A population Analysis of Juniperus in The Missouri River Basin: Taxonomic Interrelationships Between Juniperus scopulorum Sarg. and J. virginiana L. in Missouri River Basin

Juniper has been used since early pioneer days in the protective tree plantings established on the windswept Great Plains. More recently juniper has been used as a basic component of the shelter belt plantings which, by the thousands, dot the prairies of the Great Plains from Texas to Canada. Research to improve the quality of Plains tree planting materials, including Juniperus) is proposed or is now in progress. In the fall of 1965, 72 native stands of Juniperus were sampled throughout the Missouri River Basin-an area encompassing most of the Central and Northern Great Plains. The purpose was to determine the occurrence and extent of variation in this Juniperus population and to clarify some of the interrelationships between Juniperus scopulorum Sarg. and J. virginiana L., thus establishing a sounder foundation upon which to begin improvement of the planting stock with respect to characteristics desirable in Plains forestry. The study was based on a taxonomic evaluation of 38 gross morphological, foliage, cone and seed, and infrared characters of 675 trees. Separate analyses involved 675 ovulate and staminate trees with 16 characters, 343 ovulate trees with 24 characters, and 142 ovulate trees with 38 characters in common. Frequency distributions of character values, correlation coefficients of all possible character combinations, hybrid indices and percent germ plasm distributions were determined to characterize the population. IBM 7040 and 360 electronic computers were utilized as an aid in the analysis. Analyses suggested the Juniperus population throughout the Missouri River Basin to be of hybrid derivation with neither parental type being found. A strong tendency toward bimodality within the population was demonstrated, however, indicating the presence of two different species-]. scopulorum and J. virginiana. The analyses demonstrated an introgressive trend between southeast and northwest over the Basin from the reported range of J. virginiana into that of J. scopulorum

A population Analysis of Juniperus in The Missouri River Basin: Taxonomic Interrelationships Between Juniperus scopulorum Sarg. and J. virginiana L. in Missouri River Basin

Juniper has been used since early pioneer days in the protective tree plantings established on the windswept Great Plains. More recently juniper has been used as a basic component of the shelter belt plantings which, by the thousands, dot the prairies of the Great Plains from Texas to Canada. Research to improve the quality of Plains tree planting materials, including Juniperus) is proposed or is now in progress. In the fall of 1965, 72 native stands of Juniperus were sampled throughout the Missouri River Basin-an area encompassing most of the Central and Northern Great Plains. The purpose was to determine the occurrence and extent of variation in this Juniperus population and to clarify some of the interrelationships between Juniperus scopulorum Sarg. and J. virginiana L., thus establishing a sounder foundation upon which to begin improvement of the planting stock with respect to characteristics desirable in Plains forestry. The study was based on a taxonomic evaluation of 38 gross morphological, foliage, cone and seed, and infrared characters of 675 trees. Separate analyses involved 675 ovulate and staminate trees with 16 characters, 343 ovulate trees with 24 characters, and 142 ovulate trees with 38 characters in common. Frequency distributions of character values, correlation coefficients of all possible character combinations, hybrid indices and percent germ plasm distributions were determined to characterize the population. IBM 7040 and 360 electronic computers were utilized as an aid in the analysis. Analyses suggested the Juniperus population throughout the Missouri River Basin to be of hybrid derivation with neither parental type being found. A strong tendency toward bimodality within the population was demonstrated, however, indicating the presence of two different species-]. scopulorum and J. virginiana. The analyses demonstrated an introgressive trend between southeast and northwest over the Basin from the reported range of J. virginiana into that of J. scopulorum

Experimental and theoretical study of the gas-phase interaction between ionized nitrile sulfides and pyridine

AbstractThe gas-phase reactivity of ionized nitrile sulfides, R-CN+-S•, towards neutral pyridine was studied both experimentally (six sector hybrid mass spectrometer) and theoretically (density functional theory and Møller-Plesset ab initio calculations). An ionized sulfur atom transfer and a cycloaddition process respectively yielding ionized pyridine N-thioxide and a thiazolopyridinium cation were observed. Whereas the very efficient S•+ transfer reaction probably involves the intermediacy of several ion-molecule complexes, the thiazolopyridinium ion formation is likely to be initiated by an electrophilic attack of the R-CN+-S• ion on the nitrogen atom of pyridine; the resulting intermediate then undergo an intramolecular substitution of an α-hydrogen atom by the sulfur atom

Genetic variation in Douglas-fir : a 20-year test of provenances in eastern Nebraska

Twenty-year-old Douglas-fir trees in provenances from Arizona, New Mexico, and southern Colorado survived better and grew taller; but incurred more winter injury in eastern Nebraska than trees from provenances from northern Colorado, southern and western Montana, northern Idaho, Canada, and eastern Washington. However, surviving trees from Pacific Coast, and northern and central Rocky Mountain provenances increased in percent of plantation mean height during the past 9 years, whereas trees from southern Rocky Mountain provenances decreased. Age /age correlations indicate provenances expressing superior height growth can be identified at age 6.Keywords: Pseudotsuga menziesii var. glauca, P. menziessii, provenance, seed source, age /age correlation, winter injur

Notes sur la pathologie spontanée du chien de laboratoire. 3e note : A propos d’une « hépatectomie » spontanée

A propos d’un cas d’atrophie des lobes gauches du foie d’un jeune Chien, ayant entraîné une hypertrophie compensatrice des lobes droits, les auteurs envisagent les problèmes soulevés, essen tiellement celui du devenir expérimental de l’animal et celui de la pathogénie de cette rare lésion

Sarcome fuso-cellulaire généralisé sur un Daim Moucheté (Dama dama L.)

Ferney Jean, Van Haverbeke Georges, Collin P. Sarcome fuso-cellulaire généralisé sur un Daim Moucheté (Dama dama L.). In: Bulletin de l'Académie Vétérinaire de France tome 117 n°6, 1964. pp. 295-300

Anti-MDA5 positive dermatomyositis complicated with rapidly progressive interstitial lung disease : a case report

Case presentation: We present a case of a 55-year-old Caucasian male with manifestations of dermatomyositis complicated with rapidly progressive interstitial lung disease (RP-ILD). Diagnosis of anti-MDA5 positive dermatomyositis was made. Discussion: Myositis specific antibodies (MSA) can be used for diagnosis and predicting prognosis in patients with polymyositis and dermatomyositis. Anti-MDA5 positive dermatomyositis should be considered in patients presenting with dermatomyositis and a disease course resembling antisynthetase syndrome in the absence of antisynthetase autoantibodies, especially if a remarkably high ferritin is noted. Anti-MDA5 autoantibodies have been associated with RP-ILD and adverse outcome. In patients with anti-MDA5 autoantibodies, early diagnosis and aggressive immunosuppressive treatment may improve prognosis. Conclusion: This case highlights the importance of determining MSA in patients with dermatomyositis and associated interstitial lung disease, as this has implications for diagnosis, prognosis and therapy