Blueberry plant denominated ‘Katahdin’

Abstract

Katandin is a new blueberry variety of Vaccinium corymbosum from the Michigan State University breeding program. Is comprised of primarily Vaccinium corymbosum, with about 7% of its genes coming from V. darrowii, 4% from V. angustifolium and <1% from V. tenellum and V. ashei. It is a highly productive cultivar with excellent fresh fruit quality. It is well adapted to all northern highbush production areas. Canes are numerous, moderately branched and the fruit are well exposed. Its berries are large, have small, dry picking scars, medium blue color, good firmness and flavor. Katandin is characterized by high yields, high vigor and strong winter hardiness.

Claims

1. A new and distinct highbush blueberry plant, substantially as described and illustrated herein.

Description

BRIEF DESCRIPTION OF PHOTOGRAPHS

(1) The present invention will become more fully understood from the detailed description and the accompanying drawings, wherein:

(2) FIG. 1 is a photographic print in full color of a 4-year-old Katandin blueberry plant with green fruit in a planted row in the foreground.

(3) FIG. 2 is a photographic print in full color of a 4-year-old Katandin blueberry plant with blue fruit in a planted row in the foreground.

(4) FIG. 3 is a photographic print in full color of a 4-year-old Katandin plant with flowers.

(5) FIG. 4 is a photographic print in full color of fruit clusters of a 4-year-old Katandin blueberry plant. Most, but not all, of the fruit shown is mature.

DESCRIPTION OF THE NEW VARIETY

(6) The following is a detailed botanical description of the new and distinct variety of blueberry, its flowers, fruit and foliage, based on observations of specimens grown at Benton Harbor Mich. and Grand Junction, Mich. over four years, and at South Haven, Mich., Lacota, Mich., Corvallis, Oreg., and Lowell, Oreg., over a two year period. The taxonomic characteristics chosen in the detailed description are standard in the practice (R E Gough, R J Hindle, and V G Shutak, Identification of Ten Highbush Blueberry Cultivars using Morphological Characteristics, HortScience 11 (5): 5124, 1976). Color descriptions, except those given in common terms, are presented in Royal Horticultural Society Colour Chart designations. In cases where the color descriptions cited from The Royal Horticultural Society Colour Chart differ from the colors shown in the drawings, the colors cited from The Royal Horticultural Society Colour Chart should be considered accurate. Any deviation from these colors in the drawings is due to failure of the photographic process to exactly duplicate the colors of nature. In addition, fruit color designations in Table I are applicable only to mature fruit.

(7) TABLE-US-00001 TABLE 1 Katahdin characteristics Plant traits Mature height 1.40 m Mature width 1.05 m Height/width ratio 1.33 Growth habit upright Annual renewal canes 2-4 Internode length on 1.56 cm average (range 1.4-1.7) spring shoots Mature cane color Grayed green, 197 A Mature cane length 1.07 m (range 80-140) Mature cane width 3.7 cm (range 26-41) Bark texture Rough and flakey New shoot color primarily green Foliage Leaf shape obtuse Apex shape acute Base shape rounded Leaf length 5 cm average (range 4.4-5.0 cm) Leaf width 2.4 cm average (range 2.1-2.8 cm) Leaf length/width ratio 2.1 Leaf margin entire Leaf nectaries absent Pubescence none Color upper surface green (137A) Color lower surface green (138B) Petiole length 1.7 cm average (range 1-2 cm) Petiole color light yellowish green (142C) Bud Bud shape ovate Bud width 3.8 mm average (3.0-4.0 mm range) Bud length 55.2 mm average (5.0-6.0 mm range) Color reddish brown Blossoms Shape of corolla Round-urceolate Calyx 5 lobed Style length 8-9 mm Color of open flower White with pink blushes Flower # per cluster 8 average (range 5-10) Pistil one per flower Pistil color yellowish green (145A) Pistil length 8-9 mm Flower diameter 8-9 mm Flower length 10-11 mm Fragrance faint blueberry aroma Calyx diameter 5 mm Sepals fused, 5 lobes Length 1-2 mm Width 1 mm Color top yellowish green (146C) Color bottom yellowish green (146C) Reproductive organs Type berry Seed size 1.32 mm Number of seeds 12.7 average (ranges 5-32) Mature fruit Height 1.1 cm average (range 1.0-1.2 cm) Width 1.6 cm average (range 1.5-1.7 cm) Shape oblate Color with bloom violet blue (98D) Color without bloom violet blue (103A) Pedicel scar size range 1.5-2.0 mm (1.8 mm average) Pedicel length 7-8 mm Pedicel color yellowish green (144B) Peduncle length 11-13 mm Peduncle color yellowish green (138A) Average weight 2.44 g

PERFORMANCE AND QUALITY DATA

(8) In multi-location trials, Katandin has proven to be an extremely upright very vigorous bush that ripens fruit in the early mid-season (Table 2). Its fruit have had good to excellent size, color, firmness and flavor. It has also annually produced good to excellent yields.

(9) In comparative Michigan trials, Katandin has ripened a few days later than Draper and Bluecrop and before Legacy and Osomo (Table 3). Katandin has a much better plant habit than Bluecrop, is more winter hardy and has a much smaller fruit scar. It is a little darker than Bluecrop but otherwise its fruit quality is slightly better or comparable to Bluecrop. Katandin is much more upright and vigorous that Draper, with comparable fruit quality.

