Maize hybrids response to high plant density in the Guinea savannah of Nigeria

Kamara, Alpha Y.; Menkir, Abebe; Abubakar, A. W.; Tofa, Abdullahi I.; Ademulegun, Temitope Damian; Omoigui, Lucky O.; Kamai, Nkeki

doi:10.1080/15427528.2020.1786761

Cited by 6 publications

(2 citation statements)

References 34 publications

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“…Therefore, selection of hybrids under various plant densities may be a promising strategy to improve the adaptation of maize hybrids to higher plant density. These results are consistent with the findings of other studies [ 12 , 13 , 36 , 38 ].…”

Section: Discussionsupporting

confidence: 94%

Genetic Diversity and Combining Ability of White Maize Inbred Lines under Different Plant Densities

Kamara

Rehan

Ibrahim

et al. 2020

Plants

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Knowledge of combining ability and genetic diversity are important prerequisites for the development of outstanding hybrids that are tolerant to high plant density. This work was carried out to assess general combining ability (GCA) and specific combining ability (SCA), identify promising hybrids, estimate genetic diversity among the inbred lines and correlate genetic distance to hybrid performance and SCA across different plant densities. A total of 28 F1 hybrids obtained by crossing eight adverse inbred lines (four local and four exotic) were evaluated under three plant densities 59,500 (D1), 71,400 (D2) and 83,300 (D3) plants ha−1 using spilt plot design with three replications at two locations during 2018 season. Increasing plant density from D1 to D3 significantly decreased leaf angle (LANG), chlorophyll content (CHLC), all ear characteristics and grain yield per plant (GYPP). Contrarily, days to silking (DTS), anthesis–silking interval (ASI), plant height (PLHT), ear height (EHT), and grain yield per hectare (GYPH) were significantly increased. Both additive and non-additive gene actions were involved in the inheritance of all the evaluated traits, but additive gene action was predominant for most traits. Inbred lines L1, L2, and L5 were the best general combiners for increasing grain yield and other desirable traits across research environments. Two hybrids L2 × L5 and L2 × L8 were found to be good specific combiners for ASI, LANG, GYPP and GYPH. Furthermore, these hybrids are ideal for further testing and promotion for commercialization under high plant density. Genetic distance (GD) among pairs of inbred lines ranged from 0.31 to 0.78, with an average of 0.61. Clustering based on molecular GD has effectively grouped the inbred lines according to their origin. No significant correlation was found between GD and both hybrid performance and SCA for grain yield and other traits and proved to be of no predictive value. Nevertheless, SCA could be used to predict the hybrid performance across all plant densities. Overall, this work presents useful information regarding the inheritance of maize grain yield and other important traits under high plant density.

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Section: Discussionsupporting

confidence: 94%

Genetic Diversity and Combining Ability of White Maize Inbred Lines under Different Plant Densities

Kamara

Rehan

Ibrahim

et al. 2020

Plants

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show abstract

“…Soil pH in water (H2O) was neutral at 7.21, while pH in KCl was moderately alkaline at 8.31. These pH values were within the required pH range for maize (5)(6)(7)(8), as earlier recommended [13]. The total nitrogen and electrical conductivity of the soil were low.…”

Section: The Soil's Physical and Chemical Characteristicssupporting

confidence: 83%

Maize growth and biomass yield as influenced by diazotroph and mycorrhizae inoculation

Odoh NC,

Yakubu C.,

Ncho CO

2023

World J. Adv. Res. Rev.

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The production of maize has significant nutrient needs, notably for nitrogen. Considering the negative impact of chemical fertilizer on the ecosystem, alternative supply of nutrients that is easily accessible and environmentally benign must be sourced. This study looked into the effects of inoculating mycorrhizae and diazotrophs on the growth and biomass output of maize. The treatments included three (3) levels of mycorrhiza (without mycorrhiza, with Glomus clarum, and with Glomus deserticola), as well as two (2) levels of diazotroph (with and without diazotroph). These treatment combinations were applied to thirty (30) pots, each containing 3 kg of soil. The experiment was laid out in a randomized complete block design (RCBD). Data were collected on growth parameters such as leaf area, number of leaves, stem girth, and plant height at 2-week interval. The trial was terminated at 8 weeks after sowing (WAS), and yield parameters measured included root length, fresh and dry shoot weight, and fresh and dry root weight. The data were subjected to analysis of variance (ANOVA) using the General Linear Model procedure with Minitab statistical software. A significant interactive effect of diazotrophs and mycorrhiza was observed in stem girth at 4 WAS. The highest stem girth (4.02 cm) was obtained under combined application of diazotroph and G. clarum while the least stem girth (3.38 cm) was obtained under control (no-diazotroph and no-mycorrhiza treatment). Mycorrhiza application positively influenced root length, fresh root weight, fresh shoot weight, dry root weight and dry shoot weight

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Modeling the potential impact of climate change on maize-maize cropping system in semi-arid environment and designing of adaptation options

Abbas,

Ahmed,

Fatima

et al. 2023

Agricultural and Forest Meteorology

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Maize hybrids response to high plant density in the Guinea savannah of Nigeria

Cited by 6 publications

References 34 publications

Genetic Diversity and Combining Ability of White Maize Inbred Lines under Different Plant Densities

Genetic Diversity and Combining Ability of White Maize Inbred Lines under Different Plant Densities

Maize growth and biomass yield as influenced by diazotroph and mycorrhizae inoculation

Modeling the potential impact of climate change on maize-maize cropping system in semi-arid environment and designing of adaptation options

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