The genetic vulnerability of single variety plantations of Leucaena.

Abstract

Since L. leucocephala is self pollinating and highly homogeneous and has spread from a very narrow gene base (Hawaiian type), the possibility exists of genetic problems arising in the future. However, L. leucocephala is a polyploid (2n = 104), having 8 sets of 13 chromosomes, is susceptible to very few pests and diseases, and the "Giant" varieties are of diverse origin, suggesting that genetic problems will not arise soon. It is suggested that growing more than one variety on large plantations and the development of multiline varieties will help avoid any genetic disasters.