scholarly journals REPORT ON POPLAR HYBRIDIZATION II 1937 AND 1938

1940 ◽  
Vol 16 (2) ◽  
pp. 149-160 ◽  
Author(s):  
C. Heimburger

The results of further progress in a poplar hybridization project initiated in 1935 with the aim of producing valuable hardy and disease resistant material of rapid growth for the production of wood of high quality for industrial purposes, and of value for shelterbelts in the Prairies are reported. It has been possible to cross the native aspens of Eastern and Western Canada with several exotic aspens and their hybrids with silver poplar, and to obtain hybrid material of great promise for these purposes. Some western balsam poplars have also been crossed with exotic species and have yielded hybrids of promise for shelterbelts. An attempt to cross an aspen with a cottonwood has so far yielded indifferent results. The cross of a basket willow with a cottonwood was not successful. Hardiness, disease resistance, and good propagability from stem or root cuttings are at present the most important characters used in evaluating the young hybrids.

2018 ◽  
Vol 98 (5) ◽  
pp. 1203-1211 ◽  
Author(s):  
W.G. Legge ◽  
A. Badea ◽  
J.R. Tucker ◽  
T.G. Fetch ◽  
M. Banik ◽  
...  

AAC Goldman is a hulled, two-row, spring, malting barley (Hordeum vulgare L.) cultivar widely adapted to western Canada. It was developed from the cross TR04282/Newdale made in 2002 and was evaluated in the Western Cooperative Two-row Barley Registration Test (2010–2011) as well as the Collaborative Malting Barley Trials (2011–2012) conducted by the malting and brewing industry before being registered in 2018. AAC Goldman has a desirable combination of agronomic, malting quality, and disease resistance traits including low deoxynivalenol content.


1995 ◽  
Vol 32 (3) ◽  
pp. 339-348 ◽  
Author(s):  
M. B. Green ◽  
J. Upton

Reed bed treatment is put in the context of a major water company’s need to provide reliable, high quality, effluents from small sewage treatment works whilst seeking to minimise running costs. Design and operational information is given for reed bed applications in Severn Trent Water. Performance details are provided for application to secondary, tertiary and storm overflow treatment. The results give particular confidence in the system’s ability to deliver very high quality effluents when used for tertiary treatment, the company’s biggest application. Reed beds work well against less demanding criteria for secondary treatment at small sites and show great promise for storm overflow treatment.


RSC Advances ◽  
2015 ◽  
Vol 5 (16) ◽  
pp. 12463-12471 ◽  
Author(s):  
Roozbeh Javad Kalbasi ◽  
Ali Zirakbash

PHEMA/KIT-5 with various pore sizes was prepared. Efficient encapsulation of drug molecules inside the pores of the hybrid material and controlled release of them in an aqueous medium, suggest the great promise of the composite as a carrier system.


2015 ◽  
Vol 47 (2) ◽  
pp. 166-172
Author(s):  
Im-Soo Choi ◽  
Young-Chan Cho ◽  
Yong-Jae Won ◽  
Myeong-Ki Kim ◽  
Jeom-Ho Lee ◽  
...  

2021 ◽  
Vol 28 ◽  
Author(s):  
Aqsa Parvaiz ◽  
Ghulam Mustafa ◽  
Muhammad Sarwar Khan ◽  
Muhammad Amjad Ali

Background: Resistance Gene Analogues (RGAs) are an important source of disease resistance in crop plants and have been extensively studies for their identification, tagging and mapping of Quantitative Trait Loci (QTLs). Tracking these RGAs in sugarcane can be of great help for the selection and screening of disease resistant clones. Objective: In the present study expression of different Resistance Gene Analogues (RGAs) was assessed in indigenous elite sugarcane genotypes which include resistant, highly resistant, susceptible and highly susceptible to disease infestation. Methods: Total cellular DNA and RNA were isolated from fourteen indigenous elite sugarcane genotypes. PCR, semi-quantitative RT PCR and real time qPCR analyses were performed. The resultant amplicons were sequence characterized, chromosomal localization and phylogenetic analysis were performed. Result: All of the 15 RGA primers resulted in amplification of single or multiple fragments from genomic DNA whereas only five RGA primers resulted in amplification from cDNA. Sequence characterization of amplified fragments revealed 86-99% similarity with disease resistance proteins indicating their potential role in disease resistance response. Phylogenetic analysis also validated these findings. Further, expression of RGA-012, RGA-087, RGA-118, RGA-533 and RGA-542 appeared to be upregulated and down regulated in disease resistant and susceptible genotypes, respectively, after inoculation with Colletotrichum falcatum. Conclusion: RGAs are present in most of our indigenous genotypes. Anyhow, differential expression of five RGAs indicated that they have some critical role in disease resistance. So, the retrieved results can not only be employed to devise molecular markers for the screening of disease resistant genotypes but can also be used to develop disease resistant plants through transgenic technology.


