Analysis of yield and yield attributing traits of maize genotypes in Chitwan, Nepal

Ghimire, Bikal

doi:10.4172/2157-7110.c1.060

Cited by 19 publications

(39 citation statements)

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“…Koirala and Gurung (2002) recorded days to silking varied from 72 to 77 days, 198 to 230.0 cm plant height and a similar range of values for ear length. Similar findings were also reported by Borras et al (2007), Baqa et al (2014) and Ghimire and Timsina (2015) for days to silking. Present investigation showed that 1000-grain weight results were closer to the findings of Koirala and Gurung (2002) and Sabeena and Dar (2005), who reported a wide range of variability for 1000 grain weight, values ranged from 340 to 325 g. Similarly, significant variations for grain yield were reported by other investigations (Mubeen et al, 2015;Charles et al, 2013;Adebayo and Menkir, 2015).…”

Section: Discussionsupporting

confidence: 91%

Characterization of Zea Mays L. Through Morphological, Biochemical and Molecular Markers

Rahim¹

2019

Appl. Ecol. Env. Res.

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18 open-pollinated maize accessions were assessed for variability under randomized complete block design with 3 replications. Each plot comprised of two rows each 5 m in length with a plant to plant distance of 30 cm and a row to row distance of 75 cm. Data on morpho-biochemical traits were collected and subjected to statistical analysis to find out the variability among the maize accessions and association of increasing protein and oil content with the agronomic traits. From the source population 5 varieties with a high percentage of oil and protein, were selected and analyzed for total seed protein profile using Sodium Dodecyl Sulphate Polyacrylamide Gel Electrophoresis. Significant results of variance and covariance were observed for all morpho-biochemical traits, which revealed significant variation among the maize accessions. SDS-PAGE showed considerable variation in protein banding among the maize accessions. Correlation results showed an independent association of morphological traits with oil and protein contents in almost all the source population. This indicated that oil and protein content of maize grain can be increased without negatively affecting the important agronomic traits. Based on the results, the variability could be utilized to develop commercial maize varieties with improved quality of grain utilizing the conventional techniques of selection and hybridization.

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Section: Discussionsupporting

confidence: 91%

Characterization of Zea Mays L. Through Morphological, Biochemical and Molecular Markers

Rahim¹

2019

Appl. Ecol. Env. Res.

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“…GY showed a positive correlation with TGW and EW in early maturing and super-early maturing genotypes (Table 3). These results are similar to those reported by Ghimire & Timsina (2015). EW showed a positive correlation of r = 0.993 and r = 0.991 with GY for early maturing and super-early maturing genotypes, respectively, corroborating the results of Mhoswa et al (2016) and Ghimire & Timsina (2015).…”

Section: Resultssupporting

confidence: 82%

Linear associations among phenological, morphological, productive, and energetic-nutritional traits in corn

Alves

Filho

Burin

et al. 2017

Pesq. agropec. bras.

