Genotypic Differences in Branching Pattern and Fruiting Habit in Common Walnut (Juglans regia L.)

Solar, A.; Štampar, Franci

doi:10.1093/aob/mcg137

Cited by 38 publications

(14 citation statements)

References 16 publications

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“…Terminal bearer Franquette had longer 1Y with more nodes than the lateral bearer Lara, confirming the previous results (Solar and Š tampar 2003;Solar et al 2006).…”

Section: Discussionsupporting

confidence: 90%

Branching of annual shoots in common walnut (Juglans regia L.) as affected by bud production and indol-3-acetic acid (IAA) content

Solar

Osterc

Štampar

et al. 2011

Trees

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Relationship of bud production (axillary and terminally) of annual shoot (1Y) and/or the content of budderived indol-3-acetic acid (IAA) to branching of the 1Y was studied in common walnut (Juglans regia L.), cvs. Franquette and Lara. Cultivar-related branch architecture was determined. Lara tended to branch more densely than Franquette (53 vs. 42%). Significantly more fruiting offspring shoots (FO) than vegetative ones (VO) grew-out per 1Y in both cultivars, whereas the ratio FO/VO of Lara exceeded that of Franquette by four times. An acrotonic branching pattern was more strongly expressed in Lara compared to Franquette. Bud-derived IAA was influenced by the cultivar (Franquette had 3.6 times more cumulative IAA along the 1Y than Lara), and by the relative position (terminal, subterminal, medial and basal) of the buds along 1Y. An opposite relationship between branching density and cumulative IAA content was established in both cultivars. At the 1Y relative position level, the opposite ratio between branching density and IAA content was clearly shown only on the basal position of the bud along 1Y in the Lara cultivar. Such an inconsistent linkage between bud production and the IAA spatial distribution along the 1Y illustrated that hormonal factors probably weakly affect the branching of Franquette and Lara. The length of the parent 1Y, the position of the buds along the 1Y-length, and the fate of the buds seemed to have a stronger influence on the bud out-growth and further development of the off-springs. In further analyses, seasonal fluctuations of the IAA, and the following activity of the buds should be investigated in order to improve the understanding of a complex branching phenomenon in walnut.

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“…Terminal bearer Franquette had longer 1Y with more nodes than the lateral bearer Lara, confirming the previous results (Solar and Š tampar 2003;Solar et al 2006).…”

Section: Discussionsupporting

confidence: 90%

Branching of annual shoots in common walnut (Juglans regia L.) as affected by bud production and indol-3-acetic acid (IAA) content

Solar

Osterc

Štampar

et al. 2011

Trees

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“…Tubex represented a positive exception, producing seedlings with a lower branch component despite greater shoot system development. In walnut, the tendency not to develop axillary shoots during the first year (Solar & Štampar 2003) was confirmed regardless of pot size.…”

Section: Discussionmentioning

confidence: 84%

“…In J. regia, the growth pattern is mainly monocyclic (i.e. shoot elongation comprising one growth flush) (Solar & Štampar 2003), and the occurrence of further flushes is rare and generally characteristic of adult stages (Sabatier & Barthelemy 2001;Solar & Štampar 2003). Thus, walnut growth rate stopped earlier during nursery cultivation and seedlings showed an occasional second flush only in Air-pots.…”

Section: Discussionmentioning

confidence: 99%

Container effects on growth and biomass allocation inQuercus roburandJuglans regiaseedlings

Mariotti

Maltoni

Jacobs

et al. 2015

Scandinavian Journal of Forest Research

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Container size and shape impacts biomass allocation of nursery seedlings. Effects of different pot types on shoot and root growth and biomass allocation were evaluated in nursery cultivation of Quercus robur L. and Juglans regia L. We compared two containers currently used in Italian forest nurseries (ISSA-pot®; Plastecnic®) and two alternative types (Superoots Air-pot®; Tubex®); different pot sizes were also included: two for ISSA-pot and Plastecnic; four for Air-pot. Seedlings were evaluated during 1-year nursery growth and biomass allocation was determined on a sub-sample at the end of the growing season. For both species, seedlings grown in larger containers generally grew more and containers >4.5 l produced the largest seedlings. Root biomass was >50% of total biomass in all containers with the tap-root comprising the major root system component. Air pruning in the Air-pots inhibited seedling growth of both species in narrow deep pots, while in bigger sizes (wide and deep) it produced positive responses, especially for walnut. Container configuration differentially affected the studied species: shoot and root system development of walnut seedlings was more limited by pot diameter than depth. Q. robur had improved shoot and root system development when grown in Tubex.

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“…The lateral bearing habit is one of the most important traits in walnut breeding programmes (Germain 1997;Solar et al 2003). This habit makes a genotype more productive in terms of yield capacity.…”

Section: Phenological and Flowering Traitsmentioning

confidence: 99%

“…Walnut genotype evaluation has previously been conducted in many countries throughout the world (Sen & Tekintas 1992;Nicese et al 1998;Sharma & Sharma 1998,2001Kazankaya et al 2001;Yarilgac et al 2001;Solar & Stampar 2003;Acka & ozungun 2004;Asadian & Pieber 2005;Zenli et al 2005). In Iran, the first extensive studies were initiated by Atefi in 1984(Atefi 1993.…”

Section: Introductionmentioning

confidence: 99%

Morphological variation among Persian walnut (Juglans regia) genotypes from central Iran

Arzani¹,

Mansouri‐Ardakan

Vezvaei

et al. 2008

New Zealand Journal of Crop and Horticultural Science

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Fifty-eight mature Persian walnut (Juglans regia) seedlings growing at six sites in the mountainous regions of Taft, in central Iran, were evaluated to determine their morphological variation and to identify promising individuals. The traits investigated included phenological characteristics, such as budbreak and nut maturity time, and nut characteristics, such as nut and kernel weight, kernel ratio, and shell thickness. Yield efficiency and fruitbearing habit were also investigated. The average fruit characteristics: nut weight, kernel weight, kernel ratio, and shell thickness were in the range of 6.0-15.2 g, 2.6-9.1 g, 38.4-79.6%, and 0.4-1.4 mm, respectively. The promising genotypes were AA 33 thickness (0.67), kernel weight (0.75), and shell thickness (0.32); whereas a negative correlation was detected between shell thickness and kernel ratio (-0.34). The data correlation matrix was subjected to principal component analysis, a technique that reduced the dimensionality of the data set and revealed the dominating variables. Cluster analysis of the selected genotypes detected three cluster groups. However, no significant relationship was found between morphological diversity and site geography. The promising selected genotypes identified in central Iran will be further exploited by walnut breeding programmes for their tree and nut characteristics.

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Genotypic Differences in Branching Pattern and Fruiting Habit in Common Walnut (Juglans regia L.)

Cited by 38 publications

References 16 publications

Branching of annual shoots in common walnut (Juglans regia L.) as affected by bud production and indol-3-acetic acid (IAA) content

Branching of annual shoots in common walnut (Juglans regia L.) as affected by bud production and indol-3-acetic acid (IAA) content

Container effects on growth and biomass allocation inQuercus roburandJuglans regiaseedlings

Morphological variation among Persian walnut (Juglans regia) genotypes from central Iran

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