Genetic analysis of nine yellow maize inbred lines for yield and resistance to northern leaf blight disease

Document Type : Original Article

Authors

1 cairo

2 Giza

3 giza

Abstract

Nine maize inbred lines were crossed at the Sakha Agricultural Research Station in a half daillel mating scheme in the season of 2021. The resulting 36 crosses were screened in two trials in the summer season of 2022. This information is required to obtain superior hybrids for grain production and resistance to northern leaf blight. Thirty six hybrids and two commercial hybrids were tested at the Agricultural Research Stations in Sakha, Sides and Mallawi, to check traits like days to 50% silk, plant and ear height, ears /plant, ear length, ear diameter, and grain yield .In the second experiment, 36 crosses were evaluated under three levels of nitrogen in a nursery under conditions of artificial infection with northern leaf blight at the Sakha Research Station to estimate the percentage of resistance to northern leaf blight. Highly significant differences were observed between the three sites in the first experiment for all traits evaluated and among the three nitrogen levels in the second experiment regarding the percentage of resistance to northern leaf blight. GCA and SCA variances were significant for all traits examined, except for mean squares resulting from SCA for ears/ plant and ear length in the first trial and northern leaf blight in the second trial. Meanwhile, desirable GCA effects for both grain yield and resistance to northern leaf blight were inbred lines Sk28/31 and Sd15. Three yellow crosses (Sk5010×Sd9), (Sk28/31×Sk5025) and (Sk5025×Sd15) recorded high values for both grain yield and resistance to northern leaf blight.

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Al-Azhar Journal of Agricultural Research
Volume 48, Issue 3 - Serial Number 3
Special Issue: Agriculture and Futuristic Challenges (Food Security: Challenges and Confrontation)
October 2023
Pages 121-131

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