Genetic variability, heritability and genetic advance of maize (Zea mays L.) inbred lines for yield and yield related traits in southwestern Ethiopia

Jilo, Tadesse; Tulu, Leta; Birhan, Techale; Beksisa, Lemi

doi:10.5897/jpbcs2018.0742

Cited by 24 publications

(36 citation statements)

References 13 publications

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“…the pure lines with these traits can be used for crop improvement). Similar results were presented for maize Journal of Agriculture and Natural Resources (2020) 3(2): 127-139 ISSN: 2661-6270 (Print), ISSN: 2661-6289 (Online) DOI: https://doi.org/10.3126/janr.v3i2.32491 132 inbred lines in Ethiopia for tassel branching, grain yield and 1000 grain weight (Taye, 2014) and days to 50% silking (Tadesse et al, 2018). Number of leaves, ear length, and ASI have also shown similar results in maize during summer season in Dang, Nepal (Bartaula et al, 2019).…”

Section: Genetic Advance and Genetic Advance As Percent Of Meansupporting

confidence: 68%

Varietal evaluation of promising maize genotypes in mid hills of Nepal

Neupane¹,

Wagle

2020

J. Agric. Nat. Res.

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The varietal evaluation of hybrid maize (Zea mays L.) genotypes with desired performance is one of the main objectives of maize breeding program. Fourteen hybrid maize genotypes were evaluated for 17 quantitative and nine qualitative traits in randomized complete block design with three replications at Sundarbazar, Lamjung, Nepal during May to September, 2019. The major objective was to identify superior genotypes based on genotypic and phenotypic variability, heritability, genetic advance, and correlation between grain yield and yield associated traits. We observed significant differences for 17 quantitative traits among the tested genotypes. Large variation was observed for grain yield among genotypes. Genotype RL-24-0/ RL-111 had the lowest yield (5.53 mt/ha) and Pioneer had the highest yield (11.98 mt/ha) whereas check variety Rampur Hybrid-10 yielded of 8.23 mt/ha. Grain yield showed highly significant positive correlations with stem girth (r= 0.67) and number of ears (r=0.6), but significant negative correlation with anthesis-silking interval (r= -0.55). The dendrogram grouped 14 genotypes into four clusters. Cluster I incorporated the highest number (five) of genotypes, which also had highest cluster mean (average yield of ~10 mt/ha) for grain yield. Traits namely test weight, ear aspect, anthesis-silking interval, number of ears, and tassel branching had high genotypic and phenotypic coefficient of variations, and heritability along with high genetic advances, indicating that these traits can be considered for maize breeding program.

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Section: Genetic Advance and Genetic Advance As Percent Of Meansupporting

confidence: 68%

Varietal evaluation of promising maize genotypes in mid hills of Nepal

Neupane¹,

Wagle

2020

J. Agric. Nat. Res.

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“…High heritability values for these traits also imply that traits can be easily passed on to the next generation enhancing selection efficiency in maize breeding programs. Jilo et al (2018) also recorded high heritability estimates for grain yield and plant height. Bartaula et al (2019) recorded high estimates for plant height at harvest (0.99) and ear height (0.99).…”

Section: Discussionmentioning

confidence: 93%

“…Genetic parameters such as genetic variability and heritability estimates are crucial in improving selection efficiency and in determining breeding progress. Several authors have reported existence of genetic variability and high heritability estimates among tested maize genotypes (Meena et al, 2016;Jilo et al, 2018;Bartaula et al, 2019). Heritability is a measure of phenotypic variance attributable to genetic causes with predictive function in plant breeding (Meena et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Genetic Evaluation and Correlation Analysis Among Various Quantitative Traits in Maize Single-Cross Hybrids Under Diverse Environments

