Latin name of the genus and species of the plant claimed: Humulus lupulus.
Variety denomination: ‘YCR Accession No. 4’.
STATEMENT REGARDING FERERALLY SPONSORED RESEARCH OR DEVELOPMENT None.
BACKGROUND OF INVENTION This invention relates to a new and distinct variety of hop plant (Humulus lupulus), and more particularly to a new hop plant resulting from the open pollination of ‘Swiss Tettnanger’ (unpatented) as part of a controlled breeding program in 1998. Selection of the new variety and initial reproduction by root cuttings was carried out in a research nursery in Prosser, Wash., U.S.A. Subsequent asexual reproduction took place in Granger, Wash., U.S.A. The new variety has been stably reproduced over successive generations.
Both ‘YCR-4’ and its parent ‘Swiss Tettnanger’ are classified as aroma hops, selected for desirable aroma quality. However, ‘YCR-4’ is distinguished from its parent ‘Swiss Tettnanger’ by several characteristics, as set forth in Table 1.
TABLE 1
Comparison of ‘Swiss Tettnanger’ and ‘YCR-4’
Characteristics ‘Swiss Tettnanger’ ‘YCR-4’
Brewing quality
Average alpha acid level 4-6% 6-9%
(percent of cone weight)
Average beta acid level (percent 3-6% 6-8%
of cone weight)
Ratio of alpha acid to beta acid 1:1 1:1
Average cohumulone level 20-25% 26-29%
(percent of alpha acid)
Total oils (ml/100 g) 0.42-1.13 Approx. 1.5
Storage quality
Stability (percent loss of alpha 50% 20-30%
acids after 6 months storage at
room temperature)
Agronomics
Yield (lbs./acre) 1000-1300 2200-3000
Susceptibility to powdery More susceptible Less susceptible
mildew
Resistance to downy mildew Moderate Moderate
Maturity date (Yakima Valley, Early, 3rd to 4th Late, 2nd week
Washington) week of August of September
BRIEF DESCRIPTION OF THE PHOTOGRAPHS FIG. 1 shows a hop plant of the new variety;
FIG. 2 shows a cone from a hop plant of the new variety;
FIG. 3 shows a cluster of cones on a hop plant of the new variety;
FIG. 4 shows the leaves of the hop plant of the new variety; and
FIG. 5 shows the vine of the hop plant of the new variety.
DETAILED DESCRIPTION OF THE VARIETY The following is a detailed botanical description of the new hop plant, based on observations of specimens grown in Granger, Toppenish, Moxee, and Harrah, Wash. during the 2001 growing season. All colors are described according to The Royal Horticultural Society Colour Chart (Royal Horticultural Society, London). It should be understood that the botanical and analytical chemical characteristics described will vary somewhat depending upon cultural practices and climatic conditions and can vary with location and season.
- Bine:
-
- Main bine color.—146D yellow green.
- Stripe color.—183C greyed purple.
- Stipule direction.—Outward-down, forked.
- Stipule color.—144B yellow green.
- Bine diameter.—At base: 0.7 cm; 9 feet from base: 0.8 cm; 18 feet from base: 0.7 cm.
- Leaves:
-
- Arrangement.—Opposite.
- Shape.—Palmate.
- Length.—Avg. 14.5 cm (mature leaf).
- Width.—Avg. 13.0 cm (mature leaf).
- Color.—Upper surface, mature leaf: 137A green. Lower surface, mature leaf: 137C green. Upper surface, immature leaf: 137B green. Lower surface, immature leaf: 137C green.
- Number of lobes.—3-10.
- Margin.—Serrated.
- Serrations per inch.—6-7.
- Pose.—Downward.
- Petiole length.—Avg. 6.4 cm (mature).
- Petiole color at base.—Varied, 183C greyed purple and 143A green.
- Venation.—Reticulate.
- Vein color.—145A yellow green.
- Leaf resin gland color.—13C, 14C and 15D yellow.
