QTLs for Morphogenetic Traits in Medicago Truncatula

Plant morphogenesis that includes growth, development and flowering date, drives a large number of agronomical important traits in both grain and forage crops. Quantitative trait locus (QTL) mapping is a way to locate zones of the genome that are involved in the variations observed in a segregating population. Co-location of QTLs and candidate genes is an indication of the involvement of the genes in the variation. The objective of this study was to analyse segregation of aerial morphogenetic traits in a mapping population of recombinant inbred lines of the model legume species M. truncatula , to locate QTLs and candidate genes

Quantification of the level descriptors for the standard EQ-5D three-level system and a five-level version according to two methods

Objectives: Our aim was to compare the quantitative position of the level descriptors of the standard EQ-5D three-level system (3L) and a newly developed, experimental five-level version (5L) using a direct and a vignette-based indirect method. Methods: Eighty-two respondents took part in the study. The direct method represented a visual analog scale (VAS) rating of the nonextreme level descriptors for each dimension and each instrument separately. The indirect method required respondents to score 15 health scenarios with 3L, 5L and a VAS scale. Investigated were: (1) equidistance (Are 3L and 5L level descriptors distributed evenly over the VAS continuum?); (2) isoformity (Do the identical level descriptors on 3L and 5L yield similar results?); and (3) consistency between dimensions (Do the positions of similar level descriptors differ across dimensions within instruments?). Results: Equidistance without transformation was rejected for all dimensions for both 3L and 5L but satisfied for 5L after transformation. Isoformity gave mixed results. Consistency between dimensions was satisfied for both instruments and both methods. Discussion: The level descriptors have similar distributions across comparable dimensions within each system, but the pattern differs between 3L and 5L. This methodological study provides evidence of increased descriptive power and a broadened measurement continuum that encourages the further development of an official five-level EQ-5D

Étude de la bande v3 de 13CH4 entre 2 863 et 3132 cm-1

The absorption spectrum of the 13CH4 molecule in the 3μ region has been recorded at high resolution. 245 allowed transitions belonging to the ν3 band have been interpreted by using a special iterative procedure based on a set of quasi linear equations. The numerical process is quickly convergent and 15 significant spectroscopic constants have been determined. When these constants are checked by the standard damped least squares method, no noticeable change appears in this refinement calculation. The mean standard deviation between the observed and calculated wavenumbers for the 245 transitions is 0.013 cm-1 and the largest deviation does not exceed 0,043 cm-1. This accuracy is a good check for our assignment.Le spectre d'absorption de la molécule 13CH4 dans la région de 3μ a été enregistré à haute résolution. 245 transitions permises appartenant à la bande ν3 ont été interprétées au moyen d'un processus itératif particulier fondé sur un système d'équations quasi linéaires. Le calcul rapidement convergent fait intervenir 15 constantes spectrales significatives. Ces constantes ne sont pratiquement pas modifiées lorsqu'on les soumet à la méthode habituelle des moindres carrés avec amortissement. L'écart quadratique moyen entre les nombres d'onde observés et calculés est de 0,013 cm-1 et le plus grand écart ne dépasse pas 0,043 cm -1. Cette précision confirme la validité de notre identification

Transfer of SRR markers from Medicago truncatula towards alfalfa (M. sativa)

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