Genetic variation in the time of transition from juvenile to mature wood in loblolly pine ( Pinus taeda L. ) . Silvae Genet . 34 ( 1 ) : 14–19 . Matziris , D.I. 1989. Variation in growth and branching characters in black pine ( Pinus ...

Pinus caribaea shows a high degree of genetic variation , producing many vigorous trees alongside weak , abnormal or ... be derived from the best trees , using the latest scientific techniques to reproduce desirable characteristics .