 gene) from tomato cultivar Heamsona

Pritesh Parmar, RB Subramanian

Abstract


Three races of Fusarium oxysporum f. sp. lycopersici race 1, 2 and 3 are identified depending on the avirulence protein or effector protein secreted by fungal pathogen during the host colonization in tomato. These effector proteins are recognized by the host innate immune system based on R gene expressions that are I1, I2 and I3 in tomato for each races. Amongst the three, I2 protein has been cloned and characterized for the incompatibility against race 2 type of the pathogens. In India race 1 type of F. oxysporum f. sp. lycopersici observed commonly which require presence of I1 gene in tomato plant for the incompatibility reactions but in the present study, I2 gene was partially isolated from the tomato cultivar Heamsona and observed to be resistance against race 1 type of pathogen.

Keywords: Fusarium wilt, race, R-gene, resistance, tomato.

African Journal of Biotechnology Vol. 12(42), pp. 6076-6078



AJOL African Journals Online