Hybridization is frequent in many organismal groups, but its role in adaptation is poorly understood. In sunflowers, species found in the most extreme habitats are ancient hybrids, and new gene combinations generated by hybridization are speculated to have contributed to ecological divergence. This possibility was tested through phenotypic and genomic comparisons of ancient and synthetic hybrid...

The objective of the present study was to correlate the genetic distances (GD) of single cross hybrids with yield, heterosis and specific combining ability (SCA) in the double cross hybrid synthesis. For this, 10 single cross commercial hybrids were used from different companies, and all the possible double hybrids were synthesized by a complete dialell. The hybrids were assessed in 15 location...

Un enfant de 12 ans atteint d'un lymphome medias­tinal a ete hospitalise pour des manifestations neurolo­giques comportant: facies myasthenique, douleurs radi­culaires intenses, amyotrophie et diminution de la force musculaire au niveau des membres.  A l'examen du liquide cephalo-rachidien, ii existait une meningite neoplasique. Celle-ci a ete traitee par le methotraxate intra-rachidien parall...

In this paper, interspecific crosses among Crambe abyssinica, Crambe hispanica, and Crambe kralikii were reported. In the C. hispanica x C. abyssinica (H x A) cross, 118 F1 hybrids were produced without embryo rescue, while 5 F1 hybrids were obtained with embryo rescue, when C. hispanica was used as the female parent. In the reciprocal cross (A x H), 232 hybrids were obtained without embryo res...

Understanding the extent, scale and genetic basis of local adaptation (LA) is important for conservation and management. Its relevance in salmonids at microgeographic scales, where dispersal (and hence potential gene flow) can be substantial, has however been questioned. Here, we compare the fitness of communally reared offspring of local and foreign Atlantic salmon Salmo salar from adjacent Ir...

Rice is a staple food in West Africa, where its demand keeps increasing due to population growth. Hence, there is an urgent need to identify high yielding rice cultivars that fulfill this demand locally. Rice hybrids are already known to significantly increase productivity. This study evaluated the potential of Asian hybrids with good adaptability to irrigated and rainfed lowland rice areas in ...

la reine morte  fut écrite par montherlant en 1942. elle met en scène une reprise d'un drame historique intitulé «régner après sa mort» de l'auteur espagnol luis vélez de guevara (1579-1644). beaucoup plus différente en détail, la pièce de montherlant comprend les conflits des protagonistes, à savoir ferrante le roi du portugal, don pedro son fils et sa belle-fille inès de castro. elle aboutit ...

Radiation hybrids have become a widely used tool for physical mapping. A drawback of the technique is that large numbers of hybrids are required to construct robust, high-resolution maps. The information contained within a panel of radiation hybrids is limited by the frequency of retention of chromosomal fragments from the donor cell line. In almost all experiments to date, the retention freque...

Des infections Microbiennes de l'apparell urinaire se voient beaucoup en periode de gros­sesse.  Chez 25% des femmes enceintes, la bacteru­rie sans symptomes aboutit a une infection sym­ptomatique des voiles urinaires dans les mois ulterieurs de la grossesse, c'est pour cette raison qu'il est utile de demander, comme routine, des examens bacteriologiques d'urine, surtout pen­dant la grossesse....