- Cones:
-
- Length.—Avg. 3.02 cm.
- Diameter.—Avg. 1.63 cm.
- Bract tip color.—146B yellow green.
- Bract base color.—145B yellow green.
- Bracteole color.—145B yellow green.
- Cone shape.—Ovoid.
- Bract shape.—Ovate.
- Bract tip shape.—Cuspidate.
- Bract tip position.—Recurved.
- Bracteole shape.—Narrowly rounded.
- Lupulin gland color.—17A, 17B, 15A and 15B yellow.
- Quality data:
-
- Alpha acids (% of cone weight).—5.46-9.29 mean=7.44, n=10.
- Beta acids (% of cone weight).—5.78-7.79 mean=7.14, n=10.
- Cohumulone (% of alpha acids).—24.88-29.09 mean=26.95, n=8.
- Total oils.—1.5 ml/100 g cones.
- Storageability.—70.25%-78.03% alpha remaining about 6 months storage at room temperature.
- Oil analytical data.—Table 2.
TABLE 2
Essential Oil Profile of YCR4
106 mg of 10% Adsorbate/150 C/5 Min./1.0 ug Int. Std. By DTD-GC-MS
(Peak Area Integration from DTD-GC-FID Analysis)
MS GC-FID
Spec # Peak Assignment Peak Area Area %
92 isoprene 3154.714 1.493
198 2-methyl-3-buten-1-ol 1457.541 0.690
296 d-8 toluene (internal standard)
328 3-methyl-2-butenal 941.346 0.446
334 n-octane 798.296 0.378
339 acetic acid 1883.299 0.891
370 isobutyric acid (2-methylpropanoic 244.107 0.116
acid)
398 possibly pentyl alcohol 104.691 0.050
405 3-methylbutyric acid 301.569 0.143
412 2-methylbutyric acid 269.756 0.128
414 2-methyl-2-butanol acetate + 2,6- 299.401 0.142
dimethyl-2,4-heptadiene
422 butyl-2-methylpropanoate (butyl 266.414 0.126
isobutyrate)
433 alpha-pinene 126.371 0.060
448 possibly formamide 1261.861 0.597
464 beta-pinene + 2-methylbutyl 821.842 0.389
propanoate
468 methyl, 5-methylhexanoate 97.371 0.046
476 myrcene 20782.279 9.837
484 hexanoic acid 368.963 0.175
490 3-methylbutylisobutyrate 1176.898 0.557
493 2-methylbutylisobutyrate 1034.212 0.490
501 alpha-phellandrena 346.454 0.164
508 alpha-terpinene 507.470 0.240
515 cis-ocimene 354.921 0.168
523 methylheptanoate 413.171 0.196
533 heptyl acetate 283.440 0.134
542 methyl, 6-methylheptanoate 748.568 0.354
547 heptanoic acid 834.398 0.395
554 linalool + pentyl-3-methylbutyrate 2160.128 1.022
570 methyl octanoate 683.501 0.324
582 methyl, 4-methyl-2-oxopentanoate 451.766 0.214
591 2,3-dihydro-3,5-dihydroxy-6-methyl- 684.438 0.324
4(H)-pyran-4-one
604 2-nonanol 339.230 0.161
617 d-8 naphthalene (internal standard)
623 methyl nonanoate (branched isomer) 2986.862 1.414
627 methyl-4-octenoic acid 870.192 0.412
635 2-decanol 944.855 0.447
643 methyl-6-nonenoate 931.681 0.441
655 methyl nonanoate 1465.176 0.693
661 nerol 444.129 0.210
675 2-methylheptyl propionate 881.313 0.417
681 unknown 230.901 0.109
686 geraniol + 2-undecanone (branched 1253.790 0.593
isomer)
696 2-undecanol (branched isomer) 338.728 0.160
705 undecadienol isomer 326.548 0.155
712 undecenol isomer 721.289 0.341
717 methyl decanoate (branched isomer) 1098.103 0.520
