56. Volume 12- Number 2 - IP Australia

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PLANT VARIETIES JOURNAL 1999 VOL 12 NO. 2 Measurements: taken from up to 20 stalks sampled randomly per plot Prior Applications and Sales First sold in Australia in May 1997. Description: Dr Mike Cox, Bureau of Sugar Experiment Stations, Bundaberg, QLD Table 26 Saccharum varieties ‘Q173’ *‘Q120’ *‘Q170’ A GROWTH HABIT erect erect semi-erect to medium TILLERING few medium many LEAF CANOPY heavy light heavy to very heavy SUCKERING very few very few few to few CULM HEIGHT (m) LSD (P ≤ 0.01) = 0.29 mean 2.34a 2.46a 3.02b std deviation 0.26 0.25 0.28 (very short (short to (tall) to short) medium) ALIGNMENT OF INTERNODES – zigzaggedness weak to weak aligned medium to weak INTERNODE LENGTH – bud side (cm) LSD (P ≤ 0.01) = 2.36 mean 18.6a 18.7a 21.4b std deviation 1.97 2.27 2.07 (short to (short to (long to medium) medium) very long) INTERNODE LENGTH – side opposite bud (cm) LSD (P ≤ 0.01) = 2.33 mean 18.1a 18.4a 21.3b std deviation 1.98 2.23 2.09 (short to (short to (long to medium) medium) very long) INTERNODE WIDTH – central, perpendicular to bud (mm) LSD (P ≤ 0.01) = 1.79 mean 25.4a 23.2b 21.6b std deviation 2.4 2.7 2.4 (thick to (medium) (very thin to very thick) thin) INTERNODE WIDTH – central, dissecting Bud (mm) LSD (P ≤ 0.01) = 1.91 mean 25.1a 22.8b 22.3b std deviation 2.5 2.7 2.6 (thick to (thin to (thin) very thick) medium) INTERNODE SHAPE bobbin bobbin bobbin shaped shaped shaped to conoidal INTERNODE CROSS-SECTION round oval weakly oval INTERNODE DEWAXED COLOUR (RHS) – exposed yellow-green yellow-green yellow-green (144A–144B) (152A) (144A–144B) (152A–144A) INTERNODE DEWAXED COLOUR (RHS) – unexposed yellow-green yellow (10B) yellow-green (154C) to (151A–153D) yellow-green (152D) INTERNODE WAX COVERING medium to medium light to heavy medium WAX BAND DISTINCTIVENESS indistinct to indistinct to distinct medium medium WAX BAND WIDTH wide wide to medium very wide GROWTH CRACKS few absent few to medium CORK CRACKS absent very few few BUD GROOVE PRESENCE inconspicuous absent to medium BUD GROOVE LENGTH medium – – to long BUD GROOVE DEPTH very shallow – – to shallow absent ROOT BAND WIDTH – bud side very wide wide medium (10mm– (approx (7.5mm 11.5 mm) 9 mm) –9.5 mm) BUD – prominence weak medium weak BUD – shape ovate round to ovate ovate BUD – position of base (above leaf scar) near near high BUD – position of tip (relative to growth ring) level slightly above below BUD WIDTH (excluding wings) wide to very wide wide very wide BUD WING WIDTH medium wide narrow to medium LEAF SCAR PROMINENCE prominent prominent prominent LEAF SCAR SLOPE oblique oblique oblique GROWTH RING weakly flush flush depressed LAMINA LENGTH (TVD Leaf) (m) LSD (P ≤ 0.01) = 0.11 mean 1.71a 1.71a 1.65a std deviation 0.10 0.09 0.13 (long to (long to (medium very long) very long) to long) 54
DESCRIPTIONS PLANT VARIETIES JOURNAL 1999 VOL 12 NO. 2 LAMINA WIDTH (longitudinal midpoint) (mm) LSD (P ≤ 0.01) = 5.3 mean 50.0a 37.5b 39.2b std deviation 5.8 3.4 4.6 (very wide) (narrow) (narrow to medium) MIDRIB WIDTH (longitudinal midpoint) (mm) LSD (P ≤ 0.01) = 0.5 mean 4.4a 3.8b 3.4b std deviation 0.5 0.4 0.5 wide to narrow to very narrow very wide medium LAMINA WIDTH/MIDRIB WIDTH RATIO medium low high to high LAMINA ATTITUDE curve near tip curve near middle curve near middle LEAF SHEATH – adherence to culm weak to medium to weak medium strong LENGTH OF TVD LEAF SHEATH (cm) LSD (P ≤ 0.01) = 2.5 mean 39.5a 34.7b 32.5b std deviation 2.2 2.2 3.5 (very long) (medium (Short to to long) medium) HAIR GROUP 57 – occurrence absent absent absent LIGULE SHAPE LIGULE HEIGHT deltoid crescentiform deltoid medium medium wide HAIR GROUP 61 – density dense medium sparse AURICLE – prominence (second fully unfurled leaf) medium to medium medium prominent AURICLE SHAPE – ULP lanceolate lanceolate transitional AURICLE SHAPE – OLP deltoid transitional deltoid AURICLE SIZE – ULP medium small – AURICLE SIZE – OLP medium – small FLOWERING medium to sparse to medium to profuse medium profuse FLOWERING