Table 1.

Intensity of callus meristem growth expressed as growth index (GI; see text) in barley single and double mutants with and without DMSO or HC toxin

Mutant/hybrid	Control (H2O)	DMSO	DMSO + HC	Height of intact plant (cm)
WT (‘Auksiniai II’) (−)	4·18 ± 0·57	3·18 ± 0·50	4·26 ± 0·66	75·2 ± 1·2
Hv-tw (−)	0·35 ± 0·08c3	0·70 ± 0·16c3	1·30 ± 0·24c3	71·7 ± 0·9
Hv-tw2 (common mother) (−)	3·90 ± 0·58	3·97 ± 0·54	2·82 ± 0·30a	66·4 ± 1·33
Hv-Lemma hooded (Lh) (−)	1·46 ± 0·24c3	1·91 ± 0·35a2	1·61 ± 0·30c2	50·3 ± 1·03
Hv-tw2 × Hv-Lh N13 (−)	2·00 ± 0·33c2	1·84 ± 0·32a3	1·30 ± 0·22c3	49·3 ± 0·8
Hv-tw2 × Hv-Lh N17 (+−)	2·61 ± 0·52a	2·08 ± 0·342	1·48 ± 0·19c3	57·9 ± 1·03
Hv-tw2 × Hv-Lh N11-18 (+)	2·17 ± 0·40b1	2·41 ± 0·222	2·86 ± 0·35	67·4 ± 1·33
Hv-tw2 × Hv-Lh N19 (+)	1·11 ± 0·18c3	1·65 ± 0·27b3	2·39 ± 0·48a	70·6 ± 1·33
Hv-Hooded (H) (−)	2·03 ± 0·28c2	2·17 ± 0·252	2·00 ± 0·31b	71·4 ± 1·2
Hv-tw2 × Hv-H N8-20 (−)	2·14 ± 0·25b2	1·51 ± 0·18b3	1·63 ± 0·19c3	75·2 ± 0·8
Hv-Dense wing hood (Hv-Dwh) (−)*	2·08 ± 0·42b1	2·35 ± 0·262	3·85 ± 0·391	30·4 ± 0·83
Hv-tw2 × Hv-Dwh N25 (+)	2·38 ± 0·30b1	2·55 ± 0·331	3·15 ± 0·50	80·8 ± 1·03
Hv-Hoods on center spikelet (Hv-Hcs) (−)*	1·59 ± 0·28c3	0·68 ± 0·11c3	2·82 ± 0·29a	91·8 ± 1·13
Hv-H × Hv-Hcs N9 (+)	2·10 ± 0·20c2	2·07 ± 0·252	3·57 ± 0·45	89·8 ± 1·1
Hv-Multiflorous (Hv-Mf) (−)*	2·01 ± 0·51b1	2·23 ± 0·77	1·41 ± 0·38c2	44·2 ± 0·93
Hv-tw2 × Hv-Mf N14 (+)	2·45 ± 0·25b1	2·13 ± 0·252	2·77 ± 0·79	66·6 ± 0·93

*Accession numbers in USDA-ARS National Small Grains Collection are GSHO 928, GSHO 666 and GSHO 79, respectively.

(+,−) formation of leafy/shoot-like structures: (+), present, (−), absent; (+−), present under field conditions, absent in greenhouse.

^a,b,cIn comparison with WT (wt) (‘Auksiniai II’): ^aP < 0·05; ^bP < 0·01; ^cP < 0·001.

^1,2,3In comparison with the mother plant Hv-tw₂: ¹P < 0·05; ²P < 0·01; ³P < 0·001; similarly for plant height in the comparison of the corresponding mutant with WT (wt) or of father mutant with the corresponding hybrid.