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Yield improvement in maize for tolerance to low soil nitrogen
Author(s) -
Ajala Sam Oyewole,
Olaniyan Amudalat Bolanle,
Olayiwola Muyideen Oluseyi,
Job Anthony Oluwatoyosi
Publication year - 2018
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/pbr.12568
Subject(s) - heritability , biology , agronomy , yield (engineering) , grain yield , zea mays , nitrogen , population , poaceae , selection (genetic algorithm) , genetic variability , gene–environment interaction , genotype , genetics , materials science , physics , demography , quantum mechanics , artificial intelligence , sociology , computer science , gene , metallurgy
Low soil nitrogen limits maize ( Zea mays L.) production in the West and Central African subregion. Levels of residual genetic variability were determined in two low‐ N populations using selfed progeny evaluations, and results obtained indicate large genotypic and phenotypic variances for grain yield under both low‐ and high‐ N environments for effective selection, while heritability estimates were generally low. Ear aspect and stay green were the most important traits contributing to grain yield for both populations. Selection reduced days to flowering, ASI and ear aspect, but increased plant height and yield. Yield gains of more than 25% occurred for the two populations under both low and high N with the most significant change of 42% occurring in one population under high N .