Wildtype

Member lines: P898012, P954035

Gross epicuticular wax phenotype: Wildtype

Epicuticular wax morphology:

(see Jenks et al., 1992 and scanning electron micrograph to the right of this table)

tissue	cork-silica cell associated wax	cuticle wax
leaf sheath (abaxial surface)	long filaments	plates
leaf blade (abaxial surface)	short filaments	thin plates

Linkage group: not applicable

Genotype: BmBmHH

Epicuticular wax load:

(data from Agronomy Farm trial 1992)

line	abaxial leaf sheath	leaf blade
P898012	2.24 +/- 0.31	1.29 +/- 0.13
P954035	3.39 +/- 0.41	1.06 +/- 0.13

Leaf sheath epicuticular wax chemistry:

Leaf sheath epicuticular wax free fatty acids

FFA homologue	% total FFAs	load (mg/cm2)
C16	0.30	0.06
C18	0.20	0.04
C20	0.03	0.01
C22	0.13	0.03
C24	0.25	0.06
C26	0.34	0.08
C28	74.6	19.7
C30	24.0	6.15
C32	0.16	0.04
total	100	26.18

Wild type sheath wax is composed mainly (90%) of C28 and C30 free fatty acids. Other wax lipids are shown in the TLC at right. Unlabelled spots are unidentified lipids.

Agronomic characters:

line	yield without drought (kg/ha)	yield in drought (kg/ha)
P898012	6102
P954035	6204	1382

P898012 (right) is a Federita type and has less visible wax than P954035 on its culm.

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