Genetic variability of Custard Apple (Annona squamosa L.) Genotypes under Southern Rajasthan

Author: Saddam Husain, L.N. Mahawer, Manisha Verma, Iqbal Ahmed, H.L. Bairwa and Arjun Lal Regar

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Abstract

In the present investigation, an attempt has been made to generate information on genetic variability using thirty custard apple genotypes. The variability, heritability and genetic advance as percent of mean were performed for 22 selected characters among selected custard apple genotypes. The thirty genotypes were collected from the Udaipur, Rajsamand and Chittorgarh districts of Rajasthan. The higher phenotypic coefficient of variation was observed over genotypic coefficient of variation for all traits, indicating the dominance of environmental factors over these traits. Maximum GCV and PCV were recorded for pulp: seed ratio (37.95 and 38.62), number of flakes without seeds (29.32 and 29.98), non-reducing sugar (27.65 and 28.50), shelf life (25.84 and 27.16), acidity (22.58 and 24.19) and number of seeds fruit (21.71 and 22.85). The heritability estimation was varied from 45.97 to 96.76 % for traits under study. High heritability observed for fruit weight, pulp: seed ratio, number of flakes without seeds and non-reducing sugar. Genetic advance as percentage of mean was also found high for pulp: seed ratio, number of flakes without seeds, non-reducing sugar and shelf life. Hence, these traits imply the potential for crop improvement through clonal selection and wide hybridization.

Keywords

Custard apple, GCV, PCV, Heritability and Genetic Advance

Conclusion

Based on the present investigation, the higher extent of heritability (in broad sense) coupled with high genetic advance was recorded for most of the characters revealing additive genetic effect. It was observed that PCV was higher than GCV for all the selected characters studied. Highest GCV and PCV is recorded for pulp: seed ratio (37.95 and 38.62), number of flakes without seeds (29.32 and 29.98), non-reducing sugar (27.65 and 28.50), shelf life (25.84 and 27.16), acidity (22.58 and 24.19) and number of seeds fruit (21.71 and 22.85) respectively. On the basis of information obtained from the present study, it indicates that there is an existence of greater amount of genetic variability for all the characters in different genotypes, which can be efficiently utilized for improvement of custard apple genotypes by choosing effective breeding program based on genetic makeup of different traits.

References

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How to cite this article

Saddam Husain, L.N. Mahawer, Manisha Verma, Iqbal Ahmed, H.L. Bairwa and Arjun Lal Regar (2023). Genetic variability of Custard Apple (Annona squamosa L.) Genotypes under Southern Rajasthan. Biological Forum – An International Journal, 15(9): 367-369.