Correlation of Traits Afffecting Grain Yield in Winter Maize (Zea mays L.) Genotypes

Poudel, Mukti Ram; Paudel, H.K.; Yadav, Bisheswar Prasad

doi:10.3126/ijasbt.v3i3.13137

Cited by 3 publications

(2 citation statements)

References 3 publications

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“…Grain yield exhibited the highest positive genetic correlation with days to anthesis, days to silking, cob length, numbers of kernel rows, and numbers of grains per row, which is following the results of Vasic et al (2001). Similar kinds of findings were also reported by Poudel, Paudel, and Yadav (2015). Therefore, selection for late flowering, taller plant height, longer cob length, more numbers of kernel rows and numbers of grains per row may produce higher grain yield in the populations studied.…”

Section: Yield and Yield Component Traitssupporting

confidence: 83%

Evaluation of pro-vitamin A enriched maize hybrids for fighting hidden hunger in Nepal

Tripathi

Gautam²,

Koirala³

et al. 2022

J. Agric. Appl. Biol.

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Prevailing vitamin A deficiency is a malnutrition repercussing retarded growth, weak immune system and night-blindness in human beings. Pro-vitamin A enriched maize hybrids could be a strategy for combating vitamin A deficiency, mostly prevailing in children and women of Nepal. With the objective to investigate superior pro-vitamin A enriched ‘bio-fortified’ maize cultivars, twice replicated experiments were laid out in α-lattice design over two consecutive growing seasons of 2019 and 2019/20 at the National Maize Research Program (NMRP), Rampur, Chitwan, Nepal. The results revealed that the difference among tested hybrids was glaring for all agro-morphological, yield, and yield components traits. Among the evaluated traits, days to 50% anthesis and silking, plant and ear height, numbers of kernel rows per cob, grains per row, and grain yield varied significantly among the tested maize hybrids. Effect of planting season was significant for grain yield where winter maize produced 32% higher grain yield than spring maize. HPO16-2, HPO49-3, HPO49-5, and HPO49-2 were the 38-61% high yielding ‘bio-fortified’ maize genotypes than normal hybrid check. Therefore, these hybrids might be the potential higher-yielding future pro-vitamin A enriched maize hybrids to resolve food insecurity, malnutrition, trade deficit on maize grains and specially to combat vitamin A deficiency in Nepal.

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Section: Yield and Yield Component Traitssupporting

confidence: 83%

Evaluation of pro-vitamin A enriched maize hybrids for fighting hidden hunger in Nepal

Tripathi

Gautam²,

Koirala³

et al. 2022

J. Agric. Appl. Biol.

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show abstract

“…Overall, short growth duration gives low yields compared to medium and long growth duration. These results contradicts with those of Poudel et al (2015) whose findings illustrated positive and significant correlation with days to silking and tasseling in maize suggesting that with more days to tasseling and silking there would be more vegetative growth and less time for reproductive growth which consequently resulting in less yield. Borrás et al (2007), Ghimire and Timsina (2015a) and Kanagarasu et al (2012) findings concurred in totality with the current study.…”

Section: Correlation Of Yield and Herbicide Tolerance With Other Agro...contrasting

confidence: 79%

Evaluation of genetic variability and interrelationships among M3 and M4 maize inbred lines in Kenya

Mallu¹,

Wesonga²,

Githiri³

et al. 2021

Adv. J. Plant Biol.

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The present study was conducted at Jomo Kenyatta University of Agriculture and Technology, Juja to assess the agronomic performance of mutant maize lines of 39 filial generation 3 (M3) and filial generation 4 (M4) maize lines and a check variety among agro-morphological traits with their association with grain yield. Data on various agro-morphological characters were recorded using morphological descriptors for maize and analyzed using Genstat Release 14.1. Data was also subjected to XLSTAT 2014 and DARwin 6.0.12 software for principal and cluster analyses. Results obtained differed significantly in herbicide tolerance days for both M3 and M4 (p≤0.01). However, plant height, maturity days, flag leaf length and width, grains ear-1, ear length, ear diameter and grain yield plant-1 differed significantly in M3 and M4 lines (p≤0.05). Grain yield plant-1 showed a strong significant positive correlation with anthesis days, plant height, grains ear-1 and ear diameter and length but negatively correlated with days to pollen shedding, tasseling, maturity and tolerance in M3 while flag leaf width, harvestable and total ears plant-1 showed positive and significant correlation but negatively correlated with tolerance days in M4. Principal component analysis showed variations among mutated maize lines in M3 and M4 with first seven principal components (PC) indicating that the first six PCs explained 78.69% and first six PCs contributing 71.28% respectively of the total variation. Cluster analysis showed three clusters and seven sub-clusters indicating differences in morphological diversity among the M3 inbred lines and two clusters with cluster one of hybrid 513 and three sub-clusters in cluster two of hybrid 520. Plant height, flowering days and ear length were crucial phenological traits determining grain yield among herbicide tolerant lines showing significant variability that could be considered in hybridization and development of herbicide tolerant hybrid genotypes in future maize breeding programmes.

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Mid-Season Leaf Glutamine Predicts End-Season Maize Grain Yield and Nitrogen Content in Response to Nitrogen Fertilization under Field Conditions

et al. 2017

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Abstract:After uptake in cereal crops, nitrogen (N) is rapidly assimilated into glutamine (Gln) and other amino acids for transport to sinks. Therefore Gln has potential as an improved indicator of soil N availability compared to plant N demand. Gln has primarily been assayed to understand basic plant physiology, rather than to measure plant/soil-N under field conditions. It was hypothesized that leaf Gln at early-to-mid season could report the N application rate and predict end-season grain yield in field-grown maize. A three-year maize field experiment was conducted with N application rates ranging from 30 to 218 kg ha −1 . Relative leaf Gln was assayed from leaf disk tissue using a whole-cell biosensor for Gln (GlnLux) at the V3-V14 growth stages. SPAD (Soil Plant Analysis Development) and NDVI (Normalized Difference Vegetation Index) measurements were also performed. When sampled at V6 or later, GlnLux glutamine output consistently correlated with the N application rate, end-season yield, and grain N content. Yield correlation outperformed GreenSeeker TM NDVI, and was equivalent to SPAD chlorophyll, indicating the potential for yield prediction. Additionally, depleting soil N via overplanting increased GlnLux resolution to the earlier V5 stage. The results of the study are discussed in the context of luxury N consumption, leaf N remobilization, senescence, and grain fill. The potential and challenges of leaf Gln and GlnLux for the study of crop N physiology, and future N management are also discussed.

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Correlation of Traits Afffecting Grain Yield in Winter Maize (Zea mays L.) Genotypes

Cited by 3 publications

References 3 publications

Evaluation of pro-vitamin A enriched maize hybrids for fighting hidden hunger in Nepal

Evaluation of pro-vitamin A enriched maize hybrids for fighting hidden hunger in Nepal

Evaluation of genetic variability and interrelationships among M3 and M4 maize inbred lines in Kenya

Mid-Season Leaf Glutamine Predicts End-Season Maize Grain Yield and Nitrogen Content in Response to Nitrogen Fertilization under Field Conditions

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