Performance of polyembryonic mango rootstocks under nursery conditions.
Venkat Rao, Reddy Y. T. N.
Author Affiliation: Division of Fruit Crops, Indian Institute of Horticultural Research, Bangalore 560 089, India.
Indian Journal of Horticulture 62 : 298-299
Abstract : Fourteen polyembryonic mango genotypes (Starch, Kitchner, Prior, Chandrakaran, Nekkare, EC-95862, Olour, Muvandan, Bappakai, Peach, Kensington, Mylepelian, Kurukkan and Vellaikolumban) and one monoembryonic control (Alphonso) were evaluated during 2001/02 in Bangalore, Karnataka, India. Observations were recorded for seedling height, number of leaves, leaf area, vigour index I (percent germination × length of seedling), vigour index II (percent germination × total dry weight of seedling) and extent of polyembryony. The highest values for seedling height, number of leaves, leaf area and vigour index were observed in the monoembryonic cultivar Alphonso. In the case of polyembryonic genotypes, seedling height and number of leaves were highest in Mylepelian and lowest in Starch. Vigour index I was highest in Alphonso and lowest in Kitchner, whereas vigour index II was highest in Muvandan and lowest in Kitchner. More than 100% polyembryony was observed in all polyembryonic genotypes due to the presence of more than one embryo per stone. Correlation analysis showed that: number of leaves correlated positively with plant height; leaf area correlated positively with plant height and number of leaves; vigour index I correlated positively with plant height, number of leaves and leaf area; and vigour index II correlated positively with plant height and vigour index I.