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Contamination of maize grain with mycotoxins including aflatoxin and fumonisin poses a threat to human health and livestock. The objectives of this study were to determine the current status of incidence of ear rot causing fungi, which are associated with mycotoxin contamination, in southern African maize hybrids, and to check whether or not mycotoxin resistance genes can be stacked in a single product...
Genetic control of the leaf chlorophyll concentration (LCC) in tropical maize (Zea mays L.) genotypes has not been established, especially at different reproduction growth stages under low and high nitrogen (N). A generation mean analysis study was conducted to identify the genetic effects that govern the LCC from mid-silking to physiological maturity under high (120 kg N ha−1) and low (60 kg N ha...
Fusarium wilt is the main pigeonpea production constraint in Malawi. The purpose of the study was to understand the nature and mechanism of inheritance of F. wilt resistance, yield and secondary traits in pigeonpea. 48 crosses were generated in a 12 lines × 4 testers mating scheme. Some F1 plants were selfed for segregation analysis for inheritance pattern of resistance, while others were evaluated...
Grain yield is more likely to be compromised by poor seed germination and vigour in low phytic acid (LPA) and quality protein maize (QPM) than normal maize (Nm), especially when grown under stressful tropical environmental conditions. The objectives of this study were to determine the effect of stress conditions on seed germination and vigour traits (percentage germination, seedling dry weight, average...
The level of phytic acid is difficult to assess in a maize breeding programme, therefore a co-dominant single nucleotide polymorphism (SNP) marker was used to detect the single recessive low phytic acid (lpa1-1) gene in a BC2F1 population developed from a locally adapted tropical normal inbred line (P 16) and CM 32 (lpa1-1 donor). High-resolution melt analysis of the lpa1-1 SNP marker was able to...
The generation of banana triploids from tetraploid–diploid crosses requires knowledge on the influence of the parents on black Sigatoka resistance and agronomic traits to the triploid progenies. The objective of this investigation was to determine the influence of tetraploid and diploid parents on black Sigatoka resistance and agronomic traits in the triploid progenies generated from tetraploid–diploid...
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