722 2-undecanone 848.863 0.402
733 2-undecanol 1262.099 0.597
740 methyl-4-decenoate 12898.897 6.105
742 methyl-4,8-decadienoate 579.773 0.274
755 methyl geranate + methyl decanoate 2548.231 1.206
766 unknown 204.564 0.097
777 octyl-2-methylpropanoate 756.305 0.358
784 alpha-cubebene 420.880 0.199
791 2-tridecanone (branched isomer) 566.371 0.268
799 2-tridecanone (branched isomer) 258.748 0.122
806 methyl-2-undecenoate 1041.976 0.493
808 alpha-ylangene 503.279 0.238
813 alpha-copaene 1203.824 0.570
826 methyl undecanoate 899.178 0.426
833 2-tridecanone 507.088 0.240
843 ? sesquiterpene 206 m.w. 163 base peak 131.612 0.062
854 methyl ester of unsaturated fatty acid 136.607 0.065
867 caryophyllene 36181.296 17.125
874 beta-cubebene 2076.303 0.983
880 linalylisobutyrate 304.175 0.144
891 3-methylbutyloctanoate 143.006 0.068
906 humulene 43184.507 20.440
913 germacrene D 407.641 0.193
928 gamma-cadinene 4751.493 2.249
940 beta-selinene 4255.554 2.014
950 alpha-selinene 6501.117 3.077
955 alpha-amorphene 531.661 0.252
964 methyl, 3,6-dodecadienoate 544.689 0.258
972 gamma-muuroline 344.080 0.163
984 delta-cadinene 5902.935 2.794
993 sesquiterpene w/ no common name 617.786 0.292
CAS#16728-99-7, cadinene-type
999 alpha-muurolene 696.655 0.330
1005 alpha-calacorene 123.304 0.058
1025 2-tetradecanone 460.135 0.218
1030 tetradecadienol isomer 576.686 0.273
1037 tetradecenol isomer 993.396 0.470
1051 caryophyllene oxide 1378.781 0.653
1070 methyl tridecenoate 901.896 0.427
1076 linalyl-3-methylbutyrate 556.047 0.263
1082 humulene oxide 1253.453 0.593
1090 unk. sesquiterpenol w/ 179 peak 478.628 0.227
1105 cadinol 511.249 0.242
1110 unk. sesquiterpenol w/ 179 peak 563.546 0.267
1121 delta-cadinol 1236.734 0.585
1127 beta-cadinol 418.047 0.198
1136 globulol 1354.295 0.641
1144 pentadecadienol 3621.791 1.714
1155 pentadecenol 1431.673 0.678
1166 unknown sequiterpenol 496.377 0.235
1188 2-pentadecanone 446.201 0.211
1216 possibly a linalool or geraniol ester 465.789 0.220
1228 pentadecadienyl acetate 388.543 0.184
1239 pentadecenyl acetate 843.677 0.399
1252 possibly famesol 1016.391 0.481
1271 myristic acid 994.397 0.471
1361 possibly famesyl acetate 488.532 0.231
1371 2,4-heptadecadione 158.692 0.075
1378 hexadecadienol 588.667 0.279
1416 unknown 176.575 0.084
1470 3,7,11,15-tetramethylhexadecapentaene 1016.312 0.481
isomer (272 m.w.)
1491 palmitic acid 1433.655 0.679
Total 211276.645 100.000
- Aroma profile: Mild, with citrus, spicy, floral, and piney notes.
- Use: Used primarily in brewing for its aromatic properties.
- Disease resistance:
-
- Powdery mildew.—Moderate to high resistance.
- Downy mildew.—Unknown; no infection observed to date.
- Verticillium wilt.—Unknown.
- Pickability: Good.
- Harvest maturity: Late; after September 10.
- Yield: 2200-3000 lb/ac (2466-3363 kg/ha) estimate.
