In most temperate fruit trees, fruits are located on one-year old shoots. In Prunus species, flowers and fruits are born in axillary position along those shoots. The axillary bud fate and branching patterns are thus key components of the cultivar potential fruit production. The objective of this study was to analyze the branching and bearing behaviors of 1-year-old shoots of apricot cultivars and clones genetically closely related. Shoot structures were analyzed in terms of axillary bud fates using hidden semi-Markov chains and compared depending on the genotype, year and shoot length. The shoots were composed of three successive zones containing latent buds (basal zone), central flower buds (median zone) and vegetative buds (distal zone), respectively. The last two zones contained few associated flower buds. The zones length (in number of metamers) and occurrence strongly depended on shoot development in the two successive years. With decrease in the number of metamers per shoot, the last two zones become shorter or may not develop. While the number of metamers of the basal and distal zones and the number of associated flower buds correlated to the number of metamers of the shoot, the number of metamers of the median zone and the transition probability from the median to the distal zone were cultivar specific.

Department of Fruit Growing Faculty of Horticulture Mendel University Brno Czech Republic

Research and Breeding Institute of Pomology Holovousy Ltd Hořice Czech Republic

UMR AGAP CIRAD CIRAD INRA Montpellier SupAgro Université de Montpellier Montpellier France

UMR AGAP INRA CIRAD INRA Montpellier SupAgro Université de Montpellier Montpellier France

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Barthélémy D. and Caraglio Y. Plant Architecture: A Dynamic, Multilevel and Comprehensive Approach to Plant Form, Structure and Ontogeny. Annals of Botany, 2007, 99: 375–407. 10.1093/aob/mcl260 PubMed DOI PMC

Gordon D., DeJong T.M. Current-year and Subsequent-year Effects of Crop-load Manipulation and Epicormic-shoot Removal on Distribution of Long, Short and Epicormic Shoot Growth in Prunus persica. Annals of Botany, 2007, 99(2): 1–10. 10.1093/aob/mcl262 PubMed DOI PMC

Meier A.R., Saunders M.R., Michler C.H. Epicormic buds in trees: a review of bud establishment, development and dormancy release. Tree Physiology, 2012, 32: 565–584. 10.1093/treephys/tps040 PubMed DOI

Costes E., Guédon Y., Fournier D. Analysis and modelling of fruit tree axillary shoot and flowering distribution. Fruits, 1999, 54: 431–440.

Guédon Y., Barthélémy D., Caraglio Y., Costes E. Pattern Analysis in Branching and Axillary Flowering Sequences. Journal of Theoretical Biology, 2001, 212: 481–520. 10.1006/jtbi.2001.2392 PubMed DOI

Costes E., Guédon Y. Modelling Branching Patterns on 1-year-lod Trunk of Six Apple Cultivars. Annals of Botany, 2002, 89: 513–524. 10.1093/aob/mcf078 PubMed DOI PMC

Puntieri J.G., Stecconi M., Barthélémy D. Preformation and neoformation in shoot of Nothofagus Antarctica (G. Forster) Oerst. (Nothofagaceae) Shrubs from Northern Patagonia. Annals of Botany, 2002, 89: 665–673. 10.1093/aob/mcf108 PubMed DOI PMC

Costes E. Winter Bud Content According to Position in 3-year-old Branching Systems of `Granny Smith’ Apple. Annals of Botany, 2003, 92: 581–588. 10.1093/aob/mcg178 PubMed DOI PMC

Gordon D., Damiano C., DeJong T.M. Preformation in vegetative buds of Prunus persica: factors influencing number of leaf primordia in overwintering buds. Tree Physiology, 2006, 26: 537–544. 10.1093/treephys/26.4.537 PubMed DOI

Renton M., Guédon Y., Godin Ch. Costes E. Similarities and gradients in growth unit branching patterns during ontogeny in ‘Fuji’ apple trees: a stochastic approach. Journal of experimental Botany, 2006, 57: 3131–3143. 10.1093/jxb/erl075 PubMed DOI

Jackson D.I. Effects of water, light, and nutrition on flower-bud initiation in apricots. Australian Journal of Biological Sciences, 1969, 22: 69–75.

Jackson D.I. Effects of temperature and nutrition on growth and flower-bud initiation in apricots. New Zealand Journal of Agricultural Research, 1970, 13: 726–734.

Hipps N.A., Pagès L., Huguet J.G., Serra V. Influence of controlled water supply on shoot and root development of young peach trees. Tree Physiology, 1995, 15: 95–103. 10.1093/treephys/15.2.95 PubMed DOI

Negrón C., Contador L., Lampinen B.D., Metcalf S.G., Costes E., Guédon Y., et al. Differences in proleptic and epicormic shoot structures in relation to water deficit and growth rate in almond trees (Prunus dulcis). Annals of Botany, 2013a, 113: 545–554. 10.1093/aob/mct282 PubMed DOI PMC

Alburquerque N., Burgos L., Egea J. Apricot flower bud development and abscission related to chilling, irrigation and type of shoots. Scientia Horticulturae, 2003, 98: 265–276. 10.1016/S0304-4238(02)00202-9 DOI

Viti R., Bartolini S., Andreini L. Apricot Flower Bud Development: Main Biological, Physiological and Environmental Aspects Related to the Appearance of Anomalies. International Journal of Plant Developmental Biology, 2008, 2(1): 25–34.

Julian C., Herrero M., Rodrigo J. Flower bud differentiation and development in fruiting and non-fruiting shoots in relation to fruit set in apricot (Prunus armeniaca L.). Trees, 2010, 24: 833–841. 10.1007/s00468-010-0453-6 DOI

Sprugel D.G., Hinckley T.M., Schaap W. The theory and practice of branching autonomy. Annual Review of Ecology, Evolution, and Systematics, 1991, 22: 309–334.

