Evaluation of provenances for seedling attributes in teak (Tectona grandis LINN.F.)
1999
Jayasankar, S. | Babu, L.C. | Sudhakara, K. | Kumar, P.D.
A provenance trial in teak (Tectona grandis LINN.F.) involving seven provenances from Kerala (India) was conducted during the period from June 1995 to January 1997. Data were compiled on germination characteristics and seedling performance in the nursery,and also on root growth potential and field establishment using stumps. Germination characteristics did not vary significantly among the provenances in the nursery. Analysis of variance demonstrated profound variation in seedling growth rates among the provenances. Parambikulam, Nilambur and Malayattur provenances consistently recorded better shoot and root growth, biomass allocation and relative growth rate, while the local provenance (Trichur) was poorest. Application of MAHALANOBIS' D-2 statistics revealed that a close similarity exists in among the fastest growing provenances. Root growth potential of the provenances was highly variable in most of the attributes like number of lateral and tertiary roots, length of three longest lateral roots and dry weight of lateral roots. Nilambur and Malayattur provenances were superior in this respect, while the local provenance (Trichur) produced the lowest means. Performance of the provenances in the field followed nursery growth patterns, confirming that growth is under strong genetic control. Grading of seedlings based on their height and collar diameter at an early age is recommended for selection of best preforming seedlings in the main field. Parambikulam, Nilambur and Malayattur are the best provenances suited for planting in Trichur District of Kerala, India.
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