TY  - JOUR
AV  - restricted
A1  - Mathur, K
A1  - Thakur, R P
A1  - Rao, V P
TI  - Characterization of Colletotrichum graminicola populations from a sorghum hybrid CSH 9 for morphological and pathogenic variability
UR  - http://oar.icrisat.org/4933/
JF  - Indian Phytopathology
SN  - 0367-973X
PB  - Indian Phytopathological Society
N2  - During a field survey in the 1994 rainy season a popular commercial sorghum hybrid CSH 9 was found showing anthracnose (Colletotrichum graminicola) symptoms in several farmers' fields in Maharashtra state of India. About 100 single-lesion isolates obtained from representative leaf samples from four fields of CSH 9 and one field of a local sorghum cultivar (LSC) were characterized and compared for morphological and pathogenic variability. The representative single-lesion isolates and their derivatives varied significantly for morphological traits - colony color, growth pattern, spore size and sporulation rate on oatmeal agar medium. These isolates also exhibited significant variation for latent period, virulence, aggressiveness, and virulence index on a set of sorghum differential lines in a greenhouse test. The isolate from the LSC, although differed morphologically from those of CSH 9, did infect CSH 9 and its parental lines, indicating a virulence shift in the C. graminicola population from the local sorghum to hybrid CSH 9.
KW  - Sorghum anthracnose
KW  -  pathogenic variability
KW  -  virulence index
Y1  - 2001///
SP  - 299
ID  - icrisat4933
EP  - 303
VL  - 54
IS  - 3
ER  -