Pollen Ole e 1 content variations in olive cultivars of different Portugal regions

Fernández-González, María; Ribeiro, Helena; Pereira, Sónia; Rodríguez-Rajo, F. J.; Abreu, Ilda

doi:10.1007/s10453-020-09688-y

Cited by 2 publications

(1 citation statement)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Interestingly, environmental factors do not have the same impact on all cultivars ( Lavee, 2007 ; Medina-Alonso et al , 2020 ; Fernández-González et al , 2021 ). In our study, the interaction cultivar × year accounted for 8.4 % of the total variance, considered a medium effect in multifactorial experiments ( Cohen, 1988 ).…”

Section: Discussionmentioning

confidence: 96%

Pollen production in olive cultivars and its interannual variability

Rojas-Gómez,

Moral,

López-Orozco

et al. 2023

Annals of Botany

View full text Add to dashboard Cite

Background and Aims Olive (Olea europaea subsp. europaea var. europaea) is the most extensively cultivated fruit crop worldwide. It is considered a wind-pollinated and strictly outcrossing crop. Thus, elevated pollen production is crucial to guarantee optimum fruit set and yield. Despite these facts, the variability of pollen production within the cultivated olive has been scarcely studied. This study is aimed to characterize this feature by analysing a representative set of worldwide olive cultivars. Methods We evaluated the average pollen grains per anther in 57 principal cultivars over three consecutive years. We applied a standard generalized linear model (GLM) approach to study the influence of cultivar, year and previous year fruit load on the amount of pollen per anther. Additionally, the K-means method was used for cluster analysis to group cultivars based on their pollen production capacity. Key results Pollen production per anther was highly variable among olive cultivars. The cultivar significantly accounted for 51.3% of the variance in pollen production and the year for 0.3%. The interaction between both factors explained 8.4% of the variance, indicating that not all cultivars were equally stable in producing pollen across the years. The previous year fruit load and its interaction with the year were significant, but barely accounted for 1.5% of the variance. Olive cultivars were classified into four clusters according to their capacity to produce pollen. Interestingly, the fourth cluster was composed of male-sterile cultivars, which presumably share this character by inheritance. Conclusions Pollen production per anther varied extensively within the cultivated olive. This variation was mainly driven by the cultivar and its interaction with the year. The differential capacity of olive cultivars to produce pollen should be considered not only for designing new orchards but also gardens where this species is used as ornamental.

show abstract