Does a tree’s ability to reproduce vegetatively vary with genotype?
Keywords:
Tectona grandis, clonal propagation, Epicormic shoots, Rooting, Growth hormones, Genetic influenceAbstract
Teak (Tectona grandis L.f.) is the well-known tropical timber species to meet the demand of wood-basedindustries. Choosing superior parents and developing technologies for its vegetative propagation is essentialfor promising better growth and yield. Production of epicormic shoots on live detached branches under highhumidity and temperature, is an excellent propagation option widely practiced in trees. The present studywas designed to investigate the effect of genotype on the development of epicormic shoots from branchcuttings and its rooting behavior. Epicormic shoot and root production was observed to vary significantlyamong the genotypes studied. Initiation of bud burst started from the 5th day and continued till the 9th day ofplanting. The number of epicormic shoots produced too significantly varied among the genotypes. Themaximum number of epicormic shoots was observed in genotypes Aravallikkavu,Topslip-6, Nellikutha-2,and Nellikutha-7, whereas Nedumkayam-1 produced one or no shoots. The average shoot diameter fromdifferent genotypes varied from 2.85 cm to 5.43 cm. Significant variation among the genotypes in rootingwas observed. The highest rooting percentage of epicormic shoots was recorded in the Nellikutha-3 genotype(57.11 %) followed by Tholpatti 01 (47.89 %) and Mananthavadi 02 (39.11 %). The present study confirmsthe genotypic influence on vegetative propagation by varied shoot and root production potential.References
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