genetics of resistance to leaf blight (helminthosporium turcicum) disease in maize
Abstract: The aim of the present investigation was to study the nature of inheritance of maize resistance to turcicum leaf blight (TLB) disease caused by Helminthosporium turcicum which becomes a serious problem to maize plantings in Egypt, especially at North and West Delta in the late planting. Complete diallel crosses (including reciprocals) were done among eight inbred lines of maize that differ in their resistance to the TLB disease. Parents, F1’s and reciprocals were evaluated under artificially infection conditions at two locations (Sakha and Nubaria). Results indicated similar behaviour of genotypes for percentage of diseased plants at both locations. Both general (GCA) and specific (SCA) combining ability mean squares were highly significant for percentage of diseased plants with TLB. Though both additive and dominance variances were important in controlling resistance to TLB disease in maize, additive played greater role than dominance variance in the inheritance of resistance. Narrow-sense heritability for maize resistance to TLB was high and reached 83.0 and 81.5 % at Sakha and Nubaria, respectively. Analysis of data indicated that resistance to TLB disease in maize may be oligogenic in nature and is mainly controlled by one gene (one gene group) in addition to indications of some quantitative effects.
Publication year 2002
Pages 175-190
Availability location معهد بحوث المحاصيل الحقلية- 9 ش الجامعة – الجيزة
Availability number
Organization Name
serial title المجلة المصرية لتربية النبات
Author(s) from ARC
External authors (outside ARC)
    احمد مدحت محمد النجار 1. قسم المحاصيل، كلية الزراعة-جامعة القاهرة
    ، محمد رضا على شبانه 1. قسم المحاصيل، كلية الزراعة-جامعة القاهرة
Agris Categories Agriculture - General aspects
AGROVOC
TERMS		 Maize. Setosphaeria turcica.
Publication Type Journal
↑