Strawberry plant named ‘DrisStrawThirteen’

Abstract

This invention relates to a new and distinct cultivar of strawberry plant named ‘DrisStrawThirteen.’ The new cultivar is primarily characterized by having large-sized, fruit with strong sweetness and weak acidity and having a plant with resistance to powdery mildew and moderate resistance to Strawberry Mottle Virus, wind, drought, high temperatures, high pH, high soil salt levels and water logging.

Description

Genus and species: Fragaria×ananassa.

Variety denomination: ‘DrisStrawThirteen’.

BACKGROUND OF THE NEW PLANT

The present invention relates to a new and distinct strawberry cultivar designated ‘DrisStrawThirteen’ and botanically known as Fragaria×ananassa. This new strawberry cultivar was discovered in Ventura, Calif. in October 2005 and originated from a cross between the proprietary female parent ‘2K297’ (unpatented) and the male parent ‘Driscoll Ojai’ (U.S. Plant Pat. No. 18,575). The original seedling of the new cultivar was first asexually propagated at a nursery in Shasta County, Calif.

‘DrisStrawThirteen’ was subsequently asexually propagated in Shasta County, Calif. and underwent further testing in Ventura County, Calif. for four years. The present invention has been found to retain its distinctive characteristics through successive asexual propagations via stolons and tissue culture.

DESCRIPTION OF THE PHOTOGRAPHS

The accompanying color photographs show typical specimens of the new cultivar at various stages of development as nearly true as it is possible to make in color reproductions. The photographs were taken from 6-month-old plants.

FIG. 1 shows overall plant habit including fruit at various stages of development.

FIG. 2 shows leaves of the plant with three leaflets.

FIG. 3 shows both the upper side and underside of several of the flowers.

FIG. 4 shows the whole fruit.

FIG. 5 shows the fruit in longitudinal cross-section.

DESCRIPTION OF THE NEW CULTIVAR

The following description of ‘DrisStrawThirteen’ is based on observations taken in Ventura, Calif. from 2005 to 2009. This description is in accordance with UPOV terminology. Color designations, color descriptions, and other phenotypical descriptions may deviate from the stated values and descriptions depending upon variation in environmental, seasonal, climatic and cultural conditions. ‘DrisStrawThirteen’ has not been observed under all possible environmental conditions. The botanical description of ‘DrisStrawThirteen’ was taken from 6-month-old plants and the botanical descriptions of the comparison varieties, ‘Driscoll Ojai’ and ‘Driscoll El Dorado’ (U.S. Plant Pat. No. 16,238), were also taken from 6-month-old plants. Color terminology follows The Royal Horticultural Society Colour Chart, London (R.H.S.) (2001).

DETAILED BOTANICAL DESCRIPTION

Table 1 shows selected plant characteristics of the new variety compared with plant characteristics of ‘Driscoll Ojai’ and ‘Driscoll El Dorado.’ Plant characteristics include plant habit, terminal leaflet margin profile, insertion of achenes, and fruit production.

TABLE 1
			‘Driscoll El
Characteristic	‘DrisStrawThirteen’	‘Driscoll Ojai’	Dorado’
Plant habit	Globose	Globose	Flat globose
Terminal leaflet	Revolute to flat	Revolute	Revolute
margin profile			and flat
Insertion of	Level with surface	Level with	Below
achenes		surface	surface
Fruit production,	473.7	435.4	707.8
grams/plant

Table 2 shows plant characteristics of the new variety compared with plant characteristics of the commercial varieties ‘Driscoll Ojai’ and ‘Driscoll El Dorado.’ Plant characteristics include plant height, diameter, number of crowns per plant, habit, the density of individual plants and the vigor.

TABLE 2
			‘Driscoll El
Characteristic	‘DrisStrawThirteen’	‘Driscoll Ojai’	Dorado’
Plant height	20.6	22.9	19.0
(cm)
Plant diameter	36.0	35.4	34.7
(cm)
Number of	3	3	3
crowns/plant
Habit	Globose	Globose	Flat globose
Density of
individual plant	Medium	Medium	Medium
Vigor	Very strong	Medium	Medium

Table 3 shows leaf characteristics of the new cultivar compared with leaf characteristics of ‘Driscoll Ojai’ and ‘Driscoll El Dorado.’ Leaf characteristics include terminal leaflet length and width in centimeters, length to width ratio, number of teeth per terminal leaflet, shape of teeth, color of upper side and underside of leaf, leaf shape in cross section, leaf blistering, leaf glossiness, number of leaflets, terminal leaflet margin, terminal leaflet length to width ratio, overall leaf shape and shape of leaf apex and base.

