scholarly journals Pattern in interaction in the maize yield trial

2011 ◽  
Vol 56 (2) ◽  
pp. 101-110
Author(s):  
Vojka Babic ◽  
Milosav Babic ◽  
Mile Ivanovic ◽  
Milomir Filipovic
Keyword(s):  
Hybrid Model ◽  
Interaction Effect ◽  
Interaction Analysis ◽  
Maize Yield ◽  
Small Region ◽  
Maize Hybrids ◽  
Genotype By Environment ◽  
Genotype Effect ◽  
Yield Trial ◽  
Main Effect

In making decisions on the development of varieties and the identification of certain growing regions, the effects of genotype (G) and genotype by environment (GxE) are very important. Although the main genotype effect and the interaction effect should be partitioned, there is still a need for their integration in the yield, as both simultaneously affect a ranking of the particular genotype within a certain environment. The AMMI (Additive Main Effect and Multiplicative Interaction) analysis, as a hybrid model, provides appropriate partitioning. The AMMI2 model, capturing 98.4% of the treatment sum of squares, was used, and 12 observed environments were classified into three target environments. Hence, out of 15 commercial maize hybrids, used in the trial, the hybrids ZP-677, ZP-570 and ZP-732 were selected as carriers of maximum yields in three target environments. In this way, it was shown that even in a relatively small region a narrow adaptation of genotypes can be exploited.

scholarly journals Stability of Maize Hybrids across Environments Using Gge Biplot and Ammi Analysis

2019 ◽  
Vol 8 (2) ◽  
pp. 188-194
Author(s):  
Saleem Abid ◽  
Saleem Zahid
Keyword(s):  
Total Yield ◽  
Principal Component ◽  
Maize Yield ◽  
Genotype By Environment Interaction ◽  
Environment Interaction ◽  
Gge Biplot ◽  
Maize Hybrids ◽  
Genotype By Environment ◽  
Yield Variation ◽  
Ammi Analysis

Twenty six yellow maize hybrids on the basis of stability analysis were evaluated in National Uniform Maize Hybrid Yield Trials conducted across eight diversified environments of Pakistan. Combined analysis of variance based AMMI analysis shown highly significant differences for environments, genotypes and their interactions. The environments explained about 78 percent of the total yield variation followed by genotype by environment interaction. Environment was the main aspect that influences the performance of maize yield in study area. The first two interaction principal component axes (IPCA1 and IPCA2) explained about 63 percent of the grain yield variation due to genotype and genotype by environment interaction (GGE). The GGE biplot analysis shown that entry-2 (Mex-YLHY2) was the most stable hybrid and can be considered as adaptable to all the environments.

scholarly journals Circulating MicroRNA: Incident Asthma Prediction and Vitamin D Effect Modification

2021 ◽  
Vol 11 (4) ◽  
pp. 307
Author(s):  
Jiang Li ◽  
Anshul Tiwari ◽  
Hooman Mirzakhani ◽  
Alberta L. Wang ◽  
Alvin T. Kho ◽  
...  
Keyword(s):  
Vitamin D ◽  
Logistic Regression ◽  
Interaction Effect ◽  
Target Genes ◽  
Interaction Analysis ◽  
Meta Analysis ◽  
Circulating Microrna ◽  
Recurrent Wheezing ◽  
Main Effect ◽  
Incident Asthma

