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- W2904672273 abstract "La segregation de 8 marqueurs enzymatiques a ete etudiee parmi 444 cals obtenus a partir de microspores et 178 plants F2, issus de l'hybride F1 japonica x indica IRAT 177 x Apura. La large expression des genes codant pour les isozymes dans les cals de riz developpes a partir de microspores a permis de montrer que 100% des cals sont issus de microspores (et non de cellules somatiques). La segregation de 5 isozymes marqueurs correspond au rapport attendu. Par contre, des deviations aux loci Amp-2 et Pgd-1, probablement dues a la sterilite hydride dans les croisements F1 entre des varietes de riz eloignees, sont observees dans les deux populations etudiees. Il apparait donc que les phenomenes entravant l'utilisation des croisements eloignes dans la selection traditionnelle du riz peuvent egalement affecter la selection parmi des haploides doubles. De plus, une deviation significative au locus Pgi-1 n'a ete observee que parmi les cals obtenus a partir de microspores, indiquant par la que la culture d'antheres (CA) elle-meme ajoute une selection gametique dans le pool des microspores cultives in vitro. On peut penser que les derives CA ne representent pas un assortiment gametique totalement au hasard. Ces resultats sont conformes aux donnees precedemment enregistrees avec les lignees CA issues de meme croisement" @default.
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- W2904672273 date "1988-01-01" @default.
- W2904672273 modified "2023-09-23" @default.
- W2904672273 title "Segregation of 8 isozyme genes among microspore-derived calli of a japonica x indica cross of rice (Oryza sativa L.)" @default.
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