First note of QTL mapping of low vigor traits using the updated F2 ‘Koroneiki’ linkage map of olive

Frontiers in Plant Science, Journal Year: 2025, Volume and Issue: 16

Published: Jan. 31, 2025

The olive tree (Olea europaea L.), which characterizes the agriculture of Mediterranean basin, faces challenges adapting to high-density orchards and mechanized cultivation. This study addresses a key issue: controlling size enhance efficiency manageability in Utilizing genetic mapping methods, we have identified significant Quantitative Trait Loci (QTL) candidate genes associated with low-vigor traits trees. Our research on 'Koroneiki' F2 progeny, exhibits low vigor but remains underutilized breeding programs, has pinpointed QTL linked trunk basal diameter-a trait correlated plant height based morphological measurements. Results underscore strong control these traits, consistent correlation observed over time. We two - Acid Phosphatase 1, Shikimate O-hydroxycinnamoyltransferase, SNP Marker likely Calcium Responsive Proteins each potentially interacting hormones influence growth. Controlling presents several challenges, including complexity polygenic like vigor, limited rootstock options. By integrating reference genomes our analysis, offer conceptual advancement that could substantially accelerate timelines compared traditional approaches. Although genome editing is still future possibility due genetics species' recalcitrance transformation, lays foundational understanding guide programs. targeting genes, this represents pivotal step toward selecting new genotypes rootstocks, contributing innovations

Language: Английский

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Olive (Olea europaea L.) reproductive biology: implications for yield, compatibility conundrum, environmental constraints

Journal of Experimental Botany, Journal Year: 2024, Volume and Issue: 75(14), P. 4300 - 4313

Published: April 25, 2024

Olive (Olea europaea L.) is an important Mediterranean tree species with a longstanding history of cultivation, boasting diverse array local cultivars. While traditional olive orchards are valued for their cultural and aesthetic significance, they often face economic sustainability challenges in the modern context. The success both newly introduced cultivars (e.g. those obtained by cross-breeding) hindered self-incompatibility, prevalent issue this that results low fruit set when limited genetic diversity present. Further, biological, environmental, agronomic factors have been shown to interlink shaping fertilization patterns, hence impacting on final yield. Climatic conditions during pollination, such as excessive rainfall or high temperatures, can further exacerbate problem. In work, we provide overview various trigger phenomenon suboptimal trees. This work provides comprehensive understanding interplay among these factors, shedding light potential mechanisms pathways contribute observed outcomes context self-incompatibility olive.

Language: Английский

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Phylogenetics and biogeography of the olive family (Oleaceae)

Annals of Botany, Journal Year: 2024, Volume and Issue: 134(4), P. 577 - 592

Published: June 22, 2024

Progress in the systematic studies of olive family (Oleaceae) during last two decades provides opportunity to update its backbone phylogeny and investigate historical biogeography. We also aimed understand factors underlying disjunct distribution pattern between East Asia both West Europe that is found more commonly this than any other woody plant family. Using a sampling 298 species out ~750, largest phylogenetic study Oleaceae thus far, with set 36 plastid nuclear markers, we reconstructed dated new tree based on maximum likelihood Bayesian methods checked for reticulation events. assessed relative support four competing hypotheses [Qinghai-Tibet Plateau uplift (QTP-only hypothesis); climatic fluctuations (climate-only combined effects QTP climate (QTP-climate no (null hypothesis)] explaining these distributions. recovered all tribes subtribes within as monophyletic, but uncertainty position tribe Forsythieae remains. Based dataset, event was detected. Our biogeographical analyses QTP-climate hypothesis likely main explanation East-West Eurasian disjunctions Oleaceae. results show an earlier origin at ~86 Mya role Tropical source dispersals. family-wide extensive highlights stable relationships Oleaceae, including polyphyly genus Chionanthus, need further most undersampled genera (Chionanthus Jasminum). Increased will help fine-tune across spatial scales geological times.

Language: Английский

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Backcrossing Failure between Sikitita Olive and Its Male Parent Arbequina: Implications for the Self-Incompatibility System and Pollination Designs of Olive Orchards

Plants, Journal Year: 2024, Volume and Issue: 13(20), P. 2872 - 2872

Published: Oct. 14, 2024

Backcrossing between Sikitita and its male parent Arbequina, offers the possibility to check suitability of different self-incompatibility models proposed for olive. To determine Sikitita's response self- cross-pollination treatments, including pollination with father we compared parameters following pollen-pistil interaction, resulting initial final fruit set, paternity seeds produced under crosses. The results showed that behaves as a self-incompatible cultivar due inhibition pollen tube growth in pistil self-pollinated flowers. This incompatibility reaction led significant reduction self-fertilization set. Seed analyses confirmed Sikitita. A similar was observed flowers when hand-pollinated Arbequina Koroneiki. On contrary, Arbosana gave excellent results, showing is largely preferred by more than other cultivars presented orchard. backcross failure suggests system olives not gametophytic type. In contrast, tests fit features previously reported sporophytic systems. However, some amendments are proposed, among them groups

Language: Английский

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