Evaluation of Maize Genotypes (Zea mays L.) for Variability, Heritability and Genetic Advance

Sravanti, K.; Devi, Indira; Sudarshan, M.; Supriya, K.

doi:10.20546/ijcmas.2017.610.263

Cited by 14 publications

(25 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Heritability percentage in broad sense were low for Epos%, E100p, ED and GY traits,medium for DTS, PHT, EHT and KR −1 traits and moderately for EL trait. Similar results were obtained by Sesay et al [30] , Sravanti et al [33], Bartaula et al [8] and Aly et al [4].…”

Section: Discussionsupporting

confidence: 90%

Combining abilities and genetic parameters for grain yield and some agronomic traits in maize (Zea mays L.)

Habiba

El-Diasty

Aly

2022

Beni-Suef Univ J Basic Appl Sci

View full text Add to dashboard Cite

Background The improvement of maize hybrids relies on significant genetic variability among the inbred lines used and the degree to which it is transferred to progeny. Understanding the genetic parameters and heritability of traits in every population is an essential precondition for selection program. This study was designed to estimate the magnitude of genetic parameters and heritability of traits in line × tester mating design. Fifteen yellow maize inbred lines derived from different sources were crossed with two lines as tester i.e., Gm-1001 and Gm-1002 in 2019 summer season. During 2020 season, the resulted 30 crosses along with check hybrid SC-168 were evaluated in a yield trial at two locations: Gemmeiza and Sids Agric. Res. Station. Results The mean squares among two locations were highly significant for all studied traits except KR−1. The L1 and L3 had the best general combiners for GY ard fed−1. In addition, the T1 as a tester was a GCA effects good combiner for earliness, shorter plants and lower ear placement traits. While T2 was good combiner for grain yield and some of attributes. Crosses L5 × T1 and L7 × T2 had positive and significant SCA effects for grain yield. The GCA variances were higher than SCA variances for all studied traits except for ED trait, indicating that additive genetic variance played the major role than non-additive genetic variance in the inheritance of these traits. Generally, phenotypic coefficient of variability was higher than genotypic coefficient of variability for all studied traits, suggesting that there was an influence by environments in the expression of these traits. Recorded heritability percentage in broad sense ranged from low for (ear position%, no. of ears/100 plants, ear diameter and grain yield) traits, medium for (days to 50% silking, plant height, ear height and no. of kernels/row) traits to moderate high for ear length trait. Conclusion Our investigation concluded that most of the studied lines exhibited highly general combiners and the superior crosses were as a result of a good × good combiner for most of yield components traits.

show abstract

Section: Discussionsupporting

confidence: 90%

Combining abilities and genetic parameters for grain yield and some agronomic traits in maize (Zea mays L.)

Habiba

El-Diasty

Aly

2022

Beni-Suef Univ J Basic Appl Sci

View full text Add to dashboard Cite

show abstract

“…Low GCV and PCV were noted for days to 50 per cent tasseling (3.86% and 6.03%), days to 50 per cent silking (3.80% and 5.65%) and cob girth (4.99% and 7.83%) suggesting need of creation of variability either by mutation or hybridization followed by selection. Begum et al(2016) and Sravanti et al(2017) also reported similar findings. Besides, plant height, ear height, cob length and harvest index exerted high differences among GCV and PCV and hence these traits provide practically, less chances of selection, due to the higher influence of environmental factors.…”

Section: Resultssupporting

confidence: 67%

“…Plant height, ear height and hundred grain weight showed moderate heritability associated with moderate genetic gain, indicating the scope of improvement of these traits by direct selection would be limited but delayed selection might be effective for these traits. These findings were similar to the results ofJilo et al(2018) andSravanti et al(2017). Moderate values of heritability estimate along with low GAM was observed for days to 50 per cent tasseling and silking and cob girth Sravanti et al(2017),.…”

supporting

confidence: 89%

See 1 more Smart Citation

Genetic variability of quantitative characters over diverse environments in maize inbred lines

2021

EJPB

View full text Add to dashboard Cite

Twenty maize inbred lines procured from Maize Research Station, Bhiloda were evaluated during Kharif, 2019 over three diverse environments. Variability studies results from pooled environment revealed that PCV was higher in magnitude than GCV for all the characters studied. Grain yield per plant manifested a higher magnitude of GCV and PCV (34.07 and 47.76 %). Heritability estimates ranged from 21.18 per cent for harvest index to 99.04 per cent for protein content. Grain yield and biological yield per plant manifested moderate heritability estimates united with a high genetic gain of 50.06 and 45.03 per cent, respectively. At both genotypic and phenotypic levels, grain yield per plant showed a strong and positive association with plant height, ear height, cob length, cob girth, hundred grain weight, biological yield per plant and harvest index. Genotypic path studies showed the biological yield per plant had the highest and direct positive effect on grain yield per plant followed by harvest index, ear height, cob length and cob girth.

show abstract

“…The estimates of genetic parameters as variances, coefficients of variation, heritability, genotypic, phenotypic and environmental correlations, allow knowing the magnitude of the genetic variability of a population, and the selection gains. A critical analysis of genetic variability present in the germplasm of a crop and its estimation is a pre-requisite for initiating any crop improvement programme as well as adopting appropriate selection techniques (Sravanti et al, 2017). The knowledge of heritability enables the plant breeder to decide the course of selection procedure to be followed under a given situation (Li and Yang, 1985).…”

Section: Introductionmentioning

confidence: 99%

Variability, heritability and genetic advance of maize (Zea mays L.) genotypes

Bartaula

Panthi

Timilsena

et al. 2019

Res. Agric. Livest. Fish.

View full text Add to dashboard Cite

The selection efficiency for certain traits in crops can be broadened using estimates of genetic parameters, which are fundamental for plant breeding. Ten maize genotypes were evaluated in randomized complete block design (RCBD) with three replications at the field of Lamahi Municipality, Dang district of Nepal to assess the magnitude of genetic variability, heritability and genetic advance for growth, yield and yield contributing traits during summer season (June to August), 2018. Analysis of variance revealed significant differences for all traits. The phenotypic coefficient of variation (PCV) was higher than genotypic coefficient of variation (GCV) recorded for all traits. The grain yield showed the highest PCV (50.78%) and GCV (51.24%) whereas the lowest PCV (4.51%) and GCV (4.50%) were recorded for test weight; test weight showed high heritability (0.99) with low genetic advance as a percent of mean (9.26). Grain yield showed positive and significant phenotypic correlation with test weight (r=0.960), kernel per row (r=0.924), kernel rows per cob (r=0.900) and cob length (r=0.840), respectively. Traits namely grain yield, number of kernels per cob and kernel rows per cob showed high GCV, PCV. Therefore these traits can be used further in crop improvement program. Res. Agric., Livest. Fish.6(2): 163-169, August 2019

show abstract

Evaluation of Maize Genotypes (Zea mays L.) for Variability, Heritability and Genetic Advance

Cited by 14 publications

References 3 publications

Combining abilities and genetic parameters for grain yield and some agronomic traits in maize (Zea mays L.)

Combining abilities and genetic parameters for grain yield and some agronomic traits in maize (Zea mays L.)

Genetic variability of quantitative characters over diverse environments in maize inbred lines

Variability, heritability and genetic advance of maize (Zea mays L.) genotypes

Contact Info

Product

Resources

About