(10) The fruit weight of Katandin was among the largest of the varieties sampled in Grand Junction in 2016 and 2017 (Table 4). It had among the firmest berries in 2016 and had similar firmness to all other varieties except Duke in 2017. Its soluble solids were among the highest in both years, while its acidity was on the high but acceptable range in 2017, comparable to Draper.

(11) Katandin is intended for all northern highbush production areas including Michigan, the eastern US and Canada, central Chile, Europe, SE Asia, China and the Pacific Northwest.

(12) TABLE-US-00002 TABLE 2 Development and fruit characteristics of Katahdin evaluated at one location in Michigan, two in Oregon and one in Denmark. Fruit characteristics Location Year Habit Season Vigor Yield Michigan Grand Junction 2014 9 4 7 8 2015 9 2 8 7 2016 9 4 8 7 Oregon Lowell 2014 9 4 8 2015 9 3 8 2016 9 3 5 Grubbenvorst 2014 7 4 5 2015 9 3 8 2016 9 3 8 Netherlands 2014 10 5 8 2015 7 4 8 Grand Mean 8.8 3.5 7.7 7.4 Fruit characteristics Firm- Location Size Color Scar ness Flavor Michigan Grand Junction 7 7 7 7 6 8 6 8 7 7 7 9 7 8 6 Oregon Lowell 9 7 9 8 6 6 6 7 6 7 9 4 7 8 6 Grubbenvorst 7+ 5 7+ 6 7 7 6 9 5+ 7 7 6 9 6 7 Netherlands 6 6 6 6 6 8 7 8 Grand Mean 7.2 7.0 7.5 7.5 6.6 Two year old plants were set at 4 10 spacing in 2012. Evaluations were made when the bushes were 30-50% ripe. For bush habit, 1 = sprawling, 5 = bushy and 9 = upright. For season, 1 = very early, 4-5 = mid-season and 9 = very late. The rating scale for vigor and fruit characteristics was 1-9, with 1-4 = inferior, 5-6 = acceptable, 7 = good, 8 = excellent and 9 = superior.

(13) TABLE-US-00003 TABLE 2 Mean fruit ratings and ranges (parenthesis) of Katahdin and 5 other cultivars at Grand Junction, Michigan in 2014, 2015 and 2016. Date First Plant Winter Plant Fruit Cultivar harvest habit hardiness vigor Weight Duke 6/30 5 6.5 6 6 (6/29-7/1) (4-6) (6-7) (all 6s) (4-8) Bluecrop 7/4 4.7 6.5 6.9 6.5 (7/2-7/6) (4-5) (6-7) (6-7) (6-7) Draper 7/4 4.7 8 5.5 7.6 (6/27-7/7) (4-5) (7-9) (5-6) (7-9) Katandin 7/10 9 8.5 7 7 (7/9/-7/11) (all 9s) (8-9) (all 7s) (6-8) Legacy 7/14 6.7 6 9 6 (7/14- (5-7) (5-7) (all 9s) (all 6s) 7/15) Fruit Picking Cultivar Color scar Firmness Flavor Yield Duke 6 7 8.5 6 5.5 (all 6s) (all 7s) (7-10) (all 6s) (5-6) Bluecrop 6.5 7.5 8.0 6.5 5.5 (6-7) (7-8) (7-9) (6-7) (5-6) Draper 8.5 8.6 8.8 7.2 6.5 (8-9) (8-9) (8-9) (7-8) (5-9) Katandin 6 8.5 8.5 6.3 7.4 (4-8) (8-9) (8-9) (6-7) (7-8) Legacy 6.5 7.0 8.5 7.8 6.5 (6-7) (all 7s) (8-9) (7-8) (7-8) Two-year-old plants were set in 2013. Fruit evaluations were made when the bushes were 30-50% ripe. The rating scale for the vigor, hardiness and fruit characteristics were 1-9, with 1-4 = inferior, 5-6 = acceptable, 7 = good, 8 = excellent and 9 = superior. For bush habit, 1 = sprawling, 5 = bushy and 9 = upright.

(14) TABLE-US-00004 TABLE 3 Average fruit physical and biochemical characteristics of Katahdin compared to standard cultivars in Grand Junction Michigan (2016 & 2017). Weight Soluble Titratable Firmness Cultivar Year (g) solids acidity SS/TA (g/mm) Duke 2016 1.5a 11.6a 0.59a 19.7b 302b 2017 2.1a 12.0a 0.81c 14.8ab 183b Bluecrop 2016 1.6a 11.1a 0.80bc 13.9ab 202a 2017 2.3ab 11.8a 0.67b 17.6b 163a Draper 2016 2.1b 12.7c 0.89c 14.3ab 334h 2017 2.3ab 11.9a 1.05d 12.1a 167a Katandin 2016 2.1b 12.1b 0.91c 13.3a 302b 2017 2.5b 12.7b 1.01d 12.6a 165a Legacy 2016 2.0b 12.1b 0.73b 16.6b 301b 2017 2.1a 13.3b 0.52a 25.6c 173ab Three, five-fruit samples were evaluated when the bushes were 30-50% ripe.