TY -JOUR
AU -Grecebio Jonathan D. Alejandro
TI -From DELTA to Genomics: Two decades of Philippine Rubiaceae research progress
PY -2026
DA -2026-05-18
JO -Taiwania
VL -71
IS -3
SP -413
EP -430
UR -https://taiwania.ntu.edu.tw/abstract/2185
AB -The coffee family (Rubiaceae) is one of the most diverse angiosperm families found in the Philippines. This review synthesizes two decades of progress in Philippine Rubiaceae systematics, phylogenetics, biogeography, and conservation biology from 2004 to the present. Currently, 94 genera are recognized across 35 tribes within two major subfamilies, Dialypetalanthoideae (51 genera) and Rubioideae (41 genera), with two genera in tribes unclassified as to subfamily. Since 2004, 54 new endemic species and two new endemic genera (<i>Kanapia</i> and <i>Chewlunia</i>) have been described, with 64.81% facing conservation threats — 23 species (42.59%) classified as Critically Endangered, nine (16.67%) as Endangered, and three (5.56%) as Vulnerable. Major systematic breakthroughs include the resolution of polyphyletic genera, including <i>Mussaenda, Antirhea, Morinda</i>, and <i>Hedyotis</i>, and 128 nomenclatural changes addressing century-old taxonomic problems. Endemism rates across the surveyed sites ranged from 46–88%, concentrated in montane ecosystems and edaphically specialized habitats, with <i>Psychotria</i> alone comprising 100 or more endemic species. Biogeographic analyses reveal the Philippines as both an evolutionary "crossroads" and "cradle," with Wallace's and Huxley's lines structuring lineage diversification, and molecular dating placing <i>Ixora</i> diversification in the Neogene (2.3–2.6 mya). Conservation genomics and bioclimatic modeling have identified montane taxa as the most vulnerable to climate-driven habitat contraction, underscoring the urgent need for climate corridors and assisted colonization. Taxonomic impediment, limited institutional capacity, and insufficient germplasm conservation infrastructure remain the principal barriers to comprehensive biodiversity documentation and the protection of this irreplaceable endemic diversity.
DO -10.6165/tai.2026.71.413