Effect of Triforine on Pollen Germination and Fruit Set in Highbush Blueberry

Plant Disease ◽  
1981 ◽  
Vol 65 (4) ◽  
pp. 350 ◽  
Author(s):  
Peter R. Bristow
Keyword(s):  
Pollen Germination ◽  
Fruit Set ◽  
Highbush Blueberry

scholarly journals The effect of pollenizer on the fruit set of plum cultivar Cacanska Najbolja

2012 ◽  
Vol 57 (1) ◽  
pp. 9-18 ◽  
Author(s):  
Dragan Nikolic ◽  
Vera Rakonjac ◽  
Milica Fotiric-Aksic
Keyword(s):  
Pollen Germination ◽  
Fruit Set ◽  
Open Pollination ◽  
In Vitro Pollen Germination ◽  
Controlled Pollination ◽  
Very High

In this paper, during a 4-year period (2003-2006) effects of six pollenizers (President, Italian Prune, Stanley, Cacanska Rodna, Agen 707, and California Blue) on the degree of fruit set in the plum cultivar Cacanska Najbolja were examined. Besides the controlled pollination of this cultivar, open pollination was investigated. Functional pollen ability in pollenizer-cultivars was established by in vitro pollen germination. Degree of fruit set was determined comparing the number of fruit set (10 days after pollination, 21 days after pollination and number of harvested fruits) against the number of pollinated flowers. The results indicated that all pollenizer cultivars, studied in this paper, possessed satisfactory in vitro pollen germination (30.1-67.4%). The number of fruit set determined 10 days after pollination was very high and did not differ among pollenizers. Highly significant differences were found between the pollenizers in the number of fruit set 21 days after pollination and significant ones in relation to the number of harvested fruits. Compared to open pollination, higher number of fruit set 21 days after pollination and higher number of harvested fruits were obtained when cultivars Stanley (17.0%; 7.6%) and Italian Prune (14.6%; 6.9%) were used as pollenizers, therefore those cultivars are recommendable as good pollenizers for the cultivar Cacanska Najbolja.

Effects of cadmium and copper on pollen germination and fruit set in pea (Pisum sativum L.)

2010 ◽  
Vol 125 (4) ◽  
pp. 551-555 ◽  
Author(s):  
Hattab Sabrine ◽  
Hedheli Afif ◽  
Banni Mohamed ◽  
Boussetta Hamadi ◽  
Herrero Maria
Keyword(s):  
Pisum Sativum ◽  
Pollen Germination ◽  
Fruit Set ◽  
Pisum Sativum L

scholarly journals Hybridization of Cultivated Highbush Blueberry with Vaccinium stamineum: Phenotype and Fertility of Backcross1 Populations

HortScience ◽  
2018 ◽  
Vol 53 (2) ◽  
pp. 159-166
Author(s):  
Paul M. Lyrene
Keyword(s):  
Fruit Set ◽  
Highbush Blueberry ◽  
Drought Tolerant ◽  
Flavor Components ◽  
Berry Quality

Nine F1 hybrids produced by crossing seven tetraploid highbush blueberry cultivars with three tetraploid Vaccinium stamineum genotypes were backcrossed to an array of highbush blueberry cultivars to produce 2500 Backcross1 (BC1) seedlings. Thirty of the most vigorous BC1 plants were intercrossed in a greenhouse. Fertility of the BC1 plants was studied by examining their pollen at 250× and by determining the number of well-developed seeds per pollinated flower after the crosses. Percent well-formed microspores averaged 62.7% for BC1 plants compared with 30.9% for their F1 hybrid parents. Fruit set percentage was high from the BC1 intercrosses, with an average of 9.29 plump seeds per pollinated flower. The 2500 BC1 seedlings in the field were highly variable in vigor, but fewer than 10% were as vigorous as the median vigor of highbush × highbush seedlings. BC1 plants in the field averaged ≈1 month later ripening than highbush × highbush seedlings and berries averaged slightly smaller. Berry clusters were very loose compared with those of highbush. Berry flavor was highly variable from plant to plant, but the berries averaged less sweet and lower in acid than highbush berries. New flavor components not found in highbush seedlings were found in only a few BC1 seedlings. Fresh berries from BC1 plants made bright red juice when crushed in water, whereas berries from most highbush cultivars produced brown to yellow juice/water mixes. Although berry quality in the BC1 population averaged lower than in highbush seedlings, some plants had berry quality as high as typical cultivars. Because V. stamineum is highly drought-tolerant, cultivars bred using V. stamineum introgression could have improved upland adaptation.

