%0 Journal Article
%@ 1021-9730
%A Ntare, B R
%A Waliyar, F
%D 1999
%F icrisat:3033
%I African Crop Science Society
%J African Crop Science Journal
%K Arachis Hypogaea, Cercosporidium, disease resistance,Breeding
%N 2
%P 109-115
%T Genotype and environmental effects on resistance to late leafspot in groundnut
%U http://oar.icrisat.org/3033/
%V 7
%X In 1995 and 1996, 15 advanced breeding lines of groundnuts along with a local check were evaluated in a replicated trial for yield and reaction to late leafspot (Cercosporidium personatum [Mycosphaerella berkeleyi]) at Gaya in Niger and Bagauda in Nigeria. Variation among locations within years was significant for pod yield and late leafspot as well as among genotypes. The genotype×year interaction variance for late leafspot was one-fifth the magnitude of the genetic variance while genotype×location variance was larger that the genetic variance. The genotype×year×location variance was two-thirds the magnitude of the genetic variance. Broad-sense heritability was low for pod yield (46%), high for seed weight (84%) and shelling percentage (86%) and intermediate for late leafspot (53%). The results indicated the need to test breeding lines for resistance to late leafspot in more years and locations. High yielding late leafspot resistant lines were found