Table 3.

Means for COOL and HOT genotypes for 2 years of experiments (2008–2009 and 2010–2011) with Seri/Babax bread wheat grown under drought and heat stress

Trait	Env.	Group mean (SE)			r
		COOL	HOT	Pr > |t|
Canopy temperature during vegetative stage (°C)	Drt	23.5 (0.37)	24.9 (0.50)	0.040**	ns
	Heat	27.0 (0.16)	28.0 (0.17)	0.000***	ns
Canopy temperature during grainfilling stage (°C)	Drt	26.1 (0.11)	26.7 (0.10)	0.001***	−0.70 ***
	Heat	31.6 (0.12)	32.4 (0.24)	0.0055***	−0.75 ***
Yield (g/m2)	Drt	204 (10.7)	172 (5.7)	0.017**	–
	Heat	240 (6.9)	215 (4.9)	0.010**	–
Biomass at maturity (g/m2)	Drt	525 (24.4)	440 (10.2)	0.007***	0.90 ***
	Heat	565 (20.2)	505 (11.6)	0.021**	0.84 ***
Heading (dae)	Drt	79 (0.58)	77 (0.77)	0.035**	−0.78 ***
	Heat	51 (0.25)	50 (0.42)	0.003***	ns
Maturity (dae)	Drt	112 (0.85)	109 (0.56)	0.018**	−0.65 ***
	Heat	83 (0.21)	82 (0.48)	0.007***	0.58 ***
Number of grains (†) (grains/m2)	Drt(‡)	8,985 (725)	5,438 (605)	0.007***	0.93 ***
	Heat	8,380 (365)	6,885 (349)	0.011**	0.70 ***
Water soluble carbohydrates (†) (%)	Drt(‡)	32.7 (0.30)	38.6 (1.1)	0.016**	ns
	Heat	9.0 (0.67)	15.4 (2.0)	0.018**	ns
Root: shoot at anthesis	Drt	0.32 (0.02)	0.28 (0.02)	0.018**	nc
	Heat	0.30 (0.04)	0.27 (0.03)	ns	nc

Data for the canopy temperature during vegetative and grainfilling stages was taken from: Pinto et al. (2010) and used for the selection of sister lines included in the current study. Statistically significant values according to Student’s t test at levels * α = 0.1, ** α = 0.05 and *** α = 0.01. All traits were recorded in the complete set of ten genotypes except by those indicated by (†) which were measured in the subset selected for root and RASM analyses. ^(‡) Data for 1 year under Drt. Phenotypic correlation (Pearson) is shown as r for all the traits with yield using raw data for two replications and 2 years in each environment

Env environment, SE Standard error of means indicated in brackets, ns not significant, nc not calculated