摘要:

Lenzites saepiaria,L.trabea, andTrametes americanaare heterothallic and bipolar. In each species complete interfertility exists between haploid mycelia derived from different sources.T.americanais sometimes considered to be a pored form ofL.saepiaria. The failure to obtain clamp connections in any pairing of a haploid mycelium ofL.saepiariawith a haploid mycelium ofT.americanaseems significant and lends weight to the conclusion that these two forms are distinct. Haploid mycelia ofL.thermophilaare completely interfertile with those ofL.trabea.

ISSN:1923-4287    

DOI:10.1139/cjr36c-018

出版商:NRC Research Press    

年代:1936

数据来源: NRC

摘要:

Except in the cases of a flour of unusually high protein content (19%) and a Pacific Club wheat flour of 7.6% protein, the loss of gluten protein after four hours' fermentation was about 17% and the change in water-holding capacity was negligible. There was practically no differentiation between flours from heavily frosted wheat and average sound flours. The 19% protein flour, however, showed a loss of gluten protein of only 5 % and a slight increase in water-holding capacity; the Club flour showed a loss of 43.4% in gluten protein and a decrease of 27% in water-holding capacity. It is concluded that these two properties of gluten cannot be used to differentiate most flours.

ISSN:1923-4287    

DOI:10.1139/cjr36c-019

出版商:NRC Research Press    

年代:1936

数据来源: NRC

摘要:

In continuance of a previous statistical study, the correlation between plot yields of wheat grown at experimental stations in central and southern Saskatchewan and Alberta and the amount of precipitation during the autumn, winter and spring months prior to sowing was investigated.There was a significant relation between pre-seasonal precipitation and the yield secured from year to year on both the fallowed and stubble plots of a summerfallow-wheat-wheat rotation, above-average moisture being associated with increased yields. The annual yields of Marquis wheat from more fertile summerfallowed varietal test plots were not, however, significantly correlated with pre-seasonal precipitation, nor was there any consistent relation between this weather factor and the relative yield of certain early, medium-early and late-maturing varieties.The annual average yield of wheat per acre from 1916–34 in three central and in three southern crop districts of Saskatchewan and Alberta showed a significant positive correlation with the available statistics of rainfall between May 1 and July 31. Yields in the southern districts were also positively correlated with pre-seasonal precipitation, whereas those in the central districts were not. The degree of association (R = 0.74, central; and 0.79, southern) was not adequate for the practical forecasting of annual production, but may be improved by refinements dependent on the accumulation of additional observational data.

ISSN:1923-4287    

DOI:10.1139/cjr36c-020

出版商:NRC Research Press    

年代:1936

数据来源: NRC