Progress From Selection of Some Maize Cultivars’ Response to Drought in the Derived Savanna of Nigeria

Abstract

Field experiments were conducted to investigate the variations in sixteen maize genotypes in relation to drought tolerance. The experimental set up was subjected to drought stress after five weeks of planting for three weeks before data on morphological and yield characters of maize genotypes were obtained for three cropping years. Plant height and grain yield of Bodija yellow maize were the highest overall. There was a significant difference among genotypes for drought stress resistance and Bodija yellow maize showed the most tolerance, while TZBR Comp 1 -C1 S2 510 genotype was the least. First principal component axis (Prin 1) had the highest contribution to the variation of the morphological, yield and drought tolerance traits. Prin 1 was highly related to the morphological and yield characters more than to the drought resistance. Plant height was negatively and strongly correlated (p<0.01) with stem height, number of leaves, stem girth, leaf length, leaf width and week after planting, but negatively correlated with the drought resistance. Therefore, Bodija yellow maize should be considered as parent material in breeding for the development of drought tolerant traits in maize.

Genetic relationships among okra (Abelmoschus esculentus (L.) Moench) cultivars in Nigeria

“…Appropriately, this result depicted that expected progress from the selection of the cultivars is between 16.1 % (days to anthesis) and 51.8 % (capsule yield). This substantiates with the findings of Olawuyi et al (2015) and Hazem et al (2013).…”

Genetic Variability on Tolerance of Maize (<i>Zea mays</i> L.) Genotypes Induced with Sodium Azide Mutagen

“…This is an indication of genetic variability which exists among characters as previously reported by Olawuyi et al (2015), and Olawuyi et al (2016) and Agbolade et al (2016). This character could be further considered in mutation breeding.…”

“…Genetic variation is fundamental to successful breeding programs in vegetatively and sexually propagated plants (Olawuyi et al, 2015;Agbolade et al, 2016). This variation which occurs naturally or artificially induced by physical, biological or chemical mutagens has attracted the interest of plant breeders for many decades.…”

Assessment of Inbred Lines of Maize for Water Stress Tolerance in Field Conditions

“…Significant variation in plant height may be due to the stress treatment encountered by plants before the occurrence of rainfall. Olawuyi et al, (2015) has reported the positive correlation between plant height and drought stress supporting our observations. The rainfall which occurred during the reproductive stage may have caused the plants to adapt to drought stress and resulted in recovery of yield and other yield parameters (Chen et al, 2016).…”