TABLE 3
			‘Driscoll El
Leaf Characteristic	‘DrisStrawThirteen’	‘Driscoll Ojai’	Dorado’
Terminal leaflet	8.0	7.4	7.6
length (cm)
Terminal leaflet	7.4	6.7	6.8
width (cm)
Terminal leaflet
length/width ratio	1.1	1.1	1.1
No. teeth/terminal	21	22	22
leaflet
Shape of teeth	Rounded	Rounded	Rounded
Color of upper	RHS 137A (Dark	RHS 147A	RHS 147A
surface of leaf	green)	(Dark	(Dark yellow-
		yellow-green)	green)
Color of lower	RHS 148B	RHS 148C	RHS 148B
surface of leaf	(Medium	(Light	(Medium
	yellow-green)	yellow-green)	yellow-green)
Leaf shape in	Slightly concave	Slightly	Slightly
cross section		convex	concave
Leaf blistering	Medium	Medium	Medium
Leaf glossiness	Strong	Medium	Medium
No. leaflets	3 only	3 only	3 only
Terminal leaflet	Between revolute	Revolute	Both revolute
margin	and flat		and flat
Terminal leaflet:	As long as broad	As long as	As long as
length/width ratio		broad	broad
Terminal leaflet	Orbicular	Orbicular	Oval
shape
Terminal leaflet	Slightly oblique	Slightly	Slightly
base shape		oblique	oblique
Terminal leaflet	Rounded	Rounded	Rounded
apex shape

Table 4 shows information about the petiole, the petiolule, the bract, and the stipule of the new cultivar compared to ‘Driscoll Ojai’ and ‘Driscoll El Dorado.’ This includes petiole length in centimeters, petiole diameter in centimeters, petiole pubescence, pose of hairs on the petiole, color of the petiole, color of the petiolule, petiolule length in centimeters, petiolule diameter in centimeters, bract frequency per petiole, stipule length in centimeters, stipule width in centimeters, stipule pubescence and stipule anthocyanin coloration.

TABLE 4
			‘Driscoll El
Characteristic	‘DrisStrawThirteen’	‘Driscoll Ojai’	Dorado’
Petiole length (cm)	12.4	9.7	10.1
Petiole	0.355	0.358	0.332
diameter (cm)
Petiole pubescence	Medium	Medium	Medium
Petiole pose	Outwards	Outwards	Outwards
of hairs
Petiole color	RHS 145A	RHS 145A	RHS 146D
	(Medium	(Medium	(Medium
	yellow-green)	yellow-green)	yellow-green)
Petiolule color	RHS 145A	RHS 145A	RHS 146D
	(Medium	(Medium	(Medium
	yellow-green)	yellow-green)	yellow-green)
Petiolule	6.93	6.35	6.19
length (cm)
Petiolule	0.165	0.144	0.147
diameter (cm)
Bract frequency	1	1	0
Stipule length (cm)	3.2	3.7	3.0
Stipule width (cm)	1.073	1.204	1.074
Stipule pubescence	Medium	Medium	Medium
Stipule	RHS 150D (Light	RHS 142C	RHS 149B
anthocyanin	yellow-green)	(Light	(Medium
coloration		green)	yellow-green)

Table 5 shows stolon characteristics of the new cultivar compared to ‘Driscoll Ojai’ and ‘Driscoll El Dorado.’ These characteristics include the number of stolons, average number of daughter plants, the anthocyanin coloration of the stolons, the thickness of the stolons, and the pubescence of the stolons.

TABLE 5
			‘Driscoll El
Characteristic	‘DrisStrawThirteen’	‘Driscoll Ojai’	Dorado’
Stolon Number	Medium	Many	ND*
Average number of	50+	62	129
daughter plants
Stolon Anthocyanin	RHS 59B (Dark	RHS 61C	RHS 59C
	red-purple)	(Medium	(Dark
		red-purple)	red-purple)
Stolon Thickness	Thin	Medium	Thin
Stolon Pubescence	Sparse	Sparse	Medium
*ND = Not determined

Table 6 shows inflorescence characteristics of the new cultivar compared to ‘Driscoll Ojai’ and ‘Driscoll El Dorado.’ These characteristics include inflorescence position relative to foliage, time of flowering, relative flower size, flower diameter in centimeters (measured from petal tip to petal tip), petal shape, relative spacing of petals, petal apex, base and margin, petal length in centimeters, petal width in centimeters, petal length to width ratio, number of petals, petal color, calyx diameter in centimeters (measured on back of flower from sepal tip to sepal tip), diameter of calyx relative to corolla, diameter of inner calyx relative to outer, sepal shape, apex and margin, sepal length in centimeters (measured from sepal tip to point of attachment to receptacle), sepal width in centimeters, number of sepals, receptacle color and anther color.

