IMPLICATIONS OF POLYEMBRYONY ON THE GROWTH PERFORMANCE IN MANGO CULTIVARS

In mango, unlike monoembryonic types, variability in the polyembryonic cultivars is much less.
There is a need to create variability by producing new recombinants, which while retaining the polyembryonic nature should have other desirable characters, either for use as rootstocks or as commercial types.
Studies on polyembryony and its implication on germination, survival and growth performance of seedlings were studied in 7 open pollinated cultivars of mango.
Germination percentage was highest in ‘Bappakai’ (75.85%) closely followed by ‘Vellaikulumban’ (73.8%) and ‘Kurukkan’ (73.7%). Germination was lowest in ‘Peach’ (35%). Percent polyembryony was highest in ‘Olour’ (84.38%) followed by ‘Moreh’ (75.53%). Maximum number of seedling/stone was recorded in ‘Moreh’ and ‘Nekkare’. Days taken for completion of germination was early in ‘Peach’ and ‘Nekkare’, while ‘Bappakkai’ and ‘Vellaikulumban’ took more days to complete germination (136 days). Percentage of single seedlings produced was highest in ‘Peach’ (85.52%) followed by ‘Nekkare’ (73.28%). The occurrence of double seedlings was highest in ‘Olour’ (43.75%) and ‘Bappakai’ (40.76%). The single and double seedlings performed better with respect to growth parameters and vigor than those producing more than two seedlings/stone.
The origin of these seedlings either zygotic or nucellar is being addressed using microsatellite markers, which can be useful for breeding and clonal propagation for rootstock purpose.

Global Conference on Augmenting Production and Utilization Of Mango: Biotic and Abiotic Stresses

A. Sane, M.R. Dinesh, K.V. Ravishankar, H. Ravishankar , C. Vasugi

nucellar, zygotic seedling, multiple seedling, microsatellite markers, Mangifera indica

https://doi.org/10.17660/ActaHortic.2015.1066.4