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Heritability and Genetic Advance Estimates from the Parental Lines of Hybrid Maize (zea Mays L.)

T Biswas
Department of Genetics and Plant Breeding, PSTU, Patuakhali - 8602, Bangladesh

MS Islam
Department of Agriculture, Faculty of Science, NSTU, Noakhali - 3814, Bangladesh

NJ Methela
Department of Agriculture, Faculty of Science, NSTU, Noakhali - 3814, Bangladesh

Abstract/ Executive Summary:

Twenty-two genotypes of maize parental line were grown during 2017-2018 at the Research field of Plant Breeding Division, Regional Agricultural Research Station (RARS), Bangladesh Agricultural Research Institute (BARI), Rahmatpur, Barisal, Bangladesh. The experiment was laid out in randomized complete block design with three replications. Heritability, coefficients of variability and genetic advance values were computed for days to tasseling, days to silking, days to maturity, plant height (cm), ear height (cm), cob length (cm) and diameter (cm), number of seed rows per cob, number of seeds per row, number of seeds per cob, thousand-grain weight (g) and yield (g/plant). Among all the traits higher phenotypic coefficient of variation (44.53) and genotypic coefficient of variation (44.18) were observed for yield/plant. The uppermost heritability was observed in the case of yield per plant (98.41) followed by 1000 seed weight (96.91). The genetic advance was highest for seeds/cob (197.87) followed by 1000-kernel weight (176.86). The greater magnitude of heritability coupled with the higher genetic advances in characters under study provided evidence that these plant parameters were under the control of additive genetic effects. Indicating that selection should lead to a fast genetic improvement of the material.

Keywords: Genetic advance, Genotypic variance, Heritability, Phenotypic variance

Location: Plant Breeding Division, Regional Agricultural Research Station (RARS), Bangladesh Agricultural Research Institute (BARI), Rahmatpur, Barisal, Bangladesh

Start Date: 00-00-2017

End Date: 00-00-2018

Program Area: Variety and Species

Commodity: Maize

Objectives:

To measure the genetic diversity among some parental lines used in hybrid maize breeding programs.

Methodology:

The field experiment was conducted at the Research field of Plant Breeding Division, Regional Agricultural Research Station (RARS), Bangladesh Agricultural Research Institute (BARI), Rahmatpur, Barisal, Bangladesh during the period from 2017 –2018. The experimental materials were consist of 22 diverse inbred lines of maize which were collected from plant breeding division, BARI, Rahmatpur, Barisal. The inbred lines were NS1 to NS22. The experiment was conducted following RCBD design with three replications. The soil of the experimental land belongs to the Non-calcareous Grey Floodplain soils under the Ganges Tidal Alluvium tract. The unit plot size was 4×4m² maintaining a spacing of 60×40 cm². Standard cultural practices were done accurately. Data were recorded for all studied characters on yield contributing traits viz. Days to tasseling, days to silking, days to maturity, plant height (cm), ear height (cm), cob length (cm) and diameter (cm), number of seed rows per cob, number of seeds per row, number of seeds per cob, thousand-grain weight (g) and yield (g/plant).

Source of Information: Environ. Sci. & Natural Resources, 12(1&2): 33-36, 2019

Article Link (Online Journal): DOI: https://doi.org/10.3329/jesnr.v12i1-2.51982

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Above all the circumstances it can be concluded that among all the traits higher phenotypic coefficient of variation and genotypic coefficient of variation were observed for yield/plant. Maximum heritability was also estimated in yield per plant followed by 1000 seed weight. The genetic advance was highest for seeds/cob followed by 1000-kernel weight. These diversities could be used for a future breeding programs to develop a recognized high-yielding maize variety in our country. Furthermore, to develop a high-yielding variety of maize selection should be done on the basis of desired characters such as yield, no. of seeds/cob and 1000 seeds weight.

Knowledge Management: Journal