INFLUENCE DU GENOTYPE ET DU LIEU SUR LE NOMBRE D’OVULES PRESENTS A LA FLORAISON CHEZ LE MAIS

1983 ◽  
Vol 63 (2) ◽  
pp. 371-375
Author(s):  
M. DERIEUX ◽  
J.-B. DUBURCQ ◽  
R. BONHOMME ◽  
F. RUGET ◽  
P. VINCOURT
Keyword(s):  
Zea Mays ◽  
Zea Mays L ◽  
Environment Interaction ◽  
Northern Limit ◽  
Southeastern Part ◽  
Heat Units ◽  
Genotype Environment Interaction ◽  
Ovule Number

The number of ovules of the first ear of maize (Zea mays L.) at silking time was studied on three single crosses ranging from very early flint to late maturing, in three locations, from the northern limit of culture for grain to good irrigated conditions of the southeastern part of France. The results show that the ovule number is mainly determined by genotypes and increases with lateness; means are as follows: F7 × F2, 338; WH × WJ, 448; W64A × F546, 589 ovules. The variation among environments is characterized by a CV of 9% but is not significant. Nevertheless a part of this variation seems to be explained by the duration, in terms of heat units, of the sowing-silking period.Key words: Zea mays L., ovule number, genotype-environment interaction

scholarly journals Evaluación de híbridos de maíz (Zea mays L.) de grano blanco y amarillo en ambientes de Centroamérica, Panamá y el Caribe en 1996.

2016 ◽  
Vol 9 (1) ◽  
pp. 28 ◽  
Author(s):  
Adán Aguiluz
Keyword(s):  
Zea Mays ◽  
Zea Mays L ◽  
Environment Interaction ◽  
Genotype Environment Interaction ◽  
Ammi Model ◽  
White Grain ◽  
National Programs ◽  
And Control ◽  
Main Effects

Thirty white-grain hybrids in 1210cations and 20 yellow-grain hybrids in 14 locations were evaluated in 1996. The control HB-83 was used for white grains, and control HB-46 was used for yellow grains. Measurement of genotype/environment interaction was obtained through the analysis of additive main effects and multiplicative in~eractions (AMMI model). White hybrids A- 7573, H-53, HN-951, A-7530, CB- XHS-7GMl and CML- 9XCML-47 equaled or surpassed the HB-83 control in 17,8%; 0,1%; 1,1%; 9,2%; 8,1% and 18,7% ofthe cases, respectively, showing little interaction with the environment (AMMI values close to O). Two of these hybrids are from national programs, and three from private seed companies. As for the yellow grains, only the CB-XHS-8GM3, HS-6 and DK-888A hybrids surpassed the control HA-46 in yield, and showed AMMI scores c10se to O: (0,20; -0,07 and -0,12, respectively); all of these belong to private seed companies.

Genotype × environment interaction and selection of maize (Zea mays L.) hybrids across moisture regimes

2021 ◽  
Vol 270 ◽  
pp. 108224
Author(s):  
Ashok Singamsetti ◽  
J.P. Shahi ◽  
P.H. Zaidi ◽  
K. Seetharam ◽  
M.T. Vinayan ◽  
...  
Keyword(s):  
Zea Mays ◽  
Zea Mays L ◽  
Environment Interaction ◽  
Genotype Environment Interaction ◽  
Moisture Regimes ◽  
Selection Of

scholarly journals Statistical models for evaluating the genotype-environment interaction in maize (Zea mays L.)

Phyton ◽  
2010 ◽  
Vol 79 (1) ◽  
pp. 39-46 ◽  
Author(s):  
Kandus M ◽  
D Almorza ◽  
R Boggio Ronceros ◽  
JC Salerno
Keyword(s):  
Zea Mays ◽  
Statistical Models ◽  
Zea Mays L ◽  
Environment Interaction ◽  
Genotype Environment Interaction

Inheritance of resistance to Mal de Río Cuarto (MRC) disease in Zea mays (L.)

