Regulatory effects of homoeologous chromosome arms on wheat proteins at two developmental stages.
Two-dimensional gel electrophoresis was conducted on denatured proteins of the 10-day-old first leaf (1F stage) of 18 homoeologous ditelosomic (DT) lines of wheat cultivar 'Chinese Spring'. The observations, compared to the euploid control and relative to previous data found on 7-day-old etiolated seedlings (G7 stage) of the same lines lead to the following statements: 1) the structural genes of 24 spots can be assigned to 12 chromosome arms; 2) regulatory effects are completely different between the 1F and the G7 stages which may indicate that the regulation of protein amounts is often stage-specific; 3) no case of complete gene dosage compensation is observed among 4 groups of hypothesized homoeoallelic products; 4) homoeologous DT lines do not manifest similar effects which suggest the absence of homoeology for the detected regulatory effects.
Laboratoire de Génétique des Systèmes Végétaux, CNRS, INRA, UPS, F-91190, La Ferme du Moulon, Gif-sur-Yvette, France.
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H
Thiellement
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N
Bahrman
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C
Colas des Francs