ARC Home I SJAR Home I About SJAR I Article Order Info. I Contribution to SJAR

Sudan Journal of Agricultural Research

Genetic variation and gene action on resistance to spotted stem borer, Chilo parlellus (Swinhoe) in three sorghum crosses


A. M. Nour, ¹ and A.E. Ali²


Abstract:

Inheritance pattern for resistance to the spotted stem borer Chilo partellus (Swinhoe) in grain sorghum was investigated in a generation mean analysis of three crosses involving three resistant and two susceptible sorghum genotypes in a field experiment during the long rainy season of 1990. Significant differences were found among the six generations (P₁, P₂, F₁, F₂, BC₁., and BC₂) for foliar damage, deadheart, percent stem tunnelling and number of exit/entry holes. Resistance to these charcters was mainly additive. Non-additive gene action has no effects on determining resistance to the stem borer. These results suggest the use of a breeding program whereby accumulation of desirable alleles at a number of loci is allowed.
 

Keywords:

Sudan Journal of Agricultural Research Vol. 1(1998) PP. 61-63