Abstract

Though teak plantation programme in Kerala commenced in 1841, attempts to genetically improve the planting stock were initiated in 1961 only when a few plus trees were selected. As no further work continued since then, this project was initiated withthe objectives of selection of seed stands and plus trees and establishment of pilot seed orchards. Plantations superior in vigour and growth compared to adjoining areas were selected and converted to seed production areas after removal of inferior trees. Fifty trees, outstanding in growth and stem form designated as plus trees have been selected in different teak growing areas in Kerala using check tree method. Bud grafts of the plus trees were prepared using scion from upper one third part of the treecrown and stock prepared from 1-to 2 year-old teak stumps collected from Forest Department nurseries. Grafts raised in polypots during February-April were outplanted in the orchard site by the onset of monsoon in June. For planting, 8 m quincuncial espacement was adopted, using a poly cross design. Altogether three pilot seed orchards were established at three representative locations. They were Nilambur in the Northern, Palappilly in the Central and Arippa in the Southern Forest Circles of Kerala. Fifteen, twenty and twentyfive clones are represented in these orchards respectively. Having begun the basic work in the genetic improvement programme, future scheme of work is also suggested