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-The objective of this work was to verify if there is linear dependence between the phenological, morphological, and productive traits and the energetic-nutritional ones in early maturing and super-early maturing corn genotypes. A total of 36 early maturing and 22 super-early maturing corn genotypes were evaluated in a randomized complete block design with three replicates, and the phenological, morphological, productive, and energetic-nutritional traits were measured. The matrix of phenotypic correlation coefficients among traits was determined; the multicollinearity diagnosis was carried out within each group of traits; and the canonical correlation analysis was performed. Linear dependence was observed between the groups of phenological, morphological, and productive traits and of the energetic-nutritional ones. In early maturing genotypes, significant canonical correlation shows the existence of linear dependence between the morphological and energetic-nutritional traits. The significant canonical pair shows that taller plants have lower amylose contents in the grains and reduced nitrogen-corrected apparent metabolizable energy. In super-early maturing genotypes, significant canonical correlations of the phenological, morphological, and productive traits with the energetic-nutritional ones indicate that a greater number of days from sowing to female flowering and ear insertion height, as well as a lower number of ears, increase ether extract contents in the grains.Index terms: Zea mays, chemical composition, multivariate analysis. Associações lineares entre caracteres fenológicos, morfológicos, produtivos e nutricionais energéticos em milhoResumo -O objetivo deste trabalho foi verificar se há dependência linear entre caracteres fenológicos, morfológicos e produtivos e os nutricionais energéticos, em genótipos de milho de ciclo precoce e superprecoce. Foram avaliados 36 genótipos de milho de ciclo precoce e 22 de ciclo superprecoce, em delineamento de blocos ao acaso, com três repetições, tendo-se mensurado caracteres fenológicos, morfológicos, produtivos e nutricionais energéticos. Foi determinada a matriz de coeficientes de correlação fenotípica entre os caracteres; realizado o diagnóstico de multicolinearidade em cada grupo de caracteres; e feita a análise de correlação canônica. Observou-se dependência linear entre os grupos de caracteres fenológicos, morfológicos e produtivos e os de caracteres nutricionais energéticos. Em genótipos de ciclo precoce, a correlação canônica significativa mostra a existência de dependência linear entre os caracteres morfológicos e os nutricionais energéticos. O par canônico significativo mostra que plantas mais altas apresentam menor teor de amilose nos grãos e redução da energia metabolizável aparente corrigida para nitrogênio. Em genótipos de ciclo superprecoce, as correlações canônicas significativas dos caracteres fenológicos, morfológicos e produtivos com os nutricionais energéticos indicam que os aumentos no número de dias da semeadura até o florescimento fem...

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“…In such cases, correlated selection differential may be used for prediction of indirect selection accuracy (Bos & Caligari, 2008). High heritability of ear characteristics found in this study could be used as a means for improving yield, proposed also by other researchers (Ross, 2002;Ghimire & Timsina, 2015). Many reports on certain traits' correlations, not always in agreement to each other and our data, were previously performed in maize like the work of Chukwu, Ekwu, Onyishi, Okporie, and Obi (2013), and Iqbal, Shinwari, and Rabbani (2015).…”

Section: Discussionmentioning

confidence: 83%

Evaluation of Elite Open-Pollinated Maize Lines in Two Contrasting Environments

Greveniotis¹,

Bouloumpasi²,

Tsakiris³

et al. 2017

JAS

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Selection environment affects plant behavior and response to selection. The objective of the present study was the evaluation of 17 quality and quantity phenotypic characteristics of six open-pollinated maize lines of fifth cycle of selection (C4), which was performed by the implementation of honeycomb breeding, in two contrasting environments (A and B) The soil chemical analysis revealed that the two environments were very diverse (A: SL, pH = 6.25, organic matter: 1.29%, B: SCL, pH = 8, organic matter: 2.4%). Our data suggest that moisture content, seed oil content, ear length, ear diameter, number of grain rows, spindle diameter and seed thickness exhibit inter-location high broad-sense heritability (over 0.9). Heritability estimations were highly depended on the environment, since GEI interaction was high indicating environmental interaction with genotype, especially environment B, which seems to favor heritability. Location affects strongly variation and genotype by environment interaction is significant in many cases. Seed width was the only characteristic to be depended on genetic variability. Descriptive statistics revealed a broad range of mean fluctuations, indicating satisfactory variability in many characteristics to be exploited by breeders. Some characteristics showed low CV (Coefficient of Variation) values (1.6 to 5.3), indicating stability of performance and low environmental effects. Significant correlations between the 17 quantity and quality traits found in our study may be a useful tool for indirect selection of certain characteristics, otherwise difficult to be selected due to non-additive effects. Cluster analysis and PCA showed contrasting results in classification of open-pollinated lines and this was attributed to strong environmental effects that distorted phenotypic expression of the characteristics studied.

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Analysis of yield and yield attributing traits of maize genotypes in Chitwan, Nepal

Cited by 19 publications

References 0 publications

Characterization of Zea Mays L. Through Morphological, Biochemical and Molecular Markers

Characterization of Zea Mays L. Through Morphological, Biochemical and Molecular Markers

Linear associations among phenological, morphological, productive, and energetic-nutritional traits in corn

Evaluation of Elite Open-Pollinated Maize Lines in Two Contrasting Environments

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