000			01329nam a2200229Ia 4500
008			220216s9999 xx 000 0 und d
100			_aMydin K K
245		0	_aVariability and distribution of tapping panel dryness in Hevea brasiliensis
260			_bProceedings of IRRDB Symposium 1999, Hainan, Peoples Republic of China. pp.83-90.
520			_aA 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.
650			_aDistribution
650			_aGenetic advance
650			_aHeritability
650			_aHevea
650			_aLarge scale trial
650			_aTapping panel dryness
700			_aJohn A
700			_aMarattukalam J G
700			_aSaraswathy P
700			_aSaraswathyamma C K
942			_cJS
999			_c72075 _d72075