Genetic divergence studies in drumstick (Moringa oleifera Lam.)
Keywords:
Drumstick, genetic divergence, quantitative characters, principle component analysisAbstract
Twenty-five drumstick accessions were evaluated for morphological, qualitative and quantitative characters. Considerable variation was observed among the accessions. Two peaks of flowering viz., January-March and September-November, were observed in accessions VKMo 2, VKMo 7, VKMo 12, VKMo 15, VKMo 16 and VKMo 17. Three accessions viz., VKMo 32, VKMo 35 and VKMo 38 were categorized as leafy types. Tree shape varied from upright to spreading. Accession VKMo 3 recorded greatest tree height (7.68 m) and trunk girth (65.8 cm). Accession VKMo 10 recorded highest fruit length (89.50 cm), fruit girth (6.72 cm) and number of ridges/fruit (10.50). Highest fruit weight was recorded in VKMo 9 (160.00 g). Accession VKMo 6 recorded highest number of seeds per fruit (21.20). Highest number of fruits/tree was recorded in VKMo 2 (22.21) and total fruit yield/tree in VKMo 3 (1775.54 g/tree). Principal component analysis for the quantitative characters revealed that first three principal components accounted for 88.1 per cent of the total variation which was contributed by number of seeds per fruit, fruit girth, trunk girth and tree height. Clustering of the accessions resulted in formation of five clusters in which VKMo 3 collected from Vellanikkara recorded highest mean values for almost all quantitative characters.References
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