GENETIC VARIATION OF GROWTH AND DISEASE RESISTANCE TRAITS IN OPEN-POLLINATED PROVENANCE-PROGENY TRIALS OF FALCATARIA MOLUCCANA GROWING ON TWO RUST-AFFECTED SITES AT AGE-18 MONTHS
ABSTRACT: Two Falcataria
moluccana (sengon) progeny trials, incorporating 100 different families from 12
provenances growing on two highly gall rust (Uromycladium falcatarium) prone
sites were used to estimate genetic parameters and potentially identify
rust-resistant material. The analysis was performed to assess provenance- and
family-level survival, rust incidence, and growth at the two progeny trials.
Height, diameter, survival, and rust incidence was measured at two progeny
trials at 18 months-of-age located at Jember and Lumajang, East Java. Rust
incidence at the two trial sites was severe, with only 39% overall survival
(35% and 43% at Jember and Lumajang, respectively). The analysis revealed
significant genetic variation at the provenance level for survival, rust
incidence, and growth. No statistically meaningful narrow-sense heritability of
these traits was indicated, though this is probably reflective of the inadequate
within-family replication and effects associated with uneven stocking resulting
from rust-induced mortality. The significant genotype-by-environment
(provenance-by-site) interaction was also indicated, though the performance of
some of the best- and worst-performing provenances was relatively stable,
allowing recommendations of suitable provenances for further testing on
rust-prone sites.
KEYWORDS: Falcataria
moluccana; progeny trial; multilocation; growth; genetic parameter
Author: Liliana Baskorowati,
David Bush, Dedi Setiadi, Mudji Susanto
Journal Code: jpkehutanangg170002
