Kentucky bluegrass (Poa pratensis L.) (KBG) is the predominant cool-season turfgrass used on home lawns, golf courses, and athletic fields throughout temperate regions and transition zone of the USA due to its high quality appearance and desirable growth characteristics (Christians, 1998). However, as demand on limited fresh water resources continues to grow, especially throughout the arid and semi-arid west, some government agencies have begun imposing restrictions or limitations on the use of KBG due to its poor drought resistance (City of Santa Fe, NM, 2001). Drought resistance is a general term encompassing a range of mechanisms employed by plants to withstand periods of drought; drought-tolerating plants possess mechanisms to endure tissue water deficits, whereas drought-avoiding plants possess mechanisms to maintain positive tissue water balances. Kentucky bluegrass does in fact possess drought resistance, however, it is manifested in the form of drought tolerance. Under periods of prolonged drought KBG enters dormancy, appearing brown, and thus, visually unappealing. This has created demand for a comparable alternative; a turfgrass possessing the valued appearance and growth characteristics of KBG but maintaining green color and not entering dormancy quickly. ‘Reveille’ hybrid bluegrass (HBG), a cross between native Texas bluegrass (Poa arachnifera Torr.) and KBG, has recently been developed and released as a heat resistant bluegrass for the southern USA, where high summer temperatures are detrimental to