TABLE 6
			‘Driscoll El
Characteristic	‘DrisStrawThirteen’	‘Driscoll Ojai’	Dorado’
Inflorescence	Between level with	Above	Above
position relative	and above
to foliage
Time of flowering	Medium	Medium	Medium
(50% of plants at
first flower)
Flower size	Medium	Medium	Medium
Flower	2.688	3.289	2.773
diameter (cm)
Petal shape	Orbicular	Orbicular	Orbicular
Petal spacing	Overlapping	Overlapping	Overlapping
Petal apex shape	Rounded	Rounded	Rounded
Petal margin	Entire	Entire	Entire
Petal base shape	Rounded	Rounded	Rounded
Petal length (cm)	1.531	1.571	1.496
Petal width (cm)	1.464	1.621	1.570
Petal length/width	As long as broad	As long as	As long as
ratio		broad	broad
Typical and	6	6	7
observed petal
number
Petal color	RHS 155B (White)	RHS 155D	RHS 155B
		(White)	(White)
Calyx diameter (cm)	3.897	4.518	4.271
Calyx diameter	Larger	Larger	Larger
relative to corolla
Inner calyx diameter	Same size	Same size	Same size
relative to outer
Sepal shape	Oval	Oval	Oval
Sepal apex shape	Convex	Convex	Convex
Sepal margin	Entire	Entire	Entire
Sepal length (cm)	1.538	1.787	1.654
Sepal width (cm)	0.628	0.802	0.674
Typical and	12	13	15
observed sepal
number
Receptacle color	RHS 154B (Light	RHS 1B	RHS 1A
	yellow-green)	(Medium	(Medium
		green-yellow)	green-yellow)
Anther color	RHS 17A (Medium	RHS 163B	RHS 163A
	yellow-orange)	(Medium	(Medium
		greyed-	greyed-
		orange)	orange)

Table 7 shows fruit characteristics of the new cultivar compared to ‘Driscoll Ojai’ and ‘Driscoll El Dorado.’ These characteristics include fruiting truss length in centimeters, fruiting truss diameter, number of berries per truss, fruiting truss attitude, fruiting truss color, fruit length in centimeters, fruit truss width in centimeters, fruit length to width ratio, fruit hollow length and width in centimeters, fruit hollow length to width ratio, fruit weight in grams, relative fruit size, predominant fruit shape, difference in shape between primary and secondary fruits, band without achenes, unevenness of fruit surface, fruit skin color, evenness of fruit color, fruit glossiness, insertion of achenes, achene coloration (sunward and shaded sides of berry) and the number of achenes per berry.

TABLE 7
			‘Driscoll El
Characteristic	‘DrisStrawThirteen’	‘Driscoll Ojai’	Dorado’
Fruiting truss	22.1	20.7	18.7
length (cm)
Fruiting truss	Medium	Medium	Medium
length-general
Fruiting truss	0.339	0.281	0.270
diameter (cm) at
base of truss
Number of berries	1	1	1
per fruiting truss
Fruiting truss	Prostrate	Prostrate	Prostrate
attitude
Fruiting truss color	RHS 144A	RHS 144A	RHS 144B
at base of truss	(Medium	(Medium	(Medium
	yellow-green)	yellow-green)	yellow-green)
Fruit length (cm)	5.262	4.310	4.904
Fruit width (cm)	5.196	3.888	4.237
Fruit length/width	1.0	1.1	1.2
ratio
Fruit hollow length	2.039	1.617	2.141
(cm)
Fruit hollow width	0.968	0.903	1.412
(cm)
Fruit hollow	2.1	1.8	1.5
length/width ratio
Fruit weight (g)	28.7	26.7	26.1
Relative fruit size	Large	Large	Large
Predominant fruit	Between conical	Conical	Conical and
shape	and almost		almost
	cylindrical		cylindrical
Difference in shape	Slight	Moderate	Slight
between primary &
secondary fruits
Band without	Medium	Narrow	Absent or
achenes			very narrow
Unevenness of fruit	Strong	Medium	Medium
surface
Fruit skin color	RHS 46A	RHS 45A	RHS 46A
	(Dark red)	(Medium red)	(Dark red)
Evenness of fruit	Even	Even	Slightly
color			Uneven
Fruit glossiness	Medium	Medium	Medium
Insertion of achenes	Level with surface	Level with	Below
		surface	surface
Achene coloration-	RHS 185A (Dark	RHS 178B	RHS 185A
sunward side of	greyed-purple)	(Dark	(Dark greyed-
berry		greyed-red)	purple)
Achene coloration-	RHS 153A	RHS 152D	RHS 153C
shaded side of	(Medium	(Medium	(Medium
berry	yellow-green)	yellow-green)	yellow-green)
Achenes per berry	358.7	234.5	215.3

