Osmoregulation capacity in Bulgarian durum wheat

Figures & data

Table 1. Tolerance to osmotic stress at seedling stage of five durum wheat genotypes in a diallel cross, averaged for three years.

	Length (cm)						Coefficient of suppression (%)
	Normal water supply			Osmotic stress
Genotype	Roots	Shoots	Roots/shoots	Roots	Shoots	Roots/shoots	Roots	Shoots	Seedlings
A233	47.7	50.4	0.9	38.6	34.0	1.1	19.1	32.5	24.7^ab
Gergana	54.4	49.4	1.1	37.2	23.9	1.6	31.6	52.0	39.7^cde
Beloslava	54.0	54.7	1.0	41.0	34.8	1.2	24.1	36.4	28.0^abc
Vazhod	61.4	45.5	1.4	34.1	26.4	1.3	44.5	40.9	36.7^bcde
D-6189	69.8	58.0	1.2	38.5	34.0	1.1	44.8	41.4	42.1^de
233 × Gergana	48.9	33.3	1.5	40.3	23.9	1.7	17.6	28.2	22.7^а
233 × Beloslava	58.7	45.3	1.3	42.9	32.5	1.3	26.9	21.6	24.8^ab
233 × Vazhod	55.4	45.5	1.1	43.6	29.0	1.5	21.3	36.3	25.4^ab
233 × 6189	50.8	43.0	1.2	36.9	28.9	1.3	27.4	32.7	28.5^abcd
Gergana × Beloslava	60.6	50.9	1.2	46.8	31.0	1.5	22.8	39.2	29.9^abcd
Gergana × Vazhod	56.4	44.2	1.3	32.5	21.2	1.5	42.4	52.0	41.8^de
Gergana × 6189	48.8	45.6	1.1	30.8	23.0	1.3	38.5	49.6	47.7^e
Beloslava × Vazhod	60.5	45.3	1.3	39.3	27.9	1.4	35.0	49.9	35.2^bcd
Beloslava × 6189	48.5	32.6	1.5	29.6	19.8	1.5	38.9	39.3	39.4^cde
Vazhod × 6189	55.6	38.9	1.4	33.9	21.7	1.6	39.0	44.2	36.6^bcde

Note: a, b, c, d values differ significantly at p < 0.05.

Table 2. Significance of GCA and SCA and the ratio between GCA and SCA variances.

Suppression coefficient	General combining ability (GCA)	Specific combining ability (SCA)	GCA/SCA
roots	***	***	≤1
shoots	***	***	≤1

Note: ***p ≤ 0.1%.

Figure 1. Dendrogram of five durum wheat genotypes based on phenotypic traits (means of three years) under water stress conditions (a) and on microsatellite markers (b).

Figure 2. PCA of phenotypic traits and molecular markers in five Bulgarian durum wheat genotypes grown in a greenhouse during 2006–2009 at water-limited conditions (a) and well-watered conditions (b).