2002 ◽  
Vol 139 (1) ◽  
pp. 47-53 ◽  
Author(s):  
M. A. DI RENZO ◽  
N. C. BONAMICO ◽  
D. D. DÍAZ ◽  
J. C. SALERNO ◽  
M. M. IBAÑEZ ◽  
...  
Keyword(s):  
Zea Mays ◽  
Plant Height ◽  
Disease Severity ◽  
Agronomic Traits ◽  
Severity Index ◽  
Point Estimate ◽  
Environment Interaction ◽  
Disease Severity Index ◽  
Evaluation Activity ◽  
Genotype Environment Interaction

No genetic estimates for resistance to Mal de Río Cuarto (MRC) disease in Zea mays (L.) are currently available in the literature. Therefore, the objectives of this investigation were (i) to estimate the variance and heritability of partial resistance to MRC disease and of other agronomic traits from maize families and (ii) to examine associations among MRC disease severity values across different environments and between MRC and other agronomic traits. These estimations, obtained in an endemic area, could contribute to the design of efficient enhancement programmes and evaluation activity for the improvement of MRC resistance. The research was conducted by testing 227 F3 derived-lines from a cross between a susceptible dent line, Mo17, and a partially resistant flint line, BLS14, for MRC disease at two Río Cuarto locations in each of 2 years. The resistance of the lines, measured with a disease severity index (DSI), was normally distributed across environments. Genotypic variances were highly significant on all scoring environments. Estimates of genotype–environment interaction were also significant, suggesting that certain genotypes have little stability over different environments. For disease severity index all estimates demonstrated moderate heritabilities ranging from 0.44 to 0.56 and were similar when based on individual environments or across environment. Confidence interval widths ranged from 34.88 to 50.30% as large as the heritability point estimate. The correlations between environments were small enough to indicate that families did not rank similarly in individual environments for MRC resistance. Disease severity index correlated significantly (P<0.01) with plant height, leaf surface, leaf border, leaf length and tassel type. Heritability estimates for plant height and tassel type were 0.48 and 0.38 respectively and for the various leaf traits heritability values were very low. On the basis of the substantial genotype–environment interaction and the little association between DSI values in the different environments, selection for an increased resistance to MRC disease would require evaluation of germplasm across multiple years and locations. Tassel type would be a useful predictor of DSI and can be used effectively to improve screening procedures.

scholarly journals Evaluation of CIMMYT maize (Zea mays L.) germplasm by tropical inbred testers

2015 ◽  
Vol 43 (2) ◽  
pp. 131-139
Author(s):  
Uttam Chandel ◽  
BS Mankotia ◽  
KS Thakur
Keyword(s):  
Zea Mays ◽  
Inbred Line ◽  
Zea Mays L ◽  
Inbred Lines ◽  
Environment Interaction ◽  
Tropical Maize ◽  
Selected Lines ◽  
Heterotic Groups

Twenty five CIMMYT inbreds were crossed with four elite tropical maize testers. Results exhibited that one inbred line tester can select the top best lines from a large number of CIMMYT lines and two testers gave more reliable results than one tester did. However, when line × environment interaction was significant, selected lines by one tester in one environment were not necessarily same as those selected at another environment indicating thereby that different testers should be used for selecting best inbreds at different environments. This study also showed that inbred lines from different maize heterotic groups did not show any significant differences in identifying best CIMMYT germplasm DOI: http://dx.doi.org/10.3329/bjb.v43i2.21661 Bangladesh J. Bot. 43(2): 131-139, 2014 (September)

Hybrid and population density affect yield and quality of silage maize in central Alberta

2007 ◽  
Vol 87 (4) ◽  
pp. 867-871 ◽  
Author(s):  
D. Stanton ◽  
A. W. Grombacher ◽  
R. Pinnisch ◽  
H. Mason ◽  
D. Spaner
Keyword(s):  
Zea Mays ◽  
Zea Mays L ◽  
North Central ◽  
Heat Units ◽  
Silage Maize ◽  
Yield And Quality ◽  
Northern Latitudes ◽  
Early Maturing ◽  
Plant Densities

Four maize (Zea mays L.) hybrids planted at varying plant densities were evaluated for their yield, maturity, and quality across environments in north central Alberta. Given the balance of yield and quality, very early maturing hybrids [2000 corn heat units (CHU)] planted at ~100 000 plants ha-1 are recommended for north central Alberta. Key words: Corn; Zea mays L.; northern latitudes; corn heat units

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