Table 8 shows fruit characteristics of the new cultivar compared to ‘Driscoll Ojai’ and ‘Driscoll El Dorado.’ These characteristics include the harvest maturity, insertion of calyx, pose of calyx segments, size of calyx in relation to fruit, adherence of calyx, firmness of flesh, color of the fruit flesh, evenness of the flesh color, distribution of flesh color, hollow center, sweetness of fruit, acidity of fruit, texture of fruit when tasted, type of bearing, grams of fruit per plant.

TABLE 8
			‘Driscoll El
Characteristic	‘DrisStrawThirteen’	‘Driscoll Ojai’	Dorado’
Harvest maturity	Late December to	Late January to	Early January
	mid-June	late May	to late May
Insertion of calyx	Level	Level	Level
Pose of calyx	Reflexed	Reflexed	Reflexed
segments
Size of calyx in	From same size to	Between same	Between same
relation to fruit	larger	size and larger	size and larger
Adherence of	Strong	Strong	Strong
calyx
Firmness of flesh	Between soft and	Firm	Firm
	medium
Color of the flesh	RHS N155D	RHS 155D	RHS 155B
	(White)	(White) and	(White) and
	and RHS 45A	RHS N30A	RHS 42B
	(Dark Red)	(Dark orange-	(Medium red)
		red)
Evenness of flesh	Even	Even	Even
color
Distribution of	Marginal and	Only marginal	Marginal
flesh color	central		and central
Hollow center	Between small and	Between small	Between small
	medium	and medium	and medium
Sweetness	Strong	Medium	Medium
Acidity	Weak	Medium	Medium
Texture when	Fine	Medium	Medium
tasted
Type of bearing	Partially	Partially	Partially
	everbearing	everbearing	everbearing
Grams of	473.7	435.4	707.8
fruit/plant

Table 9 shows pest, stress and disease characteristics of the new cultivar compared to ‘Driscoll Ojai’ and ‘Driscoll El Dorado’.

TABLE 9
Pest, Stress or			‘Driscoll El
Disease	‘DrisStrawThirteen’	‘Driscoll Ojai’	Dorado’
Lygus hesperus	Moderately resistant	Susceptible	Susceptible
(Lygus bug)
Botrytis fruit rot	Moderately	Moderately	Susceptible
	susceptible	susceptible
Powdery mildew	Resistant	Moderately	Moderately
		susceptible	resistant
Verticillium wilt	Moderately	Susceptible	Moderately
	susceptible		susceptible
Strawberry mottle	Moderately resistant	Moderately	Moderately
virus		resistant	resistant
Xanthomonas	Moderately	Moderately	Moderately
fragariae	susceptible	susceptible	susceptible
Drought	Moderately resistant	ND*	ND
High temperatures	Moderately resistant	ND	ND
Wind	Moderately resistant	ND	ND
High pH	Moderately resistant	ND	ND
High soil salt levels	Moderately resistant	ND	ND
Water logging	Moderately resistant	ND	ND
*ND = Not determined

COMPARISON WITH PARENTAL AND COMMERCIAL CULTIVARS

When ‘DrisStrawThirteen’ is compared to the proprietary female parent ‘2K297’ (unpatented), ‘DrisStrawThirteen’ has larger fruit with a softer texture than does ‘2K297.’ In addition, ‘DrisStrawThirteen’ produces fruit three weeks earlier, has a more compact plant habit with darker foliage and is more rain tolerant than ‘2K297’.

When ‘DrisStrawThirteen’ is compared to the male parent ‘Driscoll Ojai’ (U.S. Plant Pat. No. 18,575), ‘DrisStrawThirteen’ produces fruit four weeks earlier than ‘Driscoll Ojai’. In addition, ‘DrisStrawThirteen’ is more rain tolerant, has a more compact plant habit with darker foliage than ‘Driscoll Ojai’ and hides its fruit underneath the canopy whereas ‘Driscoll Ojai’ has a more upright plant habit and presents its fruit above the canopy.

Claims

1. A new and distinct cultivar of strawberry plant as described and shown herein.