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CULTIVARS

Registration of KX2-Hawaii, Interspecific-Hybrid Leucaena

Dep. of Tropical Plant and Soil Science, College of Tropical Agriculture and Human Resources, Univ. of Hawaii, 3190 Maile Way, Honolulu, HI 96822. Institutional Sponsor: University of Hawaii

^* Corresponding author (brewbake{at}hawaii.edu).

ABSTRACT

KX2-Hawaii (Reg. No. CV-281, PI 647963) (Leucaena hybrid) is a tropical, multipurpose, woody forage legume developed at the College of Tropical Agriculture and Human Resources (CTAHR) of the University of Hawaii. It was derived from hybrids made in 1976 between Leucaena leucocephala (Lam.) de Wit and L. pallida Britton & Rose, followed by six cycles of recurrent mass selection. Each cycle involved 2- to 4-yr growth of 2000 plants pollarded quarterly. All trees were eliminated except self-sterile segregants with high forage-regrowth vigor and with high tolerance of the psyllid (Heteropsylla cubana Crawford). Approximately 120 remaining trees were chosen as parents for the next cycle of selection. KX2-Hawaii was released by CTAHR in 2007.

Abbreviations: CTAHR, College of Tropical Agriculture and Human Resources, University of Hawaii