Selection of maize hybrids for tolerance to aluminum in minimal solution

This paper proposes an alternative method for evaluating the stability and adaptability of maize hybrids using a genotype-ideotype distance index (GIDI) for selection. Data from seven variables were used, obtained through evaluation of 25 maize hybrids at six sites in southern Brazil. The GIDI was estimated by means of the generalized Mahalanobis distance for each plot of the test. We then proceeded to GGE biplot analysis in order to compare the predictive accuracy of the GGE models and the grouping of environments and to select the best five hybrids. The G × E interaction was significant for both variables assessed. The GGE model with two principal components obtained a predictive accuracy (PRECORR) of 0.8913 for the GIDI and 0.8709 for yield (t ha−1). Two groups of environments were obtained upon analyzing the GIDI, whereas all the environments remained in the same group upon analyzing yield. Coincidence occurred in only two hybrids considering evaluation of the two features. The GIDI assessment provided for selection of hybrids that combine adaptability and stability in most of the variables assessed, making its use more highly recommended than analyzing each variable separately. Not all the higher-yielding hybrids were the best in the other variables assessed.

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Selection of S3 progenies of forage maize based on topcrosses with different testers

Acta Scientiarum Agronomy ◽

10.4025/actasciagron.v43i1.51223 ◽

2021 ◽

Vol 43 ◽

pp. e51223

Author(s):

Carlos Augusto da Silva ◽

Marcos Ventura Faria ◽

Elida Auxiliadora Peralta Paiva ◽

Welton Luiz Zaluski ◽

Emanuel Gava ◽

...

Keyword(s):

Dry Matter ◽

Production Systems ◽

Neutral Detergent Fiber ◽

Dry Matter Yield ◽

Forage Maize ◽

Maize Hybrids ◽

Topcross Hybrids ◽

Selection Of ◽

Partial Diallel

Maize forage is commonly used as silage in milk and beef cattle livestock production systems. Despite the wide variety of maize hybrids with high potential for grain production, few available hybrids have been developed exclusively for forage aptitude. The present study aimed to select S3 maize progenies derived from the single hybrid AS1572 based on the combining ability of forage traits in topcrosses with testers AG8025, 70.H26.1, and MLP102. The 135 resulting topcross hybrids were assessed in partial diallel in Guarapuava and Rio Bonito do Iguaçu, Paraná State, Brazil. Were evaluated the contents of neutral detergent fiber (NDF, %DM) and acid detergent fiber (ADF, %DM), forage dry matter yield (DMY, t ha-1), and in situ digestibility of forage dry matter (DIG, %DM). For all evaluated traits, the variability allowed us to select superior progenies. Progenies 3.1, 22.1, and 39.1stood out in terms of NDF, ADF, and DIG, whereas progenies 47.1, 73.1, 79.1, and 90.2 were efficient in increasing the forage dry matter yield. The testers AG8025 and 70.H26.1, of narrow genetic base, are the best to explore genetic variability among progenies.

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Increase in photosynthesis of maize hybrids (Zea mays L.) at suboptimal temperature (15 °C) by selection of parental lines on the basis of chlorophyll a fluorescence measurements

Photosynthetica ◽

10.1007/s11099-005-5134-0 ◽

2005 ◽

Vol 43 (1) ◽

pp. 125-134 ◽

Cited By ~ 8

Author(s):

J. Koscielniak ◽

F. Janowiak ◽

Z. Kurczych

Keyword(s):

Zea Mays ◽

Chlorophyll A ◽

Chlorophyll A Fluorescence ◽

Zea Mays L ◽

Maize Hybrids ◽

Suboptimal Temperature ◽

Fluorescence Measurements ◽

Parental Lines ◽

Selection Of

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Correlation between quantitative traits that affect grain yield of maize hybrids

Grain Economy of Russia ◽

10.31367/2079-8725-2021-78-6-27-32 ◽

2021 ◽

pp. 27-32

Author(s):

G. Ya. Krivosheev ◽

A. S. Ignatiev

Keyword(s):

Grain Yield ◽

Quantitative Traits ◽

Agricultural Research ◽

Grain Weight ◽

Maize Hybrids ◽

Rostov Region ◽

Arid Conditions ◽

1000 Grain Weight ◽

Maize Ear ◽

Selection Of

The selection of pairs for hybridization requires knowledge about the correlation of the most important quantitative traits that affect grain yield of maize hybrids. The current study was carried out in the Agricultural Research Center “Donskoy” located in the south of the Rostov region with unstable moisture. The years of study (2018–2020) were arid (HThC 0.32–0.89). The purpose of the current study was to evaluate the correlation between quantitative traits and their influence on grain yield of maize hybrids under arid conditions. The objects of research were 96 interline maize hybrids. The analysis has identified the correlation between grain yield and such quantitative traits as ‘one maize ear weight’ (r = 0.64...0.87), ‘number of grains per one maize ear row’ (r = 0.37...0.75), ‘number of grains per maize ear’ (r = 0.32...0.51), ‘number of maize ears per plant’ (r = 0.41...0.53), ‘grain yield’ (r = 0.45...0.64). The traits ‘1000-grain weight’ and ‘number of grain rows’ had either no or slight effect on the formation of grain yield of maize hybrids (r = -0.12...0.28). There have been established the traits, the high values of which were well-combining in one genotype. The values of the trait ‘one maize ear weight’ raised due to an increase of the trait ‘number of grains per one maize ear row’ (r = 0.27...0.74), ‘number of grains per maize ear’ (r = 0.26...0.55), ‘grain yield’ (r = 0.21...0.52). The trait ‘number of grains per maize ear’ raised with an increase in the values of such constituent components as ‘number of grains per one maize ear row’ (r = 0.70...0.76), ‘number of grain rows per maize ear’ (r = 0.59...0.66), and also with an increase of ‘number of maize ears per plant’ (r = 0.32...0.51) and ‘grain yield’ (r = 0.36...0.38). There have been identified difficulty-combining quantitative traits, when the value of the trait ‘1000-grain weight’ decreased with the increase of the ‘number of grain rows per maize ear’ (r = – 0.18...-0.56), ‘number of grains per a maize ear row’ (r = -0.15...-0.31) and ‘grain yield’ (r = -0.01...-0.36).

