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SNP markers reveal relationships between fruit paternity, fruit quality and distance from a cross‑pollen source in avocado orchards
Journal article   Open access   Peer reviewed

SNP markers reveal relationships between fruit paternity, fruit quality and distance from a cross‑pollen source in avocado orchards

Wiebke Kaemper, Steven Ogbourne, David Hawkes and Stephen Trueman
Scientific Reports, Vol.11, pp.1-8
2021
PMCID: PMC8501009
PMID: 34625603
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SNP markers reveal relationships between fruit paternity, fruit quality and distance from a cross-pollen source in avocado orchards1,006.65 kBDownloadView
Published Version Open Access CC BY V4.0
url
https://doi.org/10.1038/s41598-021-99394-7View
Published Version Open

Abstract

Ecology Environmental sciences Molecular biology Plant sciences
Cross‑pollination can improve fruit yield, fruit size and nutritional quality of many food crops. However, we rarely understand what proportions of the crop result from self‑ or cross‑pollination, how cross‑pollination affects crop quality, and how far pollen is transported by pollinators. Management strategies to improve pollination services are consequently not optimal for many crops. We utilised a series of SNP markers, unique for each cultivar of avocado, to quantify proportions of self‑ and cross‑paternity in fruit of Hass avocado at increasing distances from cross‑pollen sources. We assessed whether distance from a cross‑pollen source determined the proportions of self‑pollinated and cross‑ pollinated fruit, and evaluated how self‑ and cross‑paternity affected fruit size and nutritional quality. Avocado fruit production resulted from both self‑ and cross‑pollination in cultivar Hass in Queensland, Australia. Cross‑pollination levels decreased with increasing distance from a cross‑pollen source, from 63% in the row adjacent to another cultivar to 25% in the middle of a single‑cultivar block, suggesting that pollen transport was limited across orchard rows. Limited pollen transport did not affect fruit size or quality in Hass avocados as xenia effects of a Shepard polliniser on size and nutritional quality were minor.

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Horticulture

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