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The world demand for woody biomass for energy generation is increasing rapidly (Rakos 2008; Spelter and Toth 2009; Sikkema et al. 2011). Woody biomass from short-rotation crops can contribute to secure renewable and sustainable energy around the world owing to their potential to produce high biomass in short time periods, especially in tropical countries with plentiful rain (Hendrati 2016). Many fast-growing species have high wood quality for energy and an ability to re-sprout for multiple harvests, which is important for economic success. Multipurpose species provide multiple environmental and rural development benefits (Singh et al. 2010) and with genetic improvement, further improvement in yield and efficiency of production are anticipated. Studies on genetic improvement of Calliandra calothyrsus for wood energy indicated high heritability value of wood volume (h = 0.5) and an increased yield of 75% for wood volume (Hendrati 2016). This paper describes research on the genetic improvement for wood energy of Leucaena leucocephala, which is self-fertile and therefore less variable than Calliandra calothyrsus, which is not selffertile. Nevertheless, as 2 subspecies of Leucaena leucocephala (ssp. glabrata and leucocephala) are present in Indonesia, there is some ability for outcrossing, so genetic gain is achievable.

Genetic improvement of <i>Leucaena leucocephala</i> for wood energy