Evaluation of resistance of selected cucumber lines to angular leaf spot (Pseudomonas syringae pv. lachrymans)

Angular leaf spot caused by bacteria Pseudomonas syringae pv. lachrymans is a very common cucumber disease, which causes serious yield losses. The objective of this study was to examine the selected cucumber lines regarding their resistance to this pathogen. Twelve cucumber lines bred at the Research Institute of Horticulture were evaluated and compared with the resistant inbred line GY 14 and the susceptible cv. ‘Wisconsin SMR 18’. Plants were inoculated under controlled conditions at cotyledon stage (experiment I) and at leaves stage (experiment II) with the highly aggressive strain of P. s. pv. lachrymans BO 1537. Dis-ease severity was scored 8 days after inoculation using a nine-point rating scale (9 – no symptoms or a few pin-point lesions; 1 – damage up to 100% of leaves). Distribution of plants across severity classes and low variation coefficient indi-cate that all evaluated cucumber lines showed rather good uniformity in their re-spective degrees of resistance to this pathogen. All the materials tested presented lower disease severity in cotyledons stage than in leaves stage. It was also noted that greater differentiation among the lines in regard to their resistance to the bacteria was observed in the leaves stage. Two lines PW 2 and PW 7 exhibited the highest resistance against P. s. pv. lachrymans and can serve as a useful source of this trait in future breeding efforts

Evaluation of agronomic values of some cucumber breeding lines

Celem badań była ocena 16 linii hodowlanych pod względem odporności na mączniaka rzekomego, wysokości i jakości plonowania oraz cech morfologicznych owoców. Doświadczenie prowadzono w 2002 roku na polu doświadczalnym Instytutu Warzywnictwa w Skierniewicach. Badane genotypy wykazały bardzo duże zróżnicowanie pod względem wszystkich ocenianych cech. Podatność linii na mączniaka rzekomego określono na podstawie średniego porażenia powierzchni liści w procentach. Stwierdzono statystycznie istotną interakcję dwóch czynników: linii i terminu obserwacji. Oznacza to, że linie reagowały różnym stopniem porażenia w zależności od terminu obserwacji. Najniższą podatnością na tę chorobę odznaczały się linie B 5338 i B 5354. Ich stopień porażenia był stabilny przez cały okres wegetacji. Wysokość plonowania mieściła się w przedziale od 3-50 t·ha⁻¹. Najwyższym plonem ogólnym, handlowym i wczesnym wyróżniły się linie B 5546 i B 5290. Większość linii (75%) charakteryzowała się bardzo dobrą jakością plonu (powyżej 90% plonu handlowego w plonie ogólnym). Na wyróżnienie zasługuje linia B 5354, której plon handlowy był równy plonowi ogólnemu.Sixteen cucumber breeding lines of different origin were evaluated according to some agronomic values (resistance to downy mildew, yielding and fruit quality). The experiment was conducted in 2002 in the field of the Research Institute of Vegetable Crops in Skierniewice. There was a variation in all the traits between tested lines. The level of resistance to downy mildew was evaluated on the basis of the percent of infected leaf area by the pathogen. Significant interactions between lines and terms of observations were evident. The lines reacted in a different level of disease expression at the following terms of assessment. The highest level of resistance to downy mildew, almost immune, was observed in lines B 5338 and B 5354. The total yielding was 3-50 t·ha⁻¹. Lines B 5546 and B 5290 showed the highest total, marketable and early yield. Most of lines (75%) was characterized by a very good yield quality (more than 90% marketable yield in total yield)

Forwards the breeding of male sterile tomato lines with gene ms-10

The aim of the study conducted in 2012-2014 was to evaluate multi-breeding value of the tomato male-sterile lines (gene ms-10). Two (PWS 10, PWS 18) of the five tested lines showed the highest and most stable level of sterility. The good stability of sterility was also found in the two other ms-10 lines (PWS 12, PWS 21), which displayed a low number of fruits with seeds. In the case of the last tested line (PWS 19), regardless of the research year, partially fertile plants were observed. A large variation among tested lines was demonstrated in terms of most analysed agrobotanical traits, as well as the content of basic chemical components and health-enhancing constituents

Coronary-Artery Bypass Surgery in Patients with Ischemic Cardiomyopathy

BACKGROUND: the survival benefit of a strategy of coronary-artery bypass grafting (CABG) added to guideline-directed medical therapy, as compared with medical therapy alone, in patients with coronary artery disease, heart failure, and severe left ventricular systolic dysfunction remains unclear. METHODS: From July 2002 to May 2007, a total of 1212 patients with an ejection fraction of 35% or less and coronary artery disease amenable to CABG were randomly assigned to undergo CABG plus medical therapy (CABG group, 610 patients) or medical therapy alone (medical-therapy group, 602 patients). The primary outcome was death from any cause. Major secondary outcomes included death from cardiovascular causes and death from any cause or hospitalization for cardiovascular causes. The median duration of follow-up, including the current extended-follow-up study, was 9.8 years. RESULTS: A primary outcome event occurred in 359 patients (58.9%) in the CABG group and in 398 patients (66.1%) in the medical-therapy group (hazard ratio with CABG vs. medical therapy, 0.84; 95% confidence interval [CI], 0.73 to 0.97; P=0.02 by log-rank test). A total of 247 patients (40.5%) in the CABG group and 297 patients (49.3%) in the medical-therapy group died from cardiovascular causes (hazard ratio, 0.79; 95% CI, 0.66 to 0.93; P=0.006 by log-rank test). Death from any cause or hospitalization for cardiovascular causes occurred in 467 patients (76.6%) in the CABG group and in 524 patients (87.0%) in the medical-therapy group (hazard ratio, 0.72; 95% CI, 0.64 to 0.82; P<0.001 by log-rank test). CONCLUSIONS: In a cohort of patients with ischemic cardiomyopathy, the rates of death from any cause, death from cardiovascular causes, and death from any cause or hospitalization for cardiovascular causes were significantly lower over 10 years among patients who underwent CABG in addition to receiving medical therapy than among those who received medical therapy alone. (Funded by the National Institutes of Health; STICH [and STICHES] ClinicalTrials.gov number, NCT00023595)