TY  - BOOK
AU  - John Alice
AU  - Idicula P Sabu
AU  - Nazeer M A
AU  - Thomas Vinod
AU  - Varghese Y Annamma
TI  - Potential new primary clones of Hevea evolved by ortet selection in India
PY  - 2013///
PB  - Journal of Rubber Research
KW  - Disease incidence
KW  - Hevea brasiliensis
KW  - Ortet selection
KW  - Rubber yield
N2  - An ortet selection programme for selection of elite mother trees of rubber (Hevea brasiliensis Muell.Arg) from among the seedlings of the Gough Garden (GG) series viz., GGI, GG4 and GG6 of the Prang Besar Isolation (PBIG) gardens in Malaysia was undertaken in a large estate in Central Kerala, South India.The resultant 47 preliminary selections of ortet clones were cloned and evaluated during the forst five yearsof tapping in small scale trials in the same location. The parameters for evaluation were yield and yield components, growth attributes, timber yield, bark anatomical parameters and incidence of leaf diseases. Significant variation was observed for the traits studied. Based on the data on yield, growth and timber characteristics, 11 promising new primary clones were selected. Six clones, viz., KO 27, KO 25, KO 6, KO 9, KO 7, and KO 16 were identified as high rubber yielders. Four clones viz., KO 7, KO 13, KO 22, and KO 31 exhibited a high timber yield potential. Out of the eleven selections, four clones viz., KO 27, KO 7, KO 9, KO 11 were promising in terms of rubber and timber yield. The superiority of the ortet clones with respect to yield and secondary characters are discussed
ER  -