Determination of critical temperatures and panicle development stage for fertility change of thermo-sensitive genic male sterile rice line ?5460S?

Euphytica ◽  
1993 ◽  
Vol 67 (1-2) ◽  
pp. 27-33 ◽  
Author(s):  
Sun Zongxiu ◽  
Cheng Shihua ◽  
Si Huamin
Keyword(s):  
Development Stage ◽  
Male Sterile ◽  
Critical Temperatures ◽  
Rice Line ◽  
Fertility Change ◽  
Panicle Development

scholarly journals Deep learning for automatic determination of blastocyst embryo development stage

2019 ◽  
Vol 112 (3) ◽  
pp. e273
Author(s):  
Alejandro Chavez-Badiola ◽  
Gerardo Mendizabal-Ruiz ◽  
Vladimir Ocegueda-Hernandez ◽  
Adolfo Flores-Saiffe Farias ◽  
Andrew J. Drakeley
Keyword(s):  
Deep Learning ◽  
Embryo Development ◽  
Development Stage ◽  
Automatic Determination

Cytoplasmic male sterility in Desmodium

1969 ◽  
Vol 20 (2) ◽  
pp. 227 ◽  
Author(s):  
KS McWhirter
Keyword(s):  
Cytoplasmic Male Sterility ◽  
Male Sterility ◽  
Interspecific Hybrid ◽  
Pollen Fertility ◽  
Pollen Sterility ◽  
Hybrid Origin ◽  
F1 Hybrids ◽  
Male Sterile ◽  
Genetic Stocks

A type of male sterility found in two Desmodium plants of probably interspecific hybrid origin was cytoplasmically inherited. The cytoplasmic male-sterile character was incorporated in the tropical legume Desmodium sandwicense by backcrossing. In this genetic background pollen sterility was complete. The male-sterile character was not graft-transmissible, and it produced no detectable pleiotropic effects on growth and development. Desmodium intortum gave restoration of pollen fertility in Fl hybrids with male-sterile lines of D. sandwicense. Restored F1 hybrids produced apparently normal pollen, but tests of functional ability of the pollen disclosed that pollen fertility was less than that of Fl hybrids with normal cytoplasm. Incomplete restoration of fertility was not due to heterozygosity of fertility-restoring genes with gametophytic expression, since fertility-restoring genes were shown to act sporophytically. The results established the occurrence in the legume Desmodium of a system of determination of the male-sterile, fertility-restored phenotypes that is similar to the cytoplasmic male sterility systems described in many other angiosperm plants. A scheme utilizing the genetic stocks produced in this study for commercial production of the interspecific hybrid D. sandwicense x D. intortum as a cultivar is presented.

Climatology of Cyclone Size Characteristics and Their Changes during the Cyclone Life Cycle

2007 ◽  
Vol 135 (7) ◽  
pp. 2568-2587 ◽  
Author(s):  
Irina Rudeva ◽  
Sergey K. Gulev
Keyword(s):  
Life Cycle ◽  
Quantitative Estimation ◽  
Strong Dependence ◽  
Development Stage ◽  
Effective Radius ◽  
Central Pressure ◽  
Sea Level Pressure ◽  
Size Evolution ◽  
Cyclone Tracking

Abstract Climatology of the atmospheric cyclone sizes and their change over the cyclone life cycle is analyzed on the basis of tracking 57 yr of NCEP–NCAR reanalysis sea level pressure data over the Northern Hemisphere. To quantify the atmospheric cyclone sizes a coordinate transform was used, which allows for the collocation of the cyclone center with the virtual pole and for the establishment of a unique coordinate system for the further determination of cyclone geometry. This procedure was incorporated into a numerical cyclone tracking scheme and provided quantitative estimation of cyclone geometry at every stage of the cyclone development. Climatological features of the distribution of the cyclone size characteristics (effective radius, asymmetry) are considered for the cyclones with different central pressure, deepening rate, and lifetime. Mean effective cyclone radius may experience significant changes, ranging from 300–400 km over the continents to more than 900 km over the oceans. There is found to be a strong dependence of the cyclone effective radius on the cyclone lifetime and intensity, implying the largest cyclone sizes for the most intense and long-living transients. Analysis of size changes during the cyclone life cycle implies that the cyclone radius increases during the development stage from 50% to 150%. Size evolution during the cyclone life cycle implies a universal dependence of the normalized cyclone effective radius and the normalized cyclone age. The actual maximum cyclone radius can be determined from these two nondimensional parameters and cyclone central pressure. Further application of the analysis of cyclone size and shape are discussed.

scholarly journals On a relation between the refractive and dispersive constants of the inert gases

1927 ◽  
Vol 114 (769) ◽  
pp. 659-661
Keyword(s):  
Accurate Determination ◽  
Inert Gases ◽  
Critical Temperatures ◽  
Philosophical Magazine ◽  
Empirical Relations ◽  
Five Elements ◽  
Made In

In 1911 I published in the ‘Philosophical Magazine’ a paper on new determinations of some constants of the inert gases, and drew attention to the remarkable empirical relations which subsist between (1) the calculated numbers of “dispersion” electrons in the atoms of these five elements, (2) their “viscosity diameters” as determined by Prof. A. O. Rankine, and (3) their critical temperatures. Since that time the figures used have undergone revision. The accurate determination of the value of ε by Millikan has enabled us to give absolute, instead of relative, values to the apparent numbers of dispersion electrons ( q , see Table I). Chapman has recalculated the viscosity diameters, and Rankine has revised Chapman’s values, in the light of corrections to be made in his own values of Sutherland’s constants for argon, krypton and xenon. But these alterations have not affected the validity of the relations then published.

THE CRITICAL TEMPERATURES AND PRESSURES OF THE THREE TWO-COMPONENT SYSTEMS COMPRISED OF CARBON DIOXIDE, METHYL ETHER AND PROPYLENE

1932 ◽  
Vol 6 (5) ◽  
pp. 458-470 ◽  
Author(s):  
C. A. Winkler ◽  
O. Maass
Keyword(s):  
Carbon Dioxide ◽  
Methyl Ether ◽  
Critical Temperatures ◽  
Compound Formation ◽  
Component Systems ◽  
Two Component ◽  
Two Component Systems ◽  
First Time ◽  
Three Components

The so-called critical temperatures and critical pressures for two-component systems are defined. For the first time three two-component systems have been investigated, involving three components taken two at a time. The three components were propylene, methyl ether and carbon dioxide. An experimental technique involving several new features is described. Accuracy in the determination of both critical temperatures and pressures is claimed. The system sulphur dioxide-methyl ether was also examined and the conclusions of previous investigators regarding compound formation confirmed. The results of the other three systems are analyzed and a theoretical discussion of these results reserved for a later publication.

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