each tree was preserved in silica gel and taken to the laboratory for storage at −80 °C until DNA extraction and molecular marker analyses. Fig. 1. Nut morphology of Juglans cathayensis , Juglans regia , and putative hybrid. Grooves of the putative
The family Juglandaceae consists of seven genera, comprising ≈60 monoecious tree species. The genus Juglans contains 20 species, all producing edible nuts. Among these, the English or Persian walnut ( Juglans regia ) is the most widely cultivated
English (or persian) walnut ( Juglans regia ) is an economically important tree species throughout temperate regions of the world as a result of its nutrient-rich nut and high-quality timber. China is considered one of the most important countries
. oxysporum Fo47 Physiol. Mol. Plant Pathol. 73 9 15 Aleta, N. Ninot, A. Moragrega, C. Liorente, I. Montesinos, E. 2001 Blight sensitivity of Spanish selections of Juglans regia Acta Hort. 544 353 362 Alexander, D. Goodman, R.M. Gut-Rella, M. Glascock, C
modification. Materials and Methods Source of somatic embryos and culture conditions. SEs of Persian walnut ( Juglans regia L.) were regenerated from immature walnut catkins of the cultivar Chandler ( Mendum and McGranahan, 1995 ). This embryogenic line had
. Fikri, B. Peyami, B. 2010 Endogenous hormone levels in bearing and non-bearing shoots of walnut ( Juglans regia L.) and their mutual relationships Acta Physiol. Plant. 32 53 57 10.1007/s11738-009-0376-2 Gälweiler, L. Guan, C.H. Müller, A. Wisman, E
The effect of kaolin (Surround™) on walnut quality parameters, including edible yield, reflected light index, insect damage, off grade, price per pound, and the incidence and severity of sunburn, were evaluated over a 4-year period in `Vina' and `Chandler' walnut orchards. Results indicate that applications of kaolin significantly improved edible yield, reflected light index, price per pound, and the incidence and severity of sunburn in most orchards in most years. Improvements in these parameters were more consistent with the `Vina' cultivar. Off-grade was not significantly reduced by the use of kaolin. Codling moth damage levels were too low to detect in all orchards in all years.
A new vapor phase hydrogen peroxide (VPHP) technology that uses relatively dry hydrogen peroxide pulses is a promising method for the disinfection of surface-borne bacteria, yeasts, and molds on walnut nutmeats. The number of colony forming units per gram (cfu/g) on untreated nutmeats was compared to those VPHP treated. Three culture media; dichloran rose bengal chloramphenicol agar base (DRBC, Oxoid), aerobic plate count agar (APC, Oxoid), and potato dextrose agar (PDA, Sigma), were utilized to evaluate cfu/g. Similar numbers of cfu/g of product were observed on APC and PDA. The more selective DRBC had lower cfu/g. Microorganisms washed from untreated walnut nutmeats purchased at retail outlets ranged between 17,000-29,000 cfu/g depending upon the culture medium used. The number of cfu/lg on nutmeats after VPHP treatments was reduced to 500-1400, a 95% reduction. VPHP may offer an alternative to propylene oxide fumigation. The moisture content of nutmeats was not significantly altered by VPHP. The Food and Drug Administration lists hydrogen peroxide as a “generally recognized as safe substance” (GRAS). Hydrogen peroxide is already produced in a food grade for aseptic packaging.
antibody to carboxyl-linked indoleacetic acid Plant Physiol. 96 1076 1078 Li, Y.T. Zhao, Y.G. Yang, K.Q. Fang, Y.Y. Hou, L.Q. 2011 Studies on floral organ development process of precocious walnut ( juglans regia ) by anatomia Acta Hort. Sinica 38 434 440
Armillaria root disease affects orchards in all Juglans regia (Persian walnut)-growing regions of California ( Gardner and Raabe, 1963 ). The causal agent is Armillaria mellea (Basidiomycota, Physalacriaceae), which attacks walnut and other