Of children with recurrent wheezing in early childhood, approximately half go on to develop asthma. MicroRNAs have been described as excellent non-invasive biomarkers due to their prognostic utility. We hypothesized that circulating microRNAs can predict incident asthma and that that prediction might be modified by vitamin D. We selected 75 participants with recurrent wheezing at 3 years old from the Vitamin D Antenatal Asthma Reduction Trial (VDAART). Plasma samples were collected at age 3 and sequenced for small RNA-Seq. The read counts were normalized and filtered by depth and coverage. Logistic regression was employed to associate miRNAs at age 3 with asthma status at age 5. While the overall effect of miRNA on asthma occurrence was weak, we identified 38 miRNAs with a significant interaction effect with vitamin D and 32 miRNAs with a significant main effect in the high vitamin D treatment group in VDAART. We validated the VDAART results in Project Viva for both the main effect and interaction effect. Meta-analysis was performed on both cohorts to obtain the combined effect and a logistic regression model was used to predict incident asthma at age 7 in Project Viva. Of the 23 overlapped miRNAs in the stratified and interaction analysis above, 9 miRNAs were replicated in Project Viva with strong effect size and remained in the meta-analysis of the two populations. The target genes of the 9 miRNAs were enriched for asthma-related Kyoto Encyclopedia of Genes and Genomes (KEGG) signaling pathways. Using logistic regression, microRNA hsa-miR-574-5p had a good prognostic ability for incident asthma prognosis with an area under the receiver operating characteristic (AUROC) of 0.83. In conclusion, miRNAs appear to be good biomarkers of incident asthma, but only when vitamin D level is considered.

scholarly journals Assessment of genotype-by-environment interactions of white quality protein maize hybrids in Bangladesh

2017 ◽  
Vol 42 (2) ◽  
pp. 259-271
Author(s):  
ABM Khaldun ◽  
BR Banik ◽  
MAL Akanda ◽  
KAMM Rahman ◽  
MM Rahman
Keyword(s):  
Environmental Conditions ◽  
Quality Protein Maize ◽  
Stability Parameters ◽  
Maize Hybrids ◽  
Genotype By Environment ◽  
Environment Model ◽  
High Responsiveness ◽  
Main Effect ◽  
Days To Maturity ◽  
Multiplicative Effects

Present study assessed genotypes and their interactions with environments (GEI) for plant height, days to maturity and grain yield of 40 maize hybrids including two local checks across five different locations of Bangladesh. Thirty eight white QPM (Quality Protein Maize) hybrids were collected from CIMMYT, Mexico. The AMMI (additive main effect and multiplicative interactions) and GGE (genotype + genotype × environment) model were used to assess the additive and multiplicative effects of the interactions. Significant variations were found for genotypes (G), environments (E) and GEI for all the studied characters. The environment of Gazipur is poor while those of Ishurdi and Rangpur are rich for QPM hybrids production. Considering three parameters viz., mean, bi and S2di, it was evident that all the genotypes showed different responses of adaptability under different environmental conditions. Among the hybrids E21, E23, E30 and E22 exhibited bi~1 and S2di~0 for all the characters under study, which clearly indicated that the hybrids are stable across the environments. The hybrids E11, E25, E37 and E4 had bi value significantly different from the unity with non significant S2di value for one or more characters studied, indicating high responsiveness of the hybrid but suitable for favorable environments only. E5 was a good yielder and stable over environments. Considering the yield potentiality and stability parameters five hybrids were found promising over the locationsBangladesh J. Agril. Res. 42(2): 259-271, June 2017

scholarly journals The differential effects of related and unrelated emotions on judgments about media messages

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Rinaldo Kühne ◽  
Claudia Poggiolini ◽  
Werner Wirth
Keyword(s):  
Experimental Study ◽  
Interaction Effect ◽  
News Article ◽  
Differential Effects ◽  
Media Messages ◽  
Processing Depth ◽  
Main Effect ◽  
The Media ◽  
Media Message

AbstractThe present study investigated the influence of related and unrelated emotions on judgments about a news article. An experimental study was designed to manipulate both the relatedness of an elicited emotion (i. e., anger) to the news article and processing depth. Following mood and emotion effects theory, related anger was expected to have a stronger effect on judgments about the media message than unrelated anger. Processing depth was expected to moderate this effect. The results showed a main effect of relatedness and a main effect of processing depth, but the interaction effect was not found. Implications of the findings for understanding how emotions influence the processing of media stimuli are discussed.

