Evaluation of Pollen Quality and Self-Fertility in Selected Cultivars of Asian and European Pears

@article{Bieniasz2017EvaluationOP,
  title={Evaluation of Pollen Quality and Self-Fertility in Selected Cultivars of Asian and European Pears},
  author={Monika Bieniasz and Tom{\'a}{\vs} Ne{\vc}as and Ewa Dziedzic and Ivo Ondr{\'a}{\vs}ek and Bożena Pawłowska},
  journal={Notulae Botanicae Horti Agrobotanici Cluj-napoca},
  year={2017},
  volume={45},
  pages={375-382}
}
Asian pears have become increasingly popular in the European market, but their cultivation history in Europe is rather short. Pear is a demanding species in terms of pollen – donor cultivar. The self-fertility phenomenon in Asian pear cultivars is not currently known. The study was conducted in a 6-year pear orchard (of 23 Asian and 5 European cultivars) at the Mendel University in Lednice (Czech Republic). The following traits were assessed: number of pollen grains, pollen viability, pollen… 

Figures and Tables from this paper

Analysis of the Variability of Floral and Pollen Traits in Apple Cultivars—Selecting Suitable Pollen Donors for Cider Apple Orchards
TLDR
Large phenotypic variability was found among the studied cultivars indicating that the local germplasm collection provides a good source of genetic and phenotypesic diversity, however, low correlations were observed between floral biology traits and, consequently, the improvement in one trait seems not to affect other traits.
Effect of Genetically Diverse Pollen on Pollination, Pollen Tube Overgrow, Fruit Set and Morphology of Kiwiberry (Actinidia arguta)
TLDR
Determination of pollen tube growth on stigma and fruit development parameters, which were investigated in this study, can enable the evaluation of male–female compatibility—one of the factors of successful pollination.
Morphological variation of male A. arguta plants affects their flowering potential and pollen efficiency
TLDR
Male kiwiberry indicators developed in this study appear to be effective tools for the comparative evaluation of male A. arguta genotypes, indicating marked differences in their flowering potential and efficiency as pollinizers.
Insect pollinators of conference pear (Pyrus communis L.) and their contribution to fruit quality
TLDR
There was no effect of distance from the edge (up to 50 m) of orchard on the quality of pears, and no consistent difference in the guild of insects visiting at distances from the orchard boundary.
Success Rate of Individual Pollinizers for the Pear Cultivars “Ingeborg” and “Celina” in a Nordic Climate
Norwegian pear production is low due to climatic limitations, a lack of well-adapted cultivars and suitable pollinizers. However, nowadays it is increasing as a result of newly introduced and bred
The Effect of Titanium Organic Complex on Pollination Process and Fruit Development of Apple cv. Topaz
Optimal weather conditions are necessary for the proper course of the flowering process and high activity of pollinators, which is the most important factor affecting pollination. Because weather

References

SHOWING 1-10 OF 40 REFERENCES
Pollen factors controlling self-incompatibility strength in Japanese pear
TLDR
The results suggest that S-RNase functions as a cytotoxin on compatible pollen in a cultivar-dependent manner, and that the degree of inhibition is determined by pollen factor(s) unrelated to the S-locus.
Compatibility and pollinator efficiency tests on Pyrus communis L. cv. ‘Conference’
TLDR
The pollination efficiencies of honeybees and bumblebees were compared by examining pollen deposition and pollen tube growth following single floral visits, and higher quantities of more compatible pollen grains per stigma than honeybees were deposited.
Selection of pollinators for particular pear cultivars (Pyrus communis L.) based on the observation of the pollen tubes
TLDR
The aim of the present study was to learn problem of self-incompatibility or cross-compatibility of six pear (P. communis) cultivars and wild ecotype of P. pyraster and the evaluation of investigated cultivars as good polinators for each other.
Evaluation of three Asian pear cultivars for cultivation in commercial orchards
From 1999 to 2003, a trial was conducted of three Japanese cultivars of Asian pear (Pyrus serotina Rehder) in terms of growth, yield and fruit quality. The cultivars evaluated were 'Shinseiki',
Pollen-stigma interaction which might be critical to the gametophytic incompatibility of Japanese pear.
TLDR
It was suggested that the stigma might play some significant role in the function of incompatibility of Japanese pear.
Stigmatic Receptivity Limits the Effective Pollination Period in `Agua de Aranjuez' Pear
TLDR
It is suggested that stigmatic receptivity could be an important factor limiting pear fl ower receptivity and hence cropping performance under warmer conditions and that EPP values per se do not have a special relevance.
Effects of varying pollen load on fruit set, seed set and seedling performance in apple and pear
TLDR
The results indicate that gametophytic competition may occur in apple crosses, but that it is probably weaker in pear, and with respect to scab resistance and mildew attack, no differences among treatments were found.
Establishment of growth medium and quantification of pollen grains and germination of pear tree cultivars
TLDR
The protocol for germination of pollen grains of pear tree consist in the culture medium have to be solidified with 10 g L-1 agar, being the pH measured to 5,2, and number of stamens, the number of pollen grain per anther and per flower was evaluated.
Pollen density on the stigma affects endogenous gibberellin metabolism, seed and fruit set, and fruit quality in Pyrus pyrifolia
TLDR
Endogenous gibberellin concentrations increased in pollen tubes soon after germination and the concentration of two growth-active GAs, GA3, and GA4, was positively correlated to final fruit size, cell numbers in the mesocarp, and pollen tube growth rate.
...
...