Genetic improvement of forest trees in Arunachal Pradesh.
An account of progress in tree improvement work in Arunachal Pradesh, which started in 1978. The first step, selection of plus trees of 27 species (including plus clumps of bamboos), was done by January 1980 (although selection continued thereafter); criteria adopted are noted. Grafting/budding trials were conducted for 18 species, and used to create germplasm banks and seed orchards. The best technique (which is described) was found to be patch budding. For Terminalia myriocarpa specifically, a seed production area was selected in 1979. By 1986, germplasm banks and seed orchards had been established for 12 species (Acrocarpus fraxinifolius, Ailanthus integrifolia, Altingia excelsa, Canarium strictum, Chukrasia velutina, Duabanga grandiflora, Gmelina arborea, Michelia champaca, Morus laevigata, Phoebe goalparensis, Tectona grandis and Terminalia myriocarpa). Germplasm banks only were established for a further 2 species (Anthocephalus chinensis and Bombax ceiba [B. malabaricum]). The bamboo species for which improvement work was done were: Bambusa balcooa, B. tulda, B. pallida, B. nutans, Bambusa spp. (nal and nangal), Dendrocalamus giganteus and D. hamiltonii.