Mineral Composition of the Grains of Tropical Maize Varieties as Affected by Pre-Anthesis Drought and Rate of Nitrogen Fertilization

Crop Science ◽  
2005 ◽  
Vol 45 (2) ◽  
pp. 516-523 ◽  
Author(s):  
B. Feil ◽  
S. B. Moser ◽  
S. Jampatong ◽  
P. Stamp
Keyword(s):  
Mineral Composition ◽  
Nitrogen Fertilization ◽  
Tropical Maize ◽  
Maize Varieties

scholarly journals Investigating the Type of Gene Action Conditioning Tolerance to Aluminum (Al) Toxicity in Tropical Maize

2019 ◽  
pp. 1-8
Author(s):  
Victoria Ndeke ◽  
Langa Tembo
Keyword(s):  
Root Length ◽  
Aluminum Toxicity ◽  
Gene Action ◽  
Abiotic Factors ◽  
Al Toxicity ◽  
High Yield ◽  
Small Scale ◽  
Tropical Maize ◽  
Maize Varieties ◽  
Small Scale Farmers

Maize is a third important cereal crop in the world after wheat and rice. In Zambia, it is an important staple crop. Its production is however hampered by both biotic and abiotic factors. Among the abiotic factors, Aluminum (Al) toxicity causes high yield losses and is directly linked to acidic soils. Application of lime can ameliorate this problem, but it is expensive for small scale farmers. Developing maize varieties that are tolerant to Al toxicity is cheaper and feasible for small scale farmers. The purpose of this research was to investigate the type of gene action conditioning tolerance to aluminum toxicity in tropical maize.  Eleven inbred lines were mated in an 8 male (4 moderately tolerant and 4 susceptible) x 3 female (resistant) North Carolina Design II. Results revealed that general combining ability (GCA) effects due to both males and females were highly significant (P≤ 0.001) for root biomass. The shoot length GCA effects due to both male and female respectively were significant (P≤ 0.01). Similarly, the GCA effects due to females and males for root length were significant, P≤ 0.01 and P≤ 0.05 respectively. The genotype CML 511 had the most desirable significant GCA effect value (1.40) for root length among the male lines while CML 538 had the most desirable significant GCA effect value (0.92) among the female lines. The baker’s ratio for root length was found to be 0.49 implying that both additive and non-additive gene action were important in conditioning aluminum toxicity tolerance in tropical maize.

scholarly journals Mineral composition of oat grains in response to nitrogen fertilization and growth regulator

2020 ◽  
Vol 15 (2) ◽  
pp. 1-7
Author(s):  
J.H.B. Bazzo ◽  
T.M. Souza ◽  
A.C.F. Campana ◽  
K.M.A. Arruda ◽  
C.R. Riede ◽  
...  
Keyword(s):  
Mineral Composition ◽  
Growth Regulator ◽  
Nitrogen Fertilization

scholarly journals The Impact of Nitrogen Fertilization and the Use of Biostimulants on the Yield of Two Maize Varieties (Zea mays L.) Cultivated for Grain

Agronomy ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1408
Author(s):  
Krzysztof Kapela ◽  
Anna Sikorska ◽  
Marek Niewęgłowski ◽  
Ewa Krasnodębska ◽  
Krystyna Zarzecka ◽  
...  
Keyword(s):  
Nitrogen Fertilization ◽  
Control Object ◽  
Maize Yield ◽  
Family Farm ◽  
Maize Varieties ◽  
Maize Grain ◽  
Set Up ◽  
Hybrid Cultivar ◽  
The Impact

The field experiment was carried out in 2015–2017 on a family farm in Toczyski Czortki, in the Mazovia voivodeship in Poland. The experiment was set up in a split–split–plot system in three replications. The area of one plot was 30 m−2. The studied factors were: I—two maize varieties: PR38N86 (medium late hybrid cultivar 280 FAO), P8400 (medium early hybrid cultivar 240 FAO); II—four doses of nitrogen fertilization: 1. control object—without the use of nitrogen (0 kg N·ha−1), 2. nitrogen dose—80 kg N·ha−1 (applied once before sowing), 3. nitrogen dose—120 kg N·ha−1 (applied once before sowing), 4. nitrogen dose—160 kg N·ha−1 (applied once before sowing); III—four types of biostimulants used: 1. control object—without using a biostimulant, 2. Asahi®SL biostimulant: I term—four-leaf phase (BBCH 14) at a dose of 0.60 dm3∙ha−1, II term—eight-leaf phase (BBCH 18) at a dose of 0.60 dm3∙ha−1, 3. Improver® biostimulant: I term—four-leaf phase (BBCH 14) at a dose of 1.00 dm3∙ha−1, II term—eight-leaf phase (BBCH 18) at a dose of 0.60 dm3∙ha−1, 4. Zeal® biostimulant: I term—six-leaf phase (BBCH 16) at a dose of 2.00 dm3∙ha−1. The aim of the study was to determine the effect of nitrogen fertilization and the use of biostimulants on the size and quality of yield of two varieties of maize grown for grain. Based on the conducted research, it was found that nitrogen doses influenced the amount of maize grain obtained. The highest yields were obtained using 120 kg N∙ha−1. Nitrogen doses significantly affected the studied maize yield components. The dose of 120 kg N∙ha−1 increased the number of grains in the cob, while the dose—160 kg N∙ha−1 exerted the best effect on obtaining the highest values of a thousand seeds. The biostimulants used in the experiment significantly affected the mass of one thousand seeds and the number of grains in the cob. In addition, Asahi®SL, Improver® and Zeal® biostimulants increased maize yield in each growing season studied.

