TY  - BOOK
AU  - Mercykutty VC
AU  - Meenakumari T
AU  - Mydin KKavitha
TI  - Promising high yielding clones of Hevea brasiliensis evolved by ortet selection programme in central Kerala
PY  - 2013///
PB  - Rubber Science
KW  - Bole volume
KW  - Immaturity period
KW  - Ortet selection
KW  - Primary clones
N2  - Forty two ortets selected from a large estate in Central Kerala were evaluated during the first five years under tapping in a smallscale trial. The parameters evaluated include yield, girth and timber attributes. Eight Promising primary clones were selected from the estate. Three top ranking clones viz. Cy O 48, Cy O 41 and Cy O 35 recorded a mean yield of 67.7, 64.3 and 60.4g t-1 t-1, respectively and they were significantly superior in yield to that of RRII 105 with above average bole volume. Among these, Cy O 48 was the most promising selection in terms of yield, vigour and bole volume. Three ortets noted for high yield and high girth increment rate on tapping were Cy O 31, Cy O 43 and Cy O 48. The superiority of ortets with respect to yield and secondary characters is discussed in detail, giving emphasis to the eight final selection based on rubber yield
ER  -