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Selection of maize hybrids with risk-examination method

Cereal Research Communications ◽

10.1007/bf03543581 ◽

2000 ◽

Vol 28 (1-2) ◽

pp. 109-115

Author(s):

P. Drimba ◽

J. Nagy ◽

O. Sum

Keyword(s):

Maize Hybrids ◽

Examination Method ◽

Selection Of

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Evaluation of promising maize hybrids in different Regions of Bangladesh

Bangladesh Journal of Agricultural Research ◽

10.3329/bjar.v43i2.37333 ◽

2018 ◽

Vol 43 (2) ◽

pp. 301-307

Author(s):

ANMS Karim ◽

S Ahmed ◽

AH Akhi ◽

MZA Talukder ◽

TA Mujahidi

Keyword(s):

Significant Variation ◽

Interaction Model ◽

Environment Interaction ◽

Maize Hybrids ◽

Genotype Environment Interaction ◽

Single Cross ◽

The Mean ◽

Different Response ◽

Main Effects ◽

Selection Of

Nine single cross promising maize hybrids and three check varieties (NK40, BHM9 and 900 MGold) were assessed for genotype environment interaction (GEI) and stability for the selection of promising one(s) in seven different locations of Bangladesh. The AMMI (additive main effects and multiplicative interaction) model was used to analyze the genotype-environment interaction over seven locations to select desired hybrid having higher yield and other potential attributes. Regarding genotypes (G), significant variation was found in all the characters except yield while environment (E) was found significant for all the characters. The environment of Gazipur was poor; Jamalpur, Hathazari, Ishurdi, Rahmatpur, Burirhat, and Jessore were positive environments for tested maize hybrids. Considering the mean, bi and S2di for all the parameters, it was evident that all the genotypes showed different response of adaptability under different environmental conditions. Among the hybrids E12 (900MG), E7(CML502 × CML491), E1(BIL95 × BIL28), E10 (NK40) and E2 (BIL95 × BIL31) were exhibited high yielder.Considering bi ̴1(regression co-efficient), S2di ̴ 0 (deviation from regression)and mean versace IPCA1 (fig1)indicated that hybrids E7and E1showed the higher yield as well as stable across locations.Bangladesh J. Agril. Res. 43(2): 301-307, June 2018

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Performance evaluation and selection of new maize hybrids under sole and inter crop production systems

Journal of Plant Breeding and Crop Science ◽

10.5897/jpbcs2020.0898 ◽

2020 ◽

Vol 12 (3) ◽

pp. 219-227

Author(s):

Muluneh Mekasha Goshime ◽

Admassu Seyoum Solomon ◽

Zemede Lemma Alemayehu

Keyword(s):

Performance Evaluation ◽

Crop Production ◽

Production Systems ◽

Maize Hybrids ◽

Selection Of

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The genotype role in maize competitive ability

Genetika ◽

10.2298/gensr0901059s ◽

2009 ◽

Vol 41 (1) ◽

pp. 59-67 ◽

Cited By ~ 3

Author(s):

Milena Simic ◽

Zeljko Dolijanovic ◽

Radojka Maletic ◽

Milomir Filipovic ◽

Nikola Grcic

Keyword(s):

Leaf Area ◽

Weed Management ◽

Competitive Ability ◽

Morphological Properties ◽

Integrated Weed Management ◽

Maize Hybrids ◽

Competitive Effects ◽

Competitive Activity ◽

Weed Infestation ◽

Selection Of

Growing competitive crops is an important component of the integrated weed management system, although selection of genotypes with the increased competitive ability is rather difficult. The possibility of reducing weed infestation by increasing the competitive activity of crops by growing genotypes, i.e. hybrids that better 'endure' a greater density, depends on the FAO maturity group and morphological properties of a genotype, environmental conditions and the growing regions. The competition between maize and weeds varies over the modified crop arrangement pattern. The greatest weed infestation is recorded in the crops of the sparse-spaced plants, while the height and the weight of weeds are significantly lower in closely-spaced plants. The height, growth intensity in the initial stages, embryo vigour and leaf area of the plant are important for a greater competitive ability, as they are components of competitive effects of crops on weeds. Weed infestation and maize hybrids yielding were studied in dependence on the hybrids arrangement pattern and the application of herbicides. Obtained results show statistically significant differences in the weed fresh weight, but only in certain years and in accordance with differences in the height and the leaf area of ZP maize hybrids.

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