New Sources of Resistance to Multiple Pathotypes of Sclerospora graminicola in the Pearl Millet Mini Core Germplasm Collection

• DOI: 10.2135/cropsci2014.12.0822
• Publication Date: 2015-05-05T13:11:27Z
• Authors: Rajan Sharma; Hari D. Upadhyaya; Shivali Sharma; Vishal L. Gate; Chandramani Raj
• Keywords: Germ plasm; Pennisetum; Graminicola

ABSTRACT Downy mildew (DM), caused by Sclerospora graminicola (Sacc.) Schröt., is a highly destructive and widespread disease in most pearl millet [ Pennisetum glaucum (L.) R. Br.] growing areas of Asia Africa. Breeding for DM resistance continues to be an integral part genetic improvement at ICRISAT, Patancheru, India. For the identification new diverse sources resistance, mini core collection comprising 238 accessions was screened against eight pathotypes (Sg 384, Sg 409, 445, 457, 510, 519, 526, 542) S. collected from different geographical locations Significant differences reaction were observed among pathotypes, accessions, their interactions. Of 68 resistant (≤10% incidence) pathotype 510 followed 40 457. Resistance 542 15, 27, 29, 30, 34 respectively. two or more 62 accessions. Several these also exhibited desirable agronomic traits. The multiple‐pathotype‐resistant germplasm having characteristics agro‐ecologies would useful breeding programs develop hybrids difficult‐to‐manage highly‐virulent .