53. Volume 13- Number 1 - IP Australia

DESCRIPTIONS
PLANT VARIETIES JOURNAL 2000 VOL 13 NO. 1
in cross section, margin ciliate, weak puckering on upper
side of blade, upper surface medium green colour (RHS
146A), lower surface light green colour (RHS 147B),
glaucosity absent on lower surface of blade, variegation
absent, spines on main veins of lower side absent, hairs on
petiole medium density, anthocyanin coloration on upper
side of petiole weak. Inflorescence: predominate number of
flowers one. Flower: early, pedicel medium length,
diameter large (mean 52.9 mm), pedicel hairs short, number
of sepals >5, petals overlapping, petals curving upwards at
tip, petal shoulder present, petal margins crimped, petal
primary colour white (RHS 155D), petal colour distribution
even, filament colour white, anther colour yellow, number
of styles many (mean 34.6), colour of styles white, styles
erect and curved at tip only, hair at base of styles short,
amount of hair on ovary strongly expressed. Fruit: medium
size (mean 110g), general shape ovoid, length 79.1mm,
maximum width 53.1 mm, minimum width 49.1 mm, cross
section at median elliptical, ridging absent, shape of stylar
end protruding (very raised), shape of shoulder on stalk end
rounded, sepals present at harvest, adherence of skin to
flesh medium (not easy to peel), lenticels absent on skin,
skin colour when ripe light brown (RHS 199A and 161A),
hairs on skin sparse, pubescent, and uniform distribution
over the fruit, colour of hairs at harvest white, adherence of
hairs to skin when rubbed weak, core diameter small
(9mm), core shape elliptical, core woody spike absent, outer
pericarp colour at maturity (fruit soft) yellow (RHS 12C-
12B), inner pericarp colour at maturity (fruit soft) greyishyellow
(RHS 162A-162C), fruit core colour at maturity
(fruit soft) white (RHS 159C), fruit seed colour at harvest,
while still in flesh, black (RHS 200A), seed colour when
dry brown (RHS 200D), brix level at maturity for
consumption high (15.6% ), vitamin C content medium
(120 mg/100g fresh weight) Plant: time of vegetative
budbreak very early (early Sep), time of beginning of
flowering early (mid Oct), time of maturity for harvest late
(early May). (Note: all RHS colour chart numbers refer to
1986 edition.)
Origin and Breeding Controlled pollination: seed parent
CK01_01_01 x pollen parent CK15_01. The seed parent
was characterised by pale yellow flesh with a faint band of
red pigment around the central core, fruit size 40g, sweet
flavour, slightly flattened ovoid shape. The pollen parent
was chosen because its sisters had large fruit and the aim of
the cross was to increase fruit size and combine with good
flavour and yellow flesh. Crossing took place in Oct 1987
in Auckland, New Zealand. From this cross seedling
number 37-1-16A, later coded to CK01_02_01_01 and
finally named ‘Hort16A’ was selected in 1991. Selection
criteria: large fruit size, sweet tasting, yellow coloured
flesh, good storage life. The seed parent can be
distinguished from the candidate variety by comparing fruit
size, internal flesh colour and stylar end shape. Mean fruit
size of the parent is 40g while that of ‘Hort16A’ is over 90g.
‘Hort16A’ does not have any band of red pigment around
the core of the fruit. The stylar end projection of ‘Hort16A’
fruit is very prominent while that of CK01_01_01 is only
slightly projecting. Propagation: ‘Hort16A’ will be
propagated by vegetative cuttings or by grafting on to
seedling or clonal A. deliciosa or A. chinensis rootstocks.
Breeders: Mark McNeilage, Russell Lowe, Hinga Marsh,
The Horticulture and Food Research Institute of New
Zealand Ltd.
Choice of Comparator ‘KI89’ is a selection of A.chinensis
which has been published as US PP 8,479. Currently there
are very few other known selections grown outside China.
Fruit of ‘KI89’ have typical A.chinensis external
appearance, i.e. light brown skin with pubescent hair but
can be distinguished from ‘Hort16A’ by the shape of the
fruit (obovoid vs. ovoid in Hort16A) and the stylar end
shape (hollow vs. protruding in ‘Hort16A’). Plants of
‘KI89’ are being grown in the plant collection at Te Puke
where it is known as accession CK36_01 or ‘Act 2’. The
seed parent was not considered for a comparator as the fruit
is about half the size of ‘Hort16A’, which is easily
distinguishable. The pollen parent was not considered for
the trial as kiwifruit plants are dioecious and thus male
plants produce no fruit.
Comparative Trial: Comparator: ‘KI89’. Location: Te
Puke Research Centre, Te Puke, New Zealand (Latitude 37°
49´ South) 1991/97. Conditions: 80 vines of ‘Hort16A’
were established in 1993 and commenced significant
fruiting two years later. The comparison vines of ‘KI89’
grafted in 1992 were located in a block nearby on the same
property and under the same management conditions. Vine
spacing was 5m between rows and 6m between plants in the
row. Measurements: taken from 10 plants at random, one
sample per fruiting cane per plant.
Prior Applications and Sales
Country Year Current Status Name Applied
New Zealand 1995 Granted ‘Earligold’*
USA 1997 Accepted ‘Hort16A’
EU 1998 Accepted ‘Hort16A’
Japan 1998 Accepted ‘Hort16A’
*name subsequently changed to ‘Hort16A’
First sold in Belgium in May 1997. First sale in Australia
Nil.
Description: Russell G. Lowe, The Horticulture and Food Research
Institute of New Zealand Ltd., Te Puke, New Zealand.
Table 1 Actinidia varieties
‘Hort16A’ *‘KI89’
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PLANT CHARACTERISTICS
sex expression female female
ploidy diploid tetraploid
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YOUNG SHOOT CHARACTERISTICS
hairs present present
density of hair medium medium
hair type pubescent pubescent
anthocyanin coloration absent absent
in growing tip
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STEM CHARACTERISTICS
diameter medium large
colour on upper yellow-brown orange-brown
side of shoot RHS 200B-200C, RHS 165A
165A
conspicuousness conspicuous conspicuous
of lenticels
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