AI Article Synopsis
- The study focused on the isozymes menadione reductase (MNR), nicotinamide adenine dinucleotide dehydrogenase (NDH), and diaphorase (DIA) in wheat and diploid Triticeae species.
- The Mnr1, Ndh3, and Dia1 loci were found on specific chromosome arms in Triticum aestivum and had similar locations in other related species.
- Findings indicated a tetrameric behavior for certain isozymes and defined relationships among different loci suggesting genetic linkage among them.
Article Abstract
The menadione reductase (MNR), the nicotinamide adenine dinucleotide dehydrogenase (NDH) and diaphorase (DIA) isozymes were studied in the allohexaploid Triticum aestivum cv "Chinese Spring" and in five diploid Triticeae species. The Mnr1, Ndh3and Dia1 loci were located on the chromosome arms 3AL, 3BL and 3DL of T. aestivum, respectively. These loci were also located on the 3H chromosome of Hordeum vulgare cv "Betzes", the 3L chromosome of Aegilops longissima and the 6RL chromosome arm of Secale cereale cv "Imperial". The chromosomal location results together with the segregation studies support a tetrameric behaviour of the MNR1, NDH3 and DIA1 isozymes. The Ndh1 and Dia3 loci were located on homoeologous group 4 showing a monomeric behaviour. The chromosomal locations and linkage data of the Mnr, Ndh and Dia loci suggest that Mnr1=Ndh3=Dia1; Ndh1=Dia3 and Ndh2=Dia2.
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| http://dx.doi.org/10.1007/s001220100752 | DOI Listing |
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