PubMed Health⌕ Search
Home/Archive/PubMed

PubMed · 12011179

Thirty polymorphic nuclear microsatellite loci from black walnut.

K Woeste·R Burns·O Rhodes·C Michler
View original source ↗Export metadata ↓

Abstract

Black walnut (Juglans nigra L) is a large tree, native to the eastern United States, that is prized for its high-quality timber and edible nut. Thirty (GA/CT)n nuclear microsatellite markers were identified from black walnut for use in population genetic studies, genome mapping, DNA genotyping of important clones, studies of gene flow, and tree breeding. The markers were polymorphic based on a diversity panel of 10 black walnut individuals from eight Midwestern U.S. states.

Explore related subjects

JuglandaceaeMicrosatellite RepeatsPolymorphism, GeneticJournal Article

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

K Woeste, R Burns, O Rhodes, C Michler. Thirty polymorphic nuclear microsatellite loci from black walnut.. https://doi.org/10.1093/jhered%2F93.1.58

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

PubMed2006

[Study on chemical constituents of Cyclocarya paliurus].

Phytochemical investigation of chemical constituents of the CHCl3 fraction of 75% alcohol extract from the leaves of Cyclocarya paliurus has resulted in the isolation of five compounds, alpha-boswellic (I), beta-boswellic (II), Oleanolic acid (III), 4-hydroxyl-3-methoxyl-benzoic acid (IV) and 3,6,3',5'-tetramenthox-5,7,4'-trihydroxy-flavonol (V). Their structures were elucidated on the basis of spectroscopic analyses, especially NMR. Compunds I, II, IV and V were obtained from this plant for the first time.

Juglandaceae↗
PubMed2005

[Studies on the triterpenoids of Cyclocarya paliurus (Batal.) Iljinsk].

Three triterpenes (I-II) were obtained from the leaves of Cyclocarya paliurus (Batal.) Iljinsk. By means of physicochemical and spectral methods, the structures of the three triterpenes were identified as oleanolic acid (I), ursolic acid (II) and epikatonic acid (III) respectively. All of the three triterpenes were isolated for the first time from the plant of Cyclocarya paliurus (Batal.) Iljinsk.

Juglandaceae↗
PubMed2001

Seasonal variation in xylem pressure of walnut trees: root and stem pressures.

Measurements of air and soil temperatures and xylem pressure were made on 17-year-old orchard trees and on 5-year-old potted trees of walnut (Juglans regia L.). Cooling chambers were used to determine the relationships between temperature and sugar concentration ([glucose] + [fructose] + [sucrose], GFS) and seasonal changes in xylem pressure development. Pressure transducers were attached to twigs of intact plants, root stumps and excised shoots while the potted trees were subjected to various temperature regimes in autumn, winter and spring. Osmolarity and GFS of the xylem sap (apoplast) were measured before and after cooling or warming treatments. In autumn and spring, xylem pressures of up to 160 kPa were closely correlated with soil temperature but were not correlated with GFS in xylem sap. High root pressures were associated with uptake of mineral nutrients from soil, especially nitrate. In autumn and spring, xylem pressures were detected in root stumps as well as in intact plants, but not in excised stems. In contrast, in winter, 83% of the xylem sap osmolarity in both excised stems and intact plants could be accounted for by GFS, and both GFS and osmolarity were inversely proportional to temperature. Plants kept at 1.5 degrees C developed positive xylem pressures up to 35 kPa, xylem sap osmolarities up to 260 mosmol l(-1) and GFS concentrations up to 70 g l(-1). Autumn and spring xylem pressures, which appeared to be of root origin, were about 55% of the theoretical pressures predicted by osmolarity of the xylem sap. In contrast, winter pressures appeared to be of stem origin and were only 7% of the theoretical pressures, perhaps because of a lower stem water content during winter.

Juglandaceae↗