000			01415nam a2200193Ia 4500
008			220216s9999 xx 000 0 und d
100			_aMercykutty VC
245		0	_aPromising high yielding clones of Hevea brasiliensis evolved by ortet selection programme in central Kerala.
260			_bRubber Science _c2013
300			_a66-77
520			_aForty 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.
650			_aBole volume
650			_aImmaturity period
650			_aOrtet selection
650			_aPrimary clones
700			_aMeenakumari T
700			_aMydin KKavitha
942			_cJS
999			_c65932 _d65932