TY  - BOOK
AU  - Mydin K K
AU  - John A
AU  - Marattukalam J G
AU  - Saraswathy P
AU  - Saraswathyamma C K
TI  - Variability and distribution of tapping panel dryness in Hevea brasiliensis
PB  - Proceedings of IRRDB Symposium 1999, Hainan, Peoples Republic of China. pp.83-90.
KW  - Distribution
KW  - Genetic advance
KW  - Heritability
KW  - Hevea
KW  - Large scale trial
KW  - Tapping panel dryness
N2  - A large scale evaluation trial of 21 clones of Hevea brasiliensis was studied with respect to yield, girth and the incidence of tapping panel dryness (TPD) over nine years of exploitation. Tapping panel dryness was confirmed to be a distinct clonal characteristic with high heritability and low genetic advance. A significant positive correlation of TPD with girth and girth increment over nine years of tapping was observed. The distribution of TPD affected trees in the field was non random in most of the clones studied. Nonadditive gene action in the inheritance of TPD as indicated by the genetic parameters and its implication on Hevea breeding are discussed
ER  -