ARCHIVES
VOL. 6, ISSUE 4 (2021)
Phenotypic screening of rice genotypes for identifying resistance sources against rice tungro virus disease
Authors
Asma Jabeen, Krishnaveni Donempudi
Abstract
Host plant resistance has long been considered the most practical, environmentally sound, selective and effective means to combat a major destructive rice tungro virus disease. The disease is caused by the co-infection of a DNA virus (RTBV) & an RNA virus (RTSV) causing severe yield losses in rice crop. Therefore a large number of advanced breeding lines and germplasm which claimed to perform high level of resistance to tungro under the All India Coordinated Rice Pathology Program were collected from IIRR and rechecked for their consistency against rice tungro virus disease in the Plant Pathology glass house conditions (28 ± 20c, > 95% RH), Indian Institute of Rice Research. To facilitate selection, artificial inoculation techniques using vector aided transmission has been used in the greenhouse. Thus, the repeat evaluation tests revealed that among the 221 lines from National Screening Nurseries (2010-2015), 56 were resistant (scored 3) and 143 moderately resistant (scored 5) and 22 were susceptible (scored 7). Of the 86 lines, from Germplasm Screening Nurseries the current test exhibited 42 as resistant, 24 lines changed from resistant to moderate while 20 changed their reaction from resistant to susceptible by scoring 7 on the SES scale. The strategy of genetic evaluation programs through increased screening process aims to recombine different types and sources of resistance steadily through traditional breeding strategies.
Download
Pages:623-633
How to cite this article:
Asma Jabeen, Krishnaveni Donempudi "Phenotypic screening of rice genotypes for identifying resistance sources against rice tungro virus disease ". International Journal of Botany Studies, Vol 6, Issue 4, 2021, Pages 623-633
Download Author Certificate
Please enter the email address corresponding to this article submission to download your certificate.