Skip Navigation



AOBPreview published online on June 26, 2003
Annals of Botany, doi:10.1093/aob/mcg137
© 2003 by Annals of Botany Company
This Article
Right arrow FREE Full Text (PDF) Freely available
Right arrow All Versions of this Article:
92/2/317    most recent
mcg137v1
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by SOLAR, A.
Right arrow Articles by STAMPAR, F.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by SOLAR, A.
Right arrow Articles by STAMPAR, F.
Agricola
Right arrow Articles by SOLAR, A.
Right arrow Articles by STAMPAR, F.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

Submitted on January 8, 2003
Revised on March 31, 2003
Accepted on May 7, 2003

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

ANITA SOLAR1* and FRANCI STAMPAR1

Affiliation of the authors: 1 University of Ljubljana, Biotechnical Faculty, Agronomy Department, Jamnikarjeva 101, 1111 Ljubljana, Slovenia

* To whom correspondence should be addressed.

Architectural analysis of 840 Slovenian walnut (Juglans regia L.) genotypes was performed to determine the most typical and frequent morphological types and to evaluate their vegetative and generative potential. Four branching and fruiting patterns (I-IV) were detected. A 3-year-old fruiting branch, consisting of a 3-year-old shoot plus corresponding 2-year-old and 1-year-old shoots, was used as a structural unit for quantitative analysis. In the intermediate fruit-bearing types with mesotonic and acrotonic branching pattern (types II and III), the total lengths of 3-, 2- and 1-year-old shoots were 385 and 380 cm, respectively, compared with 275 and 253 cm in the terminal and lateral-fruiting types (types I and IV). In type I, 1-year-old shoots had significantly fewer nodes than in other types. In addition, they had a thinner basal diameter than types III and IV, and their angles were the most erect (39°). Only 0·4 out of 3·6 1-year-old shoots were flowering with one mixed bud with 1·9 female flowers. In type IV, 2-year-old shoots had significantly more nodes and a larger basal diameter than other types. One-year-old shoots in type IV are thicker than those in other types. Ratios between the number of flowering and the total number of 1-year-old shoots were 0·7 in type IV, 0·6 in type III, 0·5 in type II and 0·1 in type I. On 1-year-old shoots in type IV, 1·7 mixed buds with a mean of three female inflorescences per bud were counted. Consequently, the generative potential is highest in type IV and lowest in type I. In types II and III, growth and the ability to bear fruits are more balanced.
Key words: Juglans regia, walnut, genotypic variation, architectural analysis, fruiting branch, generative and vegetative potential.


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?




Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.