International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2017, Volume : 5, Issue : 4
First page : (689) Last page : (697)
Article doi: http://dx.doi.org/10.18782/2320-7051.5467
Genetic Variability for Downy Mildew Disease Incidence in Mapping Population Parents of Pearl Millet
Anishetti Saritha1, Chelpuri Durgaraju1, Rakesh K. Srivastava2, Kilaru Kanakadurga3, Narayan Reddy4, Rajan Sharma2, Pooja Katiyar2 and Kuldeep Singh Dangi1*
1Department of Genetics and Plant Breeding, College of Agriculture, Rajendranagar, 500 030
2International Crops Research Institute for the Semi-Arid Tropics, Patancheru, 502324.
3Seed Research and Technology Centre, Rajendranagar, 500 030
4Department of Plant Pathology, College of Agriculture, Rajendranagar, 500 030
*Corresponding Author E-mail: dangiks24@gmail.com
Received: 15.07.2017 | Revised: 24.07.2017 | Accepted: 26.07.2017
ABSTRACT
Downy mildew caused by Sclerospora graminicola (Sacc.) Shroet. is a major biotic constraint to pearl millet production in the semi-arid tropics. The pathogen is heterothallic and frequent recombination leads to evolution of new virulent populations. Identification of resistance to new virulent isolates is a prerequisite for resistance breeding. In the present investigation, forty parents along with five control entries were screened against three Indian populations of Sclerospora graminicola under greenhouse conditions. Among the parental lines under study, ICMP 85410-P7, LGD-1-B-10, Tift 23DB-P1-P5, H77/833-2-P5, H77/833-2, Tift 238D1, ICMB 89111-P6, 81B-P13, ICMB 01222-P1, ICMB 95333-P1, ICMB 95333-P5 and IPC 804-P4 were found to be highly susceptible (>80 % DMI) in screening against three Indigenous pathogen isolates from Gujarat (Sg445), Haryana (Sg519) and Rajasthan (Sg526), while 863B-P2, AIMP 92901-S1-183-2-2-B-P08 and AIMP 92901-S1-15-1-2-B-P03 were resistant (<10% DMI) to test isolates. Some parents exhibited different levels of DM incidence to pathogen - isolates.
Key words: Inoculation; Isolates; Pathogenicity; Screening; Resistance;
Full Text : PDF; Journal doi : http://dx.doi.org/10.18782
Cite this article: Saritha, A., Durgaraju, C., Srivastava, R.K., Kanakadurga, K., Reddy, N., Sharma, R., Katiyar, P. and Dangi, K.S., Genetic Variability for Downy Mildew Disease Incidence in Mapping Population Parents of Pearl Millet, Int. J. Pure App. Biosci.5(4): 689-697 (2017). doi: http://dx.doi.org/10.18782/2320-7051.5467
