Effects of different seedling rootstock sources on vegetative and reproductive characteristics of several walnut cultivars/genotypes

Document Type : Original Article

Author

Assistant Professor, Agronomy and Horticulture Research Ddepartment, , Center of Research in Agriculture and Natural Resource and Education, West Azarbaijan, Urmia, Iran.

10.30466/rip.2025.55572.1329

Abstract

Seed germination percentage, growth vigor, and uniformity of seedling growth, as well as their effects on graft take and vegetative and reproductive growth of walnut, are important for nursery producers and orchard growers. In this study, seed germination percentage and traits related to vegetative growth of seedlings derived from five seed sources with different growth vigor and fruiting characteristics, including seeds from dwarf trees (DW2), low-vigor trees (KZ8), medium-vigor trees (KZ13), relatively vigorous trees (OR126), and vigorous wild trees (Souzani), as well as the effects of these rootstocks on graft take percentage, vegetative growth, leaf nitrogen concentration, leafing time, and fruiting of three walnut cultivars/genotypes, including ‘Chandler’, ‘Jamal’, and KZ15, were evaluated in a split-plot arrangement within a randomized complete block design during 1390–1395. The results showed variation in germination percentage, growth vigor, and rooting among the seed sources studied. Germination percentage varied from 20 to 78% among the genotypes. Walnut seedling rootstocks significantly affected graft take percentage, seedling height and trunk diameter growth, leaf area, and nitrogen uptake. Cultivar also had significant effects on many of the traits. The interaction between rootstock and cultivar was significant for all traits except internode number, internode length, and leaf nitrogen content. Overall, the growth parameters of walnut cultivars were higher on vigorous rootstocks than on weak rootstocks.

Keywords

References

تاج­آبادی­پور، ع. و پناهی، ب. 1382. اثرات متقابل پایه­های بذری پسته اهلی (بادامی ریز)، سرخس، بنه و آتلانتیکا روی سه رقم تجاری پسته، سومین کنگره باغبانی ایران.
خوش­قلب، ح.، ارزانی، ک. و کریم­زاده، ق. 1382. بر همکنش اثرات پایه و پیوندک در تعیین اندازه درخت در ارقام گلابی آسیایی، سومین کنگره باغبانی ایران.
رضایی، ر. 1386. تأثیر قدرت رشد بر ریشه­ زایی و گیرایی پیوند گردو. رساله دکتری تخصصی، دانشگاه تبریز.
کیانی، ب. 1383. ژنتیک جنگل (توسعه درخت و جنگل)، انتشارات حق ­شناس. 214 ص.
گریگوریان، و. 1381. فیزیولوژی پیوند و روش­های پیوندزنی، انتشارات انجمن علوم باغبانی ایران، عمیدی. 372 ص.
مداح ­عارفی، ح.، امانی، م. و جعفری، ع. 1382. انتخاب شاخص­های اصلاح ژنتیکی چوب گردوی ایرانی، خلاصه مقالات اولین همایش تخصصی گردوی کشور، همدان.
وحدتی، ک. 1382. احداث خزانه وپیوند گردو. انتشارات خانیران. 128 ص.
Devin, S.R. and Bujdoso, G. 2022. Walnut genotypes for high density orchards. Horticulturae, 8(6): 490.
Faust, M .1989. Physiology of temprate zone fruit trees. John Willy and Sons, Inc.
Forde, H.I. McGranahan, G.H. 1996. Walnuts. In: Fruit Breeding, Volume III: Nuts, J. Janick and J.N.Moore (eds.). John Wiley and Sons, Inc.
Germain, E., Delort, F., Kanivets, V., Kanivets, V., 1995. Precocious maturing walnut population orignating from central Asia: thier behaviour in France. In III International Walnut Congress, 442: 83-90.
Grant, J.A. and McGranahan, G.H. 2005. English walnut rootstocks help avoid blackline disease, but produce less than ‘Paradox’hybrid. California Agriculture, 59(4): 249 -251.
Hartmann, H.T., Kester, D.E. and Davies, F.T. 1990, Plant propagation: principles and practices, Prentice-Hall, Englewood Cliffs, New Jersey, USA. pp.647.
Jaumien, F. and Faust, M. 1983. Stem anatomical structure of Delicious and Golden Delicious apple hybrids with various growth dynamics. In International Workshop on Controlling Vigor in Fruit Trees, 146: 69-82.
Kuniyuki, A.H. and Forde, H.I. 1985. Walnut propagation. Walnut orchard management, pp.38-45.
McGranahan, G.H. and Forde, H.I. 1985, Genetic improvement, In: Walnut orchard management (Ed: D.E. Ramos), California, USA. pp. 8-11.
Rezaee, R., Vahdati, K. and Valizadeh, M. 2009. Variability of seedling vigour in Persian walnut as influenced by the vigour and bearing habit of the mother tree. The Journal of Horticultural Science and Biotechnology, 84(2): 228-232.
Wilson, B.C., McKenna, J.R., Jacobs, D.F. and Woeste, K.E. 2004, November. Stock quality of black walnut (Juglans nigra) seedlings as affected by half-sib seed source and nursery sowing density. In V International Walnut Symposium, 705: 375-381.
Research in Pomology
Volume 10, Issue 1
September 2025
Pages 159-170

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