Fig 1.
(a) Daily maximum and minimum temperature and (b) mean (± SE) photosynthetic photon flux density (PPFD) in the glasshouse during flowering and fruit set of Redlands Joy, Sugarbaby and Rubygem strawberry.
The durations of hand-pollinations of flowers and harvesting of ripe fruit are indicated in panel (a).
Fig 2.
Experimental potted plants of strawberry in the glasshouse, with fruits at (a) immature stage and (b) mature stage (ripe fruit indicated by arrow). Typical colour of cultivar Redlands Joy fruit arising from (c) unassisted self-pollination, or hand-pollination with (d) self-pollen or cross-pollen from (e) cultivar Sugarbaby or (f) cultivar Rubygem. Scale bars = 1 cm. Photographs: Cao Dinh Dung.
Table 1.
Plant yield and individual size, shape and time to maturity of Redlands Joy strawberry fruit arising from unassisted self-pollination (Autogamy) or hand-pollination with self-pollen (Self) or cross-pollen from another cultivar (Sugarbaby or Rubygem).
Fig 3.
(a) Brightness (L*), (b) redness (a*), and (c) yellowness (b*) of Redlands Joy strawberry fruit arising from unassisted self-pollination (Autogamy) or hand-pollination with self-pollen (Self) or cross-pollen from another cultivar (Sugarbaby or Rubygem).
Means + SE with different letters are significantly different (GLM; P < 0.05; n = 460–521 fruit).
Fig 4.
(a) Concentration of total soluble solids (TSS; °Brix), (b) acid (%), and (c) °Brix:acid ratio of Redlands Joy strawberry fruit arising from unassisted self-pollination (Autogamy) or hand-pollination with self-pollen (Self) or cross-pollen from another cultivar (Sugarbaby or Rubygem).
Means + SE with different letters are significantly different (GLM; P < 0.05; n = 99–100 fruit).
Fig 5.
(a) Firmness and (b) shelf life of Redlands Joy strawberry fruit arising from unassisted self-pollination (Autogamy) or hand-pollination with self-pollen (Self) or cross-pollen from another cultivar (Sugarbaby or Rubygem).
Means + SE with different letters are significantly different (GLM; P < 0.05; n = 410–467 fruit for firmness and n = 48–50 fruit for shelf life).
Table 2.
Mineral nutrient concentrations (mg/100g fresh mass) in Redlands Joy strawberry fruit arising from unassisted self-pollination (Autogamy) or hand-pollination with self-pollen (Self) or cross-pollen from another cultivar (Sugarbaby or Rubygem).
Fig 6.
(a) Number of fertilized seeds and (b) percentage of seeds that are fertilized on Redlands Joy strawberry fruit arising from unassisted self-pollination (Autogamy) or hand-pollination with self-pollen (Self) or cross-pollen from another cultivar (Sugarbaby or Rubygem).
Means + SE with different letters are significantly different (GLM; P < 0.05; n = 100 fruit).
Fig 7.
Relationship between the number of fertilized seeds and fresh mass of Redlands Joy strawberry fruit arising from unassisted self-pollination (Autogamy) or hand-pollination with self-pollen (Self) or cross-pollen from another cultivar (Sugarbaby or Rubygem) (linear regression, P < 0.001; n = 100 fruit).
Table 3.
Coefficients of determination for linear regressions between the number of fertilized seeds and the physical and chemical attributes of Redlands Joy strawberry fruit arising from unassisted self-pollination (Autogamy) or hand-pollination with self-pollen (Self) or cross-pollen from another cultivar (Sugarbaby or Rubygem).