Calcium-Boron Addition Promotes Pollen Germination and Fruit Set of Mango

2016 ◽  
Vol 17 (2) ◽  
pp. 147-158 ◽  
Author(s):  
Ratthaphol Muengkaew ◽  
Peerasak Chaiprasart ◽  
Pheravut Wongsawad
Keyword(s):  
Pollen Germination ◽  
Fruit Set ◽  
Boron Addition

GENOTYPIC DIFFERENCES IN CARDINAL TEMPERATURES FOR IN VITRO POLLEN GERMINATION AND POLLEN TUBE GROWTH OF COCONUT HYBRIDS

2017 ◽  
Vol 54 (5) ◽  
pp. 731-743 ◽  
Author(s):  
C. S. RANASINGHE ◽  
M. D. P. KUMARATHUNGE ◽  
K. G. S. KIRIWANDENIYA
Keyword(s):  
High Temperature ◽  
Sri Lanka ◽  
Pollen Tube ◽  
Pollen Tube Growth ◽  
Pollen Germination ◽  
Fruit Set ◽  
Tube Growth ◽  
Tube Length ◽  
Cardinal Temperatures ◽  
Pollen Tube Length

SUMMARYSuccessful fruit set in coconut depends on several reproductive processes including pollen germination and pollen tube growth. High temperature (˃33 °C) during flowering reduces fruit set in coconut. Therefore, identification and development of coconut varieties or hybrids with high reproductive heat tolerance will benefit the coconut industry in view of the climate changes. This experiment was conducted to quantify the response of pollen germination and pollen tube growth of seven coconut hybrids to increasing temperature from 16 to 38 °C. A Principal Component Analysis (PCA) was carried out to classify coconut hybrids on the basis of their temperature tolerances to pollen germination. Pollen germination and pollen tube length of the hybrids ranged from 56 to 78% and 242 to 772 µm, respectively. A modified bilinear model best described the response to temperature of pollen germination and pollen tube length. Cardinal temperatures (Tmin, Topt and Tmax) of pollen germination and pollen tube length varied among the seven hybrids. PCA identified Tmax for pollen germination and Topt for pollen tube length as the most important parameters in describing varietal tolerance to high temperature. PCA also identified SLGD × Sri Lanka Tall and Sri Lanka Brown Dwarf × Sri Lanka Tall as the most tolerant hybrids to high temperature stress and Sri Lanka Tall × Sri Lanka Tall and Sri Lanka Green Dwarf × San Ramon as less tolerant ones based on cardinal temperatures for pollen germination and pollen tube length. Tmax for pollen germination of the most tolerant and less tolerant hybrids were 41.9 and 39.5 °C, respectively. Topt for pollen tube length in the most tolerant and less tolerant hybrids were 29.5 and 26.0 °C, respectively.

scholarly journals Effects of Ethylene on Fruit Set and Maturation of Highbush Blueberry (Vaccinium corymbosum L.).

1997 ◽  
Vol 66 (2) ◽  
pp. 267-272 ◽  
Author(s):  
Akira Suzuki ◽  
Toru Kikuchi ◽  
Koji Aoba
Keyword(s):  
Fruit Set ◽  
Vaccinium Corymbosum ◽  
Highbush Blueberry

scholarly journals Reproductive biology traits affecting productivity of sour cherry

2013 ◽  
Vol 48 (1) ◽  
pp. 33-41 ◽  
Author(s):  
Milica Fotiric Aksic ◽  
Vera Rakonjac ◽  
Dragan Nikolic ◽  
Gordan Zec
Keyword(s):  
Flowering Time ◽  
Reproductive Biology ◽  
Pollen Germination ◽  
Fruit Set ◽  
Principal Component ◽  
Sour Cherry ◽  
High Genetic Diversity ◽  
Breeding Programs ◽  
Factors Affecting ◽  
Yield Efficiency

The objective of this work was to evaluate variability in reproductive biology traits and the correlation between them in genotypes of 'Oblačinska' sour cherry (Prunus cerasus). High genetic diversity was found in the 41 evaluated genotypes, and significant differences were observed among them for all studied traits: flowering time, pollen germination, number of fruiting branches, production of flower and fruit, number of flowers per bud, fruit set, and limb yield efficiency. The number of fruiting branches significantly influenced the number of flower and fruit, fruit set, and yield efficiency. In addition to number of fruiting branches, yield efficiency was positively correlated with fruit set and production of flower and fruit. Results from principal component analysis suggested a reduction of the reproductive biology factors affecting yield to four main characters: number and structure of fruiting branches, flowering time, and pollen germination. Knowledge of the reproductive biology of the 'Oblačinska' genotypes can be used to select the appropriate ones to be grown or used as parents in breeding programs. In this sense, genotypes II/2, III/9, III/13, and III/14 have very good flower production and satisfactory pollen germination.

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