open open open panicle and panicle and panicle and discontinuous discontinuousdiscontinuous Means followed by the same letter are not significantly different at P ≤ 0.01, Duncan’s Multiple Range. ‘Q175’ Application No: 98/107 Accepted: 30 Jun 1998. Applicant: Bureau of Sugar Experiment Stations, Indooroopilly, QLD. Characteristics (Table 27, Figure 37) Ploidy: ‘Q175’ is a cytologically complex polyploid and aneuploid interspecific sugarcane (Saccharum spp.). Plant: ‘Q175’ is a perennial grass with erect growth habit, many tillers per stool. Leaf canopy is medium. Suckers are medium in number. Stem: Culms are very short to short with mean length to top visible dewlap (TVD) approximately 2.36m (2.02m–2.69 m). Alternate internodes of a culm are arranged in a weakly to medium zigzagged pattern. Length of longest internode on bud side is short with mean length approximately 17.9cm (14.5cm–21.8cm) and side opposite bud is short with mean length approximately 17.6cm (13.8cm–21.8cm). Diameter of longest internode central and perpendicular to bud is very thin with mean approximately 19.9 mm (17.2mm–22.5mm). Diameter of longest internode central and dissecting bud is very thin with mean approximately 20.9mm (18.3mm–23.7 mm). Internodes are weakly concave-convex shaped and oval in cross-section. Colour of dewaxed internode is yellow-green (RHS 146D) to yellow-green (RHS 144A) exposed and green-yellow (RHS 1C) unexposed. Wax covering of internode is light, with wax band distinct and very narrow. Growth cracks are absent. Cork cracks are absent. Bud groove is absent. Root band width on bud side is narrow (5.5mm–7 mm). Bud is of weak prominence, ovate in shape, and with base near to medium to leaf scar and tip level to above the growth ring. Bud width excluding wings is medium to wide and bud wing is very narrow in width. Leaf scar is prominent and oblique descending towards bud. Growth ring is flush. Leaf: Lamina of TVD leaf is short in length with mean approximately 1.55 m (range 1.38 to 1.70 m), very wide with mean width approximately 41.9 mm (range 31.5 to 49.6 mm) at longitudinal midpoint, and curved near tip in attitude. Midrib of lamina at longitudinal midpoint is medium to wide with mean 4.2 mm (range 2.9 to 5.4 mm). Lamina width to midrib width ratio is low to medium with mean approximately 10.1 (range 8.4 to 12.1). Leaf sheath of TVD leaf is medium in length with mean length approximately 33.0 cm (range 29.0 to 37.5 cm). Sheath of senescent leaves have weak to medium adherence to culm. Hairs on abaxial leaf sheath surface (Group 57) are absent. Ligule is crescentiform in shape and wide at midrib section. Cilia along the free margin of the ligule (Group 61) are medium density and very short. Auricles are inconspicuous to medium in prominence and asymmetrical. Inner or underlapping auricle is transitional in shape. Outer or overlapping auricle is transitional in shape. Flowering: The flower is an open panicle and flowering is discontinuous and sparse to medium. Seed: The seed or fruit is a caryopsis. Disease resistance: ‘Q175’ is very highly to highly resistant to Leaf Scald (Xanthomonas albilineans (Ashby) Dowson), resistant to Red Rot (Glomerella tucumanensis (Spego) Arx and Mueller, highly resistant to Pachymetra Root Rot, and very highly susceptible to sugarcane mosaic virus. Other characteristics: Fibre quantity and quality are acceptable for milling purposes (impact reading 0.37, shear strength 21.4, short fibre 60.2%). ‘Q175’ has good resistance to sugarcane weevil borer (Rhabdoscelus obscurus) and good 55
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Plant Varieties Journal Quarter Two
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PLANT VARIETIES JOURNAL 1999 VOL 12
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PBR AMENDMENTS PLANT VARIETIES JOUR
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Page 101 and 102: SERVICE DIRECTORY WARATAH SEED CO.
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56. Volume 12- Number 2 - IP Australia

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