Abstract Low soil nitrogen limits maize ( Zea mays L.) production in the West and Central African subregion. Levels of residual genetic variability were determined two low‐ N populations using selfed progeny evaluations, results obtained indicate large genotypic phenotypic variances for grain yield under both high‐ environments effective selection, while heritability estimates generally low. Ear aspect stay green most important traits contributing to populations. Selection reduced days...

Low soil nitrogen (low-N) level is responsible for yield reduction in maize (Zea mays L.) fields sub-Saharan Africa. A clear understanding of the genetic diversity among early generation inbred lines selected from various elite low-N- tolerant populations offers an opportunity to obtain that could be used parental combinations develop high-yielding low-N-tolerant hybrids. total 115 S3 derived four were assessed using 15 670 single nucleotide polymorphism (SNP) markers. The SNP markers highly...

Low soil nitrogen (N) This study was part of the major author's PhD thesis, funded by NSF grant from University Illinois at Urbana Champaign and International Institute Tropical Agriculture (IITA), Ibadan, Nigeria. We express our gratitude to Julian Seebauer Fred Below's Crop Physiology Laboratory, Department Sciences, for N analyses staff IITA Ibadan Maize Improvement Program field assistance. sub-optimal fertilizer applications result in poor grain yield (GY) maize. Genotypes with improved...

Maximizing seed longevity is important for genebanks to efficiently manage their accessions, reducing the frequency of costly regeneration cycles and loss genetic integrity. Research on rice seeds has shown that subsequent in air-dry storage can be improved by drying seeds, which are metabolically active at harvest (moisture contents above a critical value close 16.5%), an initial period higher temperature (40°C–60°C) than currently recommended current genebank standards (5°C–20°C). The aim...

Abstract Breeding efforts in West and Central Africa (WCA) have focused on the development of Low‐N‐tolerant (LNT) maize inbreds their classification into heterotic groups. This study was conducted to classify LNT lines groups using testcross performance, morphological SNP markers compare consistency groupings by three methods. Thirty‐six were crossed two contrasting inbred testers generate 72 testcrosses that evaluated under low‐N conditions Nigeria 2014. Also, 36 for per se performance...

Low yields of soybean in Nigeria are attributed to many factors such as decliningsoil fertility and use low yielding varieties. Phosphorus is a soybeanplant growth-limiting nutrient.Therefore, application phosphorus fertilizer atoptimum level essential. Two experiments were carried out at Ibadan, toestimate the optimum P-fertilizer rate for investigate responseof different sources P applied rate. Thetreatments first experiment two varieties (TGX1987-10F andTGX1987-62F) single superphosphate...

ABSTRACT The use of mulches in vegetable production is undergoing a radical change away from high input, nonrenewable resources, such as plastic, to the high-residue organic cover crops. purpose this study was compare yield three tomato varieties when grown under different live mulches. In 2001 and 2002, (CLN14665, Roma T337) were evaluated for at Research Farm National Horticultural Institute (NIHORT), Ibadan, Nigeria, split-plot experiment laid out randomized complete block design....

Purpose : Suboptimal plant population has been identified as one of the causes low yield maize in Nigeria, hence need for increased per hectare. Maize varieties respond differently to density. There is identify that well density towards developing tolerance stress.Research Method Four new were tested under 53,333 (ND) and 106,666 plants/ha (DD). The trials conducted at two locations seasons. experimental design was split plot three replications. DD plots received additional 50% fertilizer....

Limitations against propagation of Cola nitida include pronounced dormancy between 1 and 8 months after sowing (MAS) leading to uneven germination seedling growth. This experiment was conducted in a screenhouse, Federal University Agriculture Abeokuta, Nigeria, evaluate the effects mini-nut nut-color on growth C. nuts. The completely randomized design replicated 3 times. Treatments comprised two factors: nut/seed-colored biotype (white, pink, red) (embryonic portion cotyledon) [excised...

Kolanut has diverse pharmacological properties and is prominent in regional trade West Africa. Kolanuts (Cola nitida) exhibit long dormancy uneven germination. A greenhouse study was conducted to determine if curing would break the support even germination of kolanuts. Forty ripe uncured kolanuts (≥15 g) were randomly selected from a lot. The remaining wrapped with fresh banana leaves stored woven basket lined leaves. At intervals 2 weeks, for 12 replaced ones. each replacement, sample 40...

Drought, a major abiotic constraint in upland rice field, increases production losses and sometimes causes complete crop failure. Information on response of New Rice for Africa (NERICA) cultivar to silicon compost is scanty. An experiment conducted under greenhouse condition investigated the effects augmentation performance water-stressed at different growth stages. The study was 3 x 4 factorial fitted into CRD with four replicates. Growth yield parameters NERICA vegetative stage were...