scholarly journals Genotype and environment interaction of sweetpotato varieties

2019 ◽  
Vol 44 (3) ◽  
pp. 501-512
Author(s):  
S Sultana ◽  
HC Mohanta ◽  
Z Alam ◽  
S Naznin ◽  
S Begum
Keyword(s):  
Tuber Yield ◽  
Agricultural Research ◽  
Genotype By Environment Interaction ◽  
Yield Potential ◽  
Environment Interaction ◽  
Dry Matter Content ◽  
Genotype By Environment ◽  
Discriminating Power ◽  
Study Results ◽  
Main Effect

The article presents results of additive main effect and multiplicative interaction (AMMI) and genotype (G) main effect and genotype by environment (GE) interaction (G × GE) biplot analysis of a multi environmental trial (MET) data of 15 sweetpotato varieties released from Bangladesh Agricultural Research Institute conducted during 2015–2018. The objective of this study was to determine the effects of genotype, environment and their interaction on tuber yield and to identify stable sweetpotato genotypes over the years. The experimental layout was a randomized complete block design with three replications at Gazipur location. Combined analysis of variance (ANOVA) indicated that the main effects due to genotypes, environments and genotype by environment interaction were highly significant. The contribution of genotypes, environments and genotype by environment interaction to the total variation in tuber yield was about 60.16, 10.72 and 12.82%, respectively. The first two principal components obtained by singular value decomposition of the centred data of yield accounted for 100% of the total variability caused by G × GE. Out of these variations, PC1 and PC2 accounted for 71.5% and 28.5% of variability, respectively. The study results identified BARI Mistialu- 5, BARI Mistialu- 14 and BARI Mistialu- 15 as the closest to the “ideal” genotype in terms of yield potential and stability. Varieties ‘BARI Mistialu- 8, BARI Mistialu- 11 and BARI Mistialu- 12’ were also selected as superior genotypes. BARI Mistialu- 3 and BARI Mistialu- 13 was comparatively low yielder but was stable over the environment. Among them BARI Mistialu-12, BARI Mistialu-14 and BARI Mistialu-15 are rich in nutrient content while BARI Mistialu-8 and BARI Mistialu-11 are the best with dry matter content and organoleptic taste. Environments representing in 1st and 3rd year with comparatively short vectors had a low discriminating power and environment in 2nd year was characterized by a high discriminating power. Bangladesh J. Agril. Res. 44(3): 501-512, September 2019

Stability Analysis of Agronomic Traits for Maize (Zea Mays L.) Genotypes Based on Ammi Model

2021 ◽  
Vol 50 (2) ◽  
pp. 343-350
Author(s):  
Meijin Ye ◽  
Zhaoyang Chen ◽  
Bingbing Liu ◽  
Haiwang Yue
Keyword(s):  
Grain Yield ◽  
Agronomic Traits ◽  
Interaction Model ◽  
Genotype By Environment Interaction ◽  
Kernel Weight ◽  
Environment Interaction ◽  
Maize Hybrids ◽  
Genotype By Environment ◽  
Ammi Model ◽  
The Ideal

Stability and adaptability of promising maize hybrids in terms of three agronomic traits (grain yield, ear weight and 100-kernel weight) in multi-environments trials were evaluated. The analysis of AMMI model indicated that the all three agronomic traits showed highly significant differences (p < 0.01) on genotype, environment and genotype by environment interaction. Results showed that genotypes Hengyu321 (G9), Yufeng303 (G10) and Huanong138 (G3) were of higher stability on grain yield, ear weight and 100-kernel weight, respectively. Genotypes Hengyu1587 (G8) and Hengyu321 (G9) showed good performance in terms of grain yield, whereas Longping208 (G2) and Weike966 (G12) showed broad adaptability for ear weight. It was also found that the genotypes with better adaptability in terms of 100-kernel weight were Zhengdan958 (G5) and Weike966 (G12). The genotype and environment interaction model based on AMMI analysis indicated that Hengyu1587 and Hengyu321 were the ideal genotypes, due to extensive adaptability and high grain yield under both testing sites. Bangladesh J. Bot. 50(2): 343-350, 2021 (June)

scholarly journals Theming, Co-Creation, and Quality of Structured Experiences at Camp

