Predicting walnut (<i>Juglans</i> spp.) crop yield using meteorological and airborne pollen data

Prentović, Marija; Radišić, Predrag; Smith, Matt; Šikoparija, Branko

doi:10.1111/aab.12132

Cited by 4 publications

(2 citation statements)

References 53 publications

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“…The models were validated (tested) using 2 years of data not included in model construction. Following the method described by Prentović et al (2014), it was decided not to test the performance of the model using the two most recent years of data (i.e. 2011 and 2012).…”

Section: Model For Predicting Annual Variations In Ambrosia Pollen (Aap)mentioning

confidence: 99%

Is the recent decrease in airborne Ambrosia pollen in the Milan area due to the accidental introduction of the ragweed leaf beetle Ophraella communa?

Bonini¹,

Šikoparija

Prentović

et al. 2015

Aerobiologia

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This study aims to determine whether a significant decrease in airborne concentrations of Ambrosia pollen witnessed in the north-west of the Province of Milan in Northern Italy could be explained by environmental factors such as meteorology, or whether there is evidence to support the hypothesis that the decrease was related to the presence of large numbers of the oligophagous Ophraella communa leaf beetles that are used as a biological control agent against Ambrosia in other parts of the world. Airborne concentrations of Ambrosia, Cannabaceae and Urticaceae pollen data (2000-2013) were examined for trends over time and correlated with meteorological data. The amount of Ambrosia pollen recorded annually during the main flowering period of Ambrosia (AugustSeptember) was entered into linear regression models with meteorological data in order to determine whether the amount of airborne Ambrosia pollen recorded in 2013 was lower than would normally be expected based on the prevailing weather conditions. There were a number of significant correlations between concentrations of airborne Ambrosia, Cannabaceae and Urticaceae pollen, as well as between airborne pollen concentrations and daily and monthly meteorological data. The linear regression models greatly overestimated the amount of airborne Ambrosia pollen in 2013. The results of the regression analysis support the hypothesis that the observed decrease in airborne Ambrosia pollen may indeed be related to the presence of large numbers of O. communa in the Milan area, as the drastic decrease in airborne Ambrosia pollen in 2013 cannot be explained by meteorology alone.

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Section: Model For Predicting Annual Variations In Ambrosia Pollen (Aap)mentioning

confidence: 99%

Is the recent decrease in airborne Ambrosia pollen in the Milan area due to the accidental introduction of the ragweed leaf beetle Ophraella communa?

Bonini¹,

Šikoparija

Prentović

et al. 2015

Aerobiologia

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“…The production of nuts depends mainly on climatic conditions, particularly during pollination, and a sufficient amount of pollen in the environment plays a crucial role in this process ( Prentović et al., 2014 ).…”

Section: Introductionmentioning

confidence: 99%

Is apomixis occurring in walnut (Juglans regia L.)? New data from progeny molecular tests and cytological investigations shed light on its reproductive system

Solhjoo,

Fatahi,

Zamani

et al. 2023

Front. Plant Sci.

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IntroductionPersian walnut (Juglans regia) is an economically important nut fruit species cultivated worldwide for its nutritious kernel and timber quality wood. Walnut trees are mostly hetero-dichogamous and, depending on the genotype, some cultivars are protogynous, while others are protandrous. Although selfing is possible when male and female blooms overlap, the dichogamy of the species promotes outcrossing. In addition to sexual reproduction, some reports indicate that elements of apomixis may occur in commercial orchards of walnut varieties and in the last two decades, nut production by apomixis has been reported in walnut. However, there are no reliable studies on the occurrence of apomictic reproduction based on cytoembryological observations and/or molecular marker-progeny tests. This study addresses the combined use of molecular and cytological analyses to gain new insights into the population genetics and reproduction systems of J. regia.MethodsWe systematically analyzed the reproductive origin of individual progeny plants from 8 different cultivated walnut genotypes using microsatellite genotyping and carried out cytohistological investigations of 5 cultivated walnut genotypes arising seed sets from isolated flowers, to shed light on the mode of reproduction.Results and discussionThese cytometric and genotyping analyses did not support any asexual mode of reproduction or asexual propagation by seed and all individuals studied were identified as zygotic plants produced by crossing. Likewise, the cytological findings did not confirm completely the first component of apomixis, namely apomeiosis. On the other hand, according to histological evidence, adventitious embryony seems to take place at low frequency. Overall, our findings suggest that the occurrence of gametophytic apomixis is unlikely in J. regia, but sporophytic apomixis cannot be completely ruled out.

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Manual and automatic quantification of airborne fungal spores during wheat harvest period

2023

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Predicting walnut (Juglans spp.) crop yield using meteorological and airborne pollen data

Cited by 4 publications

References 53 publications

Is the recent decrease in airborne Ambrosia pollen in the Milan area due to the accidental introduction of the ragweed leaf beetle Ophraella communa?

Is the recent decrease in airborne Ambrosia pollen in the Milan area due to the accidental introduction of the ragweed leaf beetle Ophraella communa?

Is apomixis occurring in walnut (Juglans regia L.)? New data from progeny molecular tests and cytological investigations shed light on its reproductive system

Manual and automatic quantification of airborne fungal spores during wheat harvest period

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