Makore¹,

Magorokosho²,

Dari³

et al. 2021

JAS

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Genetic variation abundance, high genetic advance coupled with high heritability estimates presents the most suitable condition for selection. Ninety-five hybrids generated from elite and new inbred lines crossed using half diallel mating design were evaluated under diverse environments. The objectives were to estimate genetic variances, heritability of traits and genetic advance and to determine correlations of grain yield and its component characters in maize hybrids. Analysis of variance revealed significant differences among genotypes for all traits studied except for ear rots. Estimates of phenotypic coefficient of variation were slightly higher than genotypic coefficient of variation for all traits suggesting low influence of environment in the expression of these traits. High heritability and genetic estimates were recorded for grain yield (79%; 30.27%), plant height (85%; 102.42%) and ear height (86%; 117.15%) whilst high heritability and low genetic advance were observed for anthesis date (87%; 5.8%), texture (75%; 8%) and ear position (71%; 0.23%). Correlation between environments using grain yield data revealed existence of a very strong positive correlation between CIMMYT2 and RARS2 suggesting that the sites have the same discriminating effect. Correlation among traits revealed that grain yield had significant (P < 0.05) positive correlation with plant height and ear height. Similarly, plant height had significant and positive correlation with ear height while ear position was positively correlated to ear height. Path analysis showed that plant height, ears per plant and ear position had positive direct effects on grain, while anthesis date, ear height, ear position, grain moisture content at harvest and texture indirectly influenced grain yield. These characters’ contribution to grain yield is important and the strong association with grain yield implied that these can be used as secondary traits to indirectly select for grain yield performance in this set of germplasm across all the environments.

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“…The plants were measured individually and the mean value was recorded for the plot. All quantitative traits including plant height, ear height, leaf length and width, leaf area, ear length, ear diameter, number of kernel rows per ear and number of kernels per row were recorded on plant basis as described in Tadesse et al (2018). Similarly days to 50% anthesis and silking, anthesis and silking interval, tassel size, plant aspect, days to maturity, thousand kernels weight and grain yield were recorded on plot.…”

Section: Data Recorded On Plant Basismentioning

confidence: 99%

Association and path coefficient analysis among grain yield and related traits in Ethiopian maize (Zea mays L.) inbred lines

Jilo¹,

Tulu²

2019

Afr. J. Plant Sci.

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Twenty four inbred lines developed by the Ethiopian National Maize Breeding Program were evaluated at Jimma Agricultural Research Center during the main season of the year 2016 in an 8 X 3 Alpha Lattice (0, 1) design with three replications. The objective was to determine the phenotypic and genotypic association among traits in Ethiopian maize inbred lines and to compare the direct and indirect effects of traits on grain yield. Analysis of variance showed statistically significant (p<0.01) differences among the tested maize inbred lines for most of the traits indicating the existence of sufficient genetic variability which can be exploited in future breeding programs. Grain yield per hectare, thousand kernels weight, ear height, ear diameter, anthesis-silking interval, and plant aspect had higher phenotypic and genotypic coefficients of variation. Grain yield showed positive and highly significant (p<0.01) genotypic association with ear diameter, number of kernels per row, days to 50% silking, number of kernel rows per ear, 1000-kernels weight and leaf width. Grain yield also had positive and highly significant (p<0.01) phenotypic correlation with number of kernels per row and ear diameter. Path coefficient analysis revealed that number of kernels per row, number of kernel rows per ear, plant height, days to maturity, 1000-kernels weight, leaf width and plant aspect had a positive direct genotypic effect on grain yield. Number of kernels per row, number of kernel rows per ear, plant height and 1000-kernels weight exerted high direct effects and also indicated positive and strong association with grain yield indicating that they can be used for indirect selection of inbred lines having higher yield potential per se.

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Genetic variability, heritability and genetic advance of maize (Zea mays L.) inbred lines for yield and yield related traits in southwestern Ethiopia

Cited by 24 publications

References 13 publications

Varietal evaluation of promising maize genotypes in mid hills of Nepal

Varietal evaluation of promising maize genotypes in mid hills of Nepal

Genetic Evaluation and Correlation Analysis Among Various Quantitative Traits in Maize Single-Cross Hybrids Under Diverse Environments

Association and path coefficient analysis among grain yield and related traits in Ethiopian maize (Zea mays L.) inbred lines

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