Reading: Morphological, chemical and bioactive variation in selected Soursop germplasm

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Morphological, chemical and bioactive variation in selected Soursop germplasm

Authors:

S. M. P. C. Padmini ,

Sri Lanka Council for Agricultural Research Policy, Colombo, LK
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D. K. N. G. Pushpakumara,

University of Peradeniya, LK
About D. K. N. G.
Department of Crop Science, Faculty of Agriculture
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R. Samarasekera

Industrial Technology Institute, Colombo, LK
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Abstract

Soursop (Annona muricata L.) is an underutilized tropical fruit tree in Sri Lanka. The crop has shown variability for its fruit morphology and chemical constituents. Despite the importance of A. muricata collection, characterization and improvement of its germplasm has been limited in Sri Lanka, hindering its effective conservation through utilization. This study identified the morphological, chemical and bioactive variation of the selected germplasm of A. muricata. A multistage sampling survey was conducted in homegardens in the dry, intermediate and wet zones and random representative samples were collected from existing germplasm collections at the Research Centres in Sri Lanka. Morphological variations of A. muricata was observed in a total of 315 samples collected from three climatic zones and 133 samples obtained from germplasm collections at Research Centres. Although 45 morphological characters were recorded from 448 accessions only 15 characters were subjected to Principal Component Analysis, Factor Analysis and Cluster Analysis, due to lack of variability and low coefficient of variation. A dendrogram showed nine distinguishable clusters at 1% linkage distance. Further, cluster analysis by using chemical characters (total soluble solids, pH, reducing sugars, and DPPH free radical scavenging activity) showed three distinguishable clusters at 0.5% linkage distance. Accessions 104 and 423 with different traits such as fruit weight (0.7 - 3.5 kg), seeds (5 - 8 seeds / 100 g of fruit pulp), high total soluble solids, and moderate free radical scavenging capacity, can be considered as morpho-types with superior characters for selection and improvement of A. muricata in Sri Lanka.
How to Cite: Padmini, S.M.P.C., Pushpakumara, D.K.N.G. & Samarasekera, R., (2017). Morphological, chemical and bioactive variation in selected Soursop germplasm. Sri Lanka Journal of Food and Agriculture. 3(2), pp.10–20. DOI: http://doi.org/10.4038/sljfa.v3i2.47
Published on 29 Dec 2017.
Peer Reviewed

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