Chromosomal Location of Traits Associated with Wheat Seedling Water and Phosphorus Use Efficiency under Different Water and Phosphorus Stresses

The objective of this study was to locate chromosomes for improving water and phosphorus-deficiency tolerance of wheat at the seedling stage. A set of Chinese Spring-Egyptian Red wheat substitution lines and their parent Chinese Spring (recipient) and Egyptian Red (donor) cultivars were measured to determine the chromosomal locations of genes controlling water use efficiency (WUE) and phosphorus use efficiency (PUE) under different water and phosphorus conditions. The results underlined that chromosomes 1A, 7A, 7B, and 3A showed higher leaf water use efficiency (WUEl = Pn/Tr; Pn = photosynthetic rate; Tr = transpiration rate) under W-P (Hoagland solution with 1/2P), -W-P (Hoagland solution with 1/2P and 10% PEG). Chromosomes 7A, 3D, 2B, 3B, and 4B may carry genes for positive effects on individual plant water use efficiency (WUEp = biomass/TWC; TWC = total water consumption) under WP (Hoagland solution), W-P and -W-P treatment. Chromosomes 7A and 7D carry genes for PUE enhancement under WP, -WP (Hoagland solution with 10% PEG) and W-P treatment. Chromosome 7A possibly has genes for controlling WUE and PUE simultaneously, which indicates that WUE and PUE may share the same genetic background. Phenotypic and genetic analysis of the investigated traits showed that photosynthetic rate (Pn) and transpiration rate (Tr), Tr and WUEl showed significant positive and negative correlations under WP, W-P, -WP and -W-P, W-P, -WP treatments, respectively. Dry mass (DM), WUEP, PUT (phosphorus uptake) all showed significant positive correlation under WP, W-P and -WP treatment. PUE and phosphorus uptake (PUT = P uptake per plant) showed significant negative correlation under the four treatments. The results might provide useful information for improving WUE and PUE in wheat genetics

Nos Disparus - W. Wesley Pue

In April 2019, the Allard School of Law lost one of its most enthusiastic, innovative and generous scholars when Professor W. Wesley Pue passed away after liv- ing courageously with cancer for four years. His con- tributions to the law school and the University of British Columbia over 25 years of dedicated service were many and his impact profound

Nitrogen effects on water use efficiency in the semi-arid Canadian prairies

Non-Peer ReviewedIn the semiarid environment of the Canadian prairies, water is the main constraint to crop production. Few studies have examined the influence of fertilizer on water use efficiency (WUE) and fewer still have made comparisons on a cropping system basis. We assessed the impact of fertilizer N on WUE in a 39-year crop rotation experiment conducted on a Brown Chernozemic soil at Swift Current, Saskatchewan. The cropping systems included continuous wheat (Cont W) with N+P and P fertilizer alone, and a fallow-wheat-wheat (F-W-W) system with N+P and P only. All cropping systems were managed using conventional tillage practices. We developed an equation to asses WUE of the cropping systems that included water use during the fallow year. We also calculated precipitation use efficiency (PUE, i.e., yield/harvest-to-harvest precipitation). WUE and PUE values and fertilizer effects were greatest in the later third of the study period, due to the increase in recommended fertilizer N rates applied and the more favorable moisture conditions that prevailed. We converted PUE results into net return values ($ha-1 mm-1 water) by assuming an average price over the 39-yr period and found that N fertilizer in the Cont W system earned an average return above fertilizer cost of$36.39 ha-1 yr-1 and $9.81 ha-1 yr-1in the F-W-W system

Water use efficiency and precipitation use efficiency of crops in the semiarid prairie

Non-Peer ReviewedThe importance of water use efficiency (WUE) in crop production, in the semiarid prairie, is based on the fact that the available water is the most limiting factor influencing crop production. This poster compares water use efficiency of four crop rotations from the Swift Current, SK, long-term rotation experiment: fallow-wheat-wheat (F-W-W), F-flax-W (F-Flx-W), continuous wheat (Cont W) and wheat-lentil (W-Lent). We found that, the WUE of flax and lentil averaged 50% and 64%, respectively, of wheat following wheat. The precipitation required per unit of produce from the complete cropping system (PUE) increased with cropping intensity on a yield basis (kg ha-1 mm-1): Cont W (4.8) > W-Lent (4.2) > F-W-W (4.1) > F-Flx-W (2.9) (opposite response to WUE) and when PUE was calculated on a dollars produced per rotation basis ($ ha-1 mm-1): W-Lent (1.0) was higher than the other two rotations (0.6 to 0.7)

