000			01308nam a2200169Ia 4500
008			220216s9999 xx 000 0 und d
100			_aTan H
245		0	_aGenetic studies of leaf disease resistance in Hevea
260			_bJournal of Natural Rubber Research _c1996
300			_a108-114
520			_aThis paper highlights the major findings on the genetic studies of Hevea leaf disease (Colletotrichum, Corynespora and Oidium) resistance using 18 selected genotypes and progenies from a five-parent diallel cross population. Results of the investigations showed that Colletotrichum and Corynespora resistance had moderate heritability estimates while Oidium resistance had relatively lower values. General combining ability (GCA) effects were important in controlling all the three disease resistance traits. Specific combining ability (SCA) effects were demonstrated to be important in accounting for the variation of Corynespora and Oidium resistance. Reciprocal effects were not detected for these diseases; and the relative magnitude of GCA to SCA was 37 (range: 25.6-40.0) for Colletotrichum; 4.6 (range: 1.4-11.1) for Corynespora and 2.0 (range: 0.5-4.8) for Oidium resistance.
650			_aDisease resistance
650			_aHevea
650			_aLeaf disease
700			_aTan A M
942			_cJS
999			_c59860 _d59860