Screening of soybean germplasm for resistance to dampingoff caused by Pythium ultimum

Abstract

Hundred soybean germplasmlines were screened for resistance against Pythium ultimum Trow. Results showed that out of one hundred germplasm lines only eight entries viz., MAUS-102, JS-98-2, Kalitur, Himso-1587, MAUS-47, MAUS- 71, MAUS-158 and MAUS-162 have expressed resistance towards pre-emergence damping-off disease. Also, in postemergence mortality studies, the resistance were classified into 5 categories on the basis of seedling rot percentage i.e., resistant (8), moderately resistant (8),moderately susceptible (7), susceptible (16) and highly susceptible (61). This resistance grading can further be utilized to understand the resistance mechanism in soybean germplasm as well as in soybean breeding evaluation program.