Plutonium 239 Equivalency Calculations

This document provides the basis for converting actual weapons grade plutonium mass to a plutonium equivalency (PuE) mass of Plutonium 239. The conversion can be accomplished by performing calculations utilizing either: (1) Isotopic conversions factors (CF{sub isotope}), or (2) 30-year-old weapons grade conversion factor (CF{sub 30 yr}) Both of these methods are provided in this document. Material mass and isotopic data are needed to calculate PuE using the isotopic conversion factors, which will provide the actual PuE value at the time of calculation. PuE is the summation of the isotopic masses times their associated isotopic conversion factors for plutonium 239. Isotopic conversion factors are calculated by a normalized equation, relative to Plutonium 239, of specific activity (SA) and cumulated dose inhalation affects based on 50-yr committed effective dose equivalent (CEDE). The isotopic conversion factors for converting weapons grade plutonium to PuE are provided in Table-1. The unit for specific activity (SA) is curies per gram (Ci/g) and the isotopic SA values come from reference [1]. The cumulated dose inhalation effect values in units of rem/Ci are based on 50-yr committed effective dose equivalent (CEDE). A person irradiated by gamma radiation outside the body will receive a dose only during the period of irradiation. However, following an intake by inhalation, some radionuclides persist in the body and irradiate the various tissues for many years. There are three groups CEDE data representing lengths of time of 0.5 (D), 50 (W) and 500 (Y) days, which are in reference [2]. The CEDE values in the (W) group demonstrates the highest dose equivalent value; therefore they are used for the calculation

Cultural Projects and Structural Transformation in the Legal Profession

This paper explores the history of professional formation amongst lawyers, pointing to the surprising conclusions that contemporary legal professionalism bears little continuity with supposed roots in British professionalism and that one of the major motors driving professionalism was related to a project of cultural transformation in state and society at large. Whilst legal professions appear exclusionary and xenophobic from an outside perspective, the desire to control difference has deeper, more fully cultural roots, than arguments from self-interest per se might suggest

Banned from Lawyering: Gordon Martin, Communist

This paper assesses the exclusion of Gordon Martin from the practice of law in 1948 solely on the grounds that his communist political commitment was inconsistent with the role of a lawyer. In so doing it canvasses understandings of the day regarding communism, constitutionalism, and American social thought (as embodied in Oliver Wendell Holmes, John Dewey, Charles Beard, James Harvey Robinson, and Thorstein Veblen). Issues relating to self-governance of the legal profession, character, and statutory interpretation under then-current administrative law doctrine are reviewed

A History of British Columbia Legal Education

This paper explores the history of legal education in twentieth century British Columbia. The period covers the transition from qualification by apprenticeship to the foundation of Canada\u27s first post-WWII Faculty of Law - the beginning of modern legal education in Canada. Issues addressed include the moral vision of legal education, gender and the legal profession (the admission of women lawyers), race-based exclusions, the question of whether communists could be qualified as lawyers, and the evolution of legal curriculum from the age of moral reform to the era of narrowly technocratic notions of legal knowledge

In Pursuit of Better Myth: Lawyers\u27 Histories and Histories of Lawyers

This paper explores the mythologies contemporary lawyers generate in defence of existing professional structures. Drawing on the history of legal professions, the paper engages critically with professional apologetics, from a perspective influenced by diverse contemporary writings on legal professions including those associated with Richard Abel, Terrence Halliday, and others

The Prime Minister\u27s Police? Commissioner Hughes\u27 APEC Report

On 31 July 2001, a distinguished Canadian jurist reported on matters of unusual significance. Sitting as a Member of the Commission for Public Complaints Against the RCMP (CPC), Mr. Justice E.N. Hughes dealt with matters that go to the heart of liberal democracy. Any investigation of alleged police misconduct is important, of course, to a country that wishes to be governed in accordance with fundamental principles of the rule of law. This is so even in the seemingly most inconsequential instances. Important principles are involved even where small matters are concerned. The matters before Commissioner Hughes on this occasion however raise a number of large issues that only rarely come before formal inquiries. The matter known in Canada as the APEC affair, and Commissioner Hughes\u27 APEC report ( Hughes Report ) focus on allegations of wrongdoing by the police and the Prime Minister of Canada at the Asia Pacific Economic Co-operation (APEC) Conference held in Vancouver in November 1997. The particular allegations, which have dominated the House of Commons and Canadian political life on several occasions, will be addressed in a moment. First, however, it is worth pausing briefly to consider some fundamental principles concerning police and politicians