scholarly journals Mapping-by-Sequencing via MutMap Identifies a Mutation in ZmCLE7 Underlying Fasciation in a Newly Developed EMS Mutant Population in an Elite Tropical Maize Inbred

Genes ◽  
2020 ◽  
Vol 11 (3) ◽  
pp. 281 ◽  
Author(s):  
Quan Hong Tran ◽  
Ngoc Hong Bui ◽  
Christian Kappel ◽  
Nga Thi Ngoc Dau ◽  
Loan Thi Nguyen ◽  
...  
Keyword(s):  
Point Mutations ◽  
Gene Discovery ◽  
Forward Genetics ◽  
Tropical Maize ◽  
Mapping Procedure ◽  
The Public ◽  
Rapid Mapping ◽  
Maize Varieties ◽  
Comparable Quality ◽  
Mapping By Sequencing

Induced point mutations are important genetic resources for their ability to create hypo- and hypermorphic alleles that are useful for understanding gene functions and breeding. However, such mutant populations have only been developed for a few temperate maize varieties, mainly B73 and W22, yet no tropical maize inbred lines have been mutagenized and made available to the public to date. We developed a novel Ethyl Methanesulfonate (EMS) induced mutation resource in maize comprising 2050 independent M2 mutant families in the elite tropical maize inbred ML10. By phenotypic screening, we showed that this population is of comparable quality with other mutagenized populations in maize. To illustrate the usefulness of this population for gene discovery, we performed rapid mapping-by-sequencing to clone a fasciated-ear mutant and identify a causal promoter deletion in ZmCLE7 (CLE7). Our mapping procedure does not require crossing to an unrelated parent, thus is suitable for mapping subtle traits and ones affected by heterosis. This first EMS population in tropical maize is expected to be very useful for the maize research community. Also, the EMS mutagenesis and rapid mapping-by-sequencing pipeline described here illustrate the power of performing forward genetics in diverse maize germplasms of choice, which can lead to novel gene discovery due to divergent genetic backgrounds.

Assessment of iron bioavailability from twenty elite late-maturing tropical maize varieties using anin vitro digestion/Caco-2 cell model

2004 ◽  
Vol 84 (10) ◽  
pp. 1202-1206 ◽  
Author(s):  
Sylvester O Oikeh ◽  
Abebe Menkir ◽  
Bussie Maziya-Dixon ◽  
Ross M Welch ◽  
Raymond P Glahn
Keyword(s):  
Cell Model ◽  
Iron Bioavailability ◽  
Tropical Maize ◽  
Maize Varieties

Assessment of nitrogen uptake and utilization in drought tolerant andStrigaresistant tropical maize varieties

2013 ◽  
Vol 60 (2) ◽  
pp. 195-207 ◽  
Author(s):  
Alpha Y. Kamara ◽  
Sylvester U. Ewansiha ◽  
Abebe Menkir
Keyword(s):  
Nitrogen Uptake ◽  
Tropical Maize ◽  
Drought Tolerant ◽  
Maize Varieties

Influence of nitrogen fertilization on the performance of early and late maturing maize varieties under natural infestation withStriga hermonthica(Del.) Benth

2009 ◽  
Vol 55 (2) ◽  
pp. 125-145 ◽  
Author(s):  
Alpha Yaya Kamara ◽  
Friday Ekeleme ◽  
Lucky Omoigui ◽  
Abebe Menkir ◽  
David Chikoye ◽  
...  
Keyword(s):  
Nitrogen Fertilization ◽  
Maize Varieties ◽  
Natural Infestation

Mineral Composition of Six Tropical Grasses as Influenced by Plant Age and Nitrogen Fertilization

1969 ◽  
Vol 61 (1) ◽  
pp. 120-123 ◽  
Author(s):  
J. A. Gomide ◽  
C. H. Noller ◽  
G. O. Mott ◽  
J. H. Conrad ◽  
D. L. Hill
Keyword(s):  
Mineral Composition ◽  
Nitrogen Fertilization ◽  
Plant Age ◽  
Tropical Grasses
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