We had the chance to ask this relevant question to two top breeders, and here are the answers.

Dra. Susana Milla – Lewis, University of North Carolina.

All grasses have their strong points and their Achilles heel, there is no perfect grass, each one will be optimal depending on the characteristics of the terrain and climate.
In C3, fescue, has the greatest resistance to heat and drought. But specially C4 are the perfect option. 

We have to keep in mind, that the number of days per year above 90º f, is increasing and the forecast is that at the end of the century there will be more droughts. Therefore, working on C4 is working on the seeds of the future, those that will best fit the new climate that the greenhouse effect brings us.

Micah Woods, Ph.D. founder and scientific director at the Asian Turfgrass Center.

Use C4 grasses if possible. Use soil surfactants—doing so can result in better turf quality with lower irrigation amounts. Use soil moisture meters to find out which areas require water, and to find out how much water will be required. Grow the grass as slow as possible. Only irrigate essential areas.

The most innovative C4 varieties in our portafolio are: 

SEED VARIETIES 
Bermudagrass IBIZA 
Paspalum vaginatum PURE DYNASTY 
Dactyloctenium Australe LM 
Kikuyu KENYA 
American grass GRA PRO 
Axonopus fissifolius BRASIL PRO 

VEGETATIVE VARIETIES 
Bermudagrass TAHOMA 31 
Bermudagrass EVERGREEN 
Kikuyu KENDA PRO 
Zoysia STADIUM 
American grass STENO PRO