Marshal J., Basile B., Solari L. DeJong T.M. Influence of branch autonomy on fruit, scaffold, trunk and root growth during Stage III of peach fruit development. Tree Physiology, 2003, 23: 313–323. 10.1093/treephys/23.5.313 PubMed DOI

Lespinasse J.M. La conduit du pommier I. Types de fructification Incidence sur la counduite de l’arbre. Paris: INVUFLEC, 1977.

Costes E., Fournier D., Audergon J.M., Legave J.M., Clauzel G. Architectural Diversity of Apricot Trees: which Morphological Characters Can Be Used to Classify Cultivars? Acta Horticulturae, 2006a, 701: 105–112. 10.17660/ActaHortic.2006.701.13 DOI

Torrecillas A., Domingo R., Galego R., Ruiz-Sánchez M.C. Apricot tree response to withholding irrigation at different phenological periods. Scientia Horticulturae, 2000, 3: 201–215.

Tromp J., Webster A.D., Wertheim S.J. Fundamentals of Temperate Zone Tree Fruit Production. pp. 400, ISBN 90-5782-152-4. (Backhuys Publishers, 2005, Leiden, the Netherlands.)

Tombesi S., Lampinen B.D., Metcalf S., DeJong T.M. Relationships between spur- and orchard-level fruit bearing in almond (Prunus dulcis). Tree Physiology, 2011, 31: 1413–1421. 10.1093/treephys/tpr119 PubMed DOI

Lampinen B.D., Tombesi S., Metcalf S.G., DeJong T.M. Spur behaviour in almond trees: relationships between previous year spur leaf area, fruit bearing and mortality. Tree Physiology, 2011, 31: 700–706. 10.1093/treephys/tpr069 PubMed DOI

Costes E., Guédon Y. Modelling the sylleptic branching on one-year-old trunks of apple cultivars. Journal of the American Society of Horticultural Science, 1997, 122: 53–62.

Costes E., Guédon Y. Modelling the annual shoot structure of the apricot tree (c.v. Lambertin) in terms of axillary flowering and vegetative growth. Acta Horticulturae, 1996, 416: 21–28. 10.17660/ActaHortic.1996.416.2 DOI

Fournier D., Guédon Y., Costes E. A comparison of different fruiting shoots of peach trees. Acta Horticulturae, 1998, 465: 557–566.

Costes E., Crespel L., Denoyes B. Morel P., Demene M.N. Lauri P.E., et al. (2014). Bud structure, position and fate generate various branching patterns along shoots of closely related Rosaceae species: a review. Frontiers in Plant Science, 5: 666 10.3389/fpls.2014.00666 PubMed DOI PMC

Crabbé J., and Escobedo-Alvarez J. A. Activités méristématiques et cadre temporel assurant la transformation florale des bourgeons chez le Pommier (Malus × domestica Borkh., cv. Golden Delicious) 1991, p. 369–379. In: Edelin C (ed.), L’Arbre, Biologie et développement, 2ème Colloque International sur l’Arbre. Montpellier, France: Hors Série.

Negrón C., Contador L., Lampinen B.D., Metcalf S.G., DeJong T.M., Guédon Y., et al. Systematic Analysis of Branching Patterns of Three Almond Cultivars with Different Tree Architectures. Journal of the American Society of Horticultural Science, 2013b, 138: 407–415.

Champagnat P. Formation of the trunk in woody plants, 1978, p. 401–422. In: Tomlinson P.B and Zimmermann M.H (eds.). Tropical trees as living systems. Cambridge Univ. Press, Cambridge, U.K.

Costes E., Lauri P.E., Regnard J.L. Analyzing fruit tree architecture: implications for tree management and fruit production. Horticultural reviews, 2006b, 32: 1–61. ISBN 0-471-73216-8.

Costes E. Architecture aérienne de l’Abricotier en développement libre. Acta Botanica Gallica, 1993, 140: 249–261. 10.1080/12538078.1993.10515595 DOI

Vachůn, Z. Clonal selection on apricots (cultivar Velkopavlovická). [Habilitation thesis]. Agriculture University in Brno. Lednice, Czech Republic, 1992, pp. 205.

Maghuly F., Fernandez E.B., Ruthner S., Pedryc A., Laimer M. Microsatellite variability in apricots (Prunus armeniaca L.) reflecting their geographic origin and breeding history. Tree Genetics and Genomes, 2005, 1: 151–165. 10.1007/s11295-005-0018-9 DOI

Baránek M., Mészáros M., Sochorová J., Čechová J., Raddová J. Utility of retrotransposon-derived marker systems for differentiation of presumed clones of the apricot cultivar Velkopavlovická. Scientia Horticulturae, 2012, 143: 1–6. 10.1016/j.scienta.2012.05.022 DOI

Guédon Y. Estimating hidden semi-Markov chains from discrete sequences. Journal of Computational and Graphical Statistics, 2003, 12(3), 604–639.

Pradal Ch., Dufour-Kowalski S., Boudon F., Fournier Ch., Godin Ch. OpenAlea: a visual programming and component-based software platform for plant modelling. Functional Plant Biology, 2008, 35: 751–760. 10.1071/FP08084 PubMed DOI

Mićić N., Đurić G., Cvetković M., & Stojnić S. Shoot growth pattern and degree of flower bud differentiation in yield potential modelling in apricot. In III Balkan Symposium on Fruit Growing, 2016, 1139: 291–298. 10.17660/ActaHortic.2016.1139.51 DOI