Author(s):  
Deborah Schenberger

Spinal fusion is the latest application of electrical stimulation as a fracture healing. This exciting new application has been proven over 30 years of use, and the market is now poised for rapid growth. Patent activity shows an increased interest in this technology, and both start-up companies and orthopedic giants can thus benefit from introducing new products in this field.


Science ◽  
2020 ◽  
Vol 367 (6480) ◽  
pp. 903-906 ◽  
Author(s):  
Fang Liu ◽  
Wenjing Wu ◽  
Yusong Bai ◽  
Sang Hoon Chae ◽  
Qiuyang Li ◽  
...  

Two-dimensional materials from layered van der Waals (vdW) crystals hold great promise for electronic, optoelectronic, and quantum devices, but technological implementation will be hampered by the lack of high-throughput techniques for exfoliating single-crystal monolayers with sufficient size and high quality. Here, we report a facile method to disassemble vdW single crystals layer by layer into monolayers with near-unity yield and with dimensions limited only by bulk crystal sizes. The macroscopic monolayers are comparable in quality to microscopic monolayers from conventional Scotch tape exfoliation. The monolayers can be assembled into macroscopic artificial structures, including transition metal dichalcogenide multilayers with broken inversion symmetry and substantially enhanced nonlinear optical response. This approach takes us one step closer to mass production of macroscopic monolayers and bulk-like artificial materials with controllable properties.


2000 ◽  
Vol 80 (4) ◽  
pp. 835-836 ◽  
Author(s):  
G. R. Stringam ◽  
D. F. Degenhardt ◽  
M. R. Thiagarajah ◽  
V. K. Bansal

Hi-Q is a canola quality Brassica napus cultivar adapted to the canola growing areas in western Canada. It has high seed yield, high oil and meal protein content, good lodging resistance, and excellent resistance to blackleg disease. It is superior in all these traits to the average of AC Excel, Defender and Legacy. Key words: Rape (summer), cultivar description, yield, blackleg resistant, lodging, resistant high quality


2007 ◽  
Vol 104 (18) ◽  
pp. 7477-7482 ◽  
Author(s):  
Roxanne Karimi ◽  
Celia Y. Chen ◽  
Paul C. Pickhardt ◽  
Nicholas S. Fisher ◽  
Carol L. Folt

Rapid growth could significantly reduce methylmercury (MeHg) concentrations in aquatic organisms by causing a greater than proportional gain in biomass relative to MeHg (somatic growth dilution). We hypothesized that rapid growth from the consumption of high-quality algae, defined by algal nutrient stoichiometry, reduces MeHg concentrations in zooplankton, a major source of MeHg for lake fish. Using a MeHg radiotracer, we measured changes in MeHg concentrations, growth and ingestion rates in juvenile Daphnia pulex fed either high (C:P = 139) or low-quality (C:P = 1317) algae (Ankistrodesmus falcatus) for 5 d. We estimated Daphnia steady-state MeHg concentrations, using a biokinetic model parameterized with experimental rates. Daphnia MeHg assimilation efficiencies (≈95%) and release rates (0.04 d−1) were unaffected by algal nutrient quality. However, Daphnia growth rate was 3.5 times greater when fed high-quality algae, resulting in pronounced somatic growth dilution. Steady-state MeHg concentrations in Daphnia that consumed high-quality algae were one-third those of Daphnia that consumed low-quality algae due to higher growth and slightly lower ingestion rates. Our findings show that rapid growth from high-quality food consumption can significantly reduce the accumulation and trophic transfer of MeHg in freshwater food webs.


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