2019 ◽  
Vol 14 (1) ◽  
pp. 230-242 ◽  
Author(s):  
Gary D. Ellis ◽  
Jingxian Jiang ◽  
Andrew Lacanienta ◽  
Mark Carroll
Keyword(s):  
Lived Experience ◽  
Interaction Effect ◽  
Quality Of Experience ◽  
Summer Camp ◽  
Secondary Analysis ◽  
Follow Up Study ◽  
Main Effect ◽  
Strong Main Effect

Lacanienta and his colleagues (2018) recently reported results of a study of the effect of themes on quality of experience of youths during summer camp activities. Existing literature suggested that theming activity sessions would have a strong main effect. Results, though, revealed an activity-by-theme interaction effect, i.e., themes seem to be effective in some activities but not others. In this follow-up study, we describe results of a secondary analysis revealing significant new insights regarding theme. Adding an indicator of campers’ co-created, lived-experience theme into the models tested substantially clarified how objective theme, lived-experience theme, and activity interact in influencing the quality of structured experiences. This study, then, underscores the importance of including measures of participants’ co-created lived experience as we seek to understand techniques that can be used to enhance the quality of youths’ structured camp experiences.

scholarly journals Solar Radiation Effects on Dry Matter Accumulations and Transfer in Maize

2021 ◽  
Vol 12 ◽  
Author(s):  
Yunshan Yang ◽  
Xiaoxia Guo ◽  
Guangzhou Liu ◽  
Wanmao Liu ◽  
Jun Xue ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Radiation Effects ◽  
Dry Matter ◽  
Field Experiments ◽  
Maize Yield ◽  
Planting Density ◽  
Stay Green ◽  
Vegetative Organs ◽  
Maize Hybrids ◽  
Weak Light

Solar radiation is the energy source for crop growth, as well as for the processes of accumulation, distribution, and transfer of photosynthetic products that determine maize yield. Therefore, learning the effects of different solar radiation amounts on maize growth is especially important. The present study focused on the quantitative relationships between solar radiation amounts and dry matter accumulations and transfers in maize. Over two continuous years (2017 and 2018) of field experiments, maize hybrids XY335 and ZD958 were grown at densities of 4.5 × 104 (D1), 7.5 × 104 (D2), 9 × 104 (D3), 10.5 × 104 (D4), and 12 × 104 (D5) plants/ha at Qitai Farm (89°34′E, 44°12′N), Xinjiang, China. Shading levels were 15% (S1), 30% (S2), and 50% (S3) of natural light and no shading (CK). The results showed that the yields of the commonly planted cultivars XY335 and ZD958 at S1, S2, and S3 (increasing shade treatments) were 7.3, 21.2, and 57.6% and 11.7, 31.0, and 61.8% lower than the control yields, respectively. Also, vegetative organ dry matter translocation (DMT) and its contribution to grain increased as shading levels increased under different densities. The dry matter assimilation amount after silking (AADMAS) increased as solar radiation and planting density increased. When solar radiation was &lt;580.9 and 663.6 MJ/m2, for XY335 and ZD958, respectively, the increase in the AADMAS was primarily related to solar radiation amounts; and when solar radiation was higher than those amounts for those hybrids, an increase in the AADMAS was primarily related to planting density. Photosynthate accumulation is a key determinant of maize yield, and the contributions of the vegetative organs to the grain did not compensate for the reduced yield caused by insufficient light. Between the two cultivars, XY335 showed a better resistance to weak light than ZD958 did. To help guarantee a high maize yield under weak light conditions, it is imperative to select cultivars that have great stay-green and photosynthetic efficiency characteristics.

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