A Study on Variability in Seed Morphology in Shrunken-2 Parental Lines and Hybrids of Sweet Corn

Author: Narender Pal, Lalit Kumar, Nitika Kalia and Monalisha Sahoo

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Abstract

A study was conducted to see the variability in sweet corn seeds size and shape and its correlation with field emergence. Grain size and shape properties were used for morphological variability assessment in the parental lines and hybrids of sweet corn. Seed’s geometric features such as area, bounding box length and breadth, perimeter, axial length and width, median length and width, equivalent diameter, eccentricity and roundness were computed on the binary image with help of ‘Grain Size and Shape Analysis’ software. The results showed a considerable variability among genotypes for seed morphological characters. The study conducted a correlation heat-map analysis using various seed morphological characters and emergence percentage of seeds. The results revealed strong positive correlations among the seed morphological characters. The highest positive correlation was observed between the seed area and seed equivalent diameter (r = 0.99), as well as between the seed bounding box length and seed eccentricity (r = 0.99). The emergence percentage of sweet corn genotypes also exhibited correlations with the seed morphological characters. Among all the seed morphological characters, seed bounding box breadth showed the highest positive correlation (r = 0.57) with seedling emergence. The seed morphological parameters, found correlated with field emergence can be analysed and utilised to assess the performance behaviour of the sweet corn seeds.

Keywords

Zea mays L. var saccharata, seed morphology, emergence percentage, ‘Grain Size & Shape Analysis’, correlation heat-map

Conclusion

The present study was conducted to see the variability in sweet corn seeds size and shape and its correlation with field emergence. Seed’s morphological characters such as area, bounding box length and breadth, perimeter, axial length and width, median length and width, equivalent diameter, eccentricity and roundness were having a considerable variability among genotypes. The Pearson correlation heat-map analysis done using various seed morphological characters and emergence percentage of seeds revealed a strong correlation among the seed morphological characters. The emergence percentage of sweet corn genotypes also exhibited correlations with the seed morphological characters. Thus, the seed morphological parameters, found correlated with field emergence can be analysed and utilised to assess the performance behaviour of the sweet corn seeds.

References

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How to cite this article

Narender Pal, Lalit Kumar, Nitika Kalia and Monalisha Sahoo (2023). A Study on Variability in Seed Morphology in Shrunken-2 Parental Lines and Hybrids of Sweet Corn. Biological Forum – An International Journal, 15(7): 45-50.