Influence of homoeologous chromosomes on gene-dosage effects in allohexaploid wheat (Triticum aestivum L.)
1978
Aragoncillo Ballesteros, Cipriano | Rodriguez Loperena, M.A. | Salcedo Duran, Gabriel | Carbonero Zalduegui, Pilar | García Olmedo, Francisco
Gene-dosage responses for a group of six wheat endosperm proteins have been investigated by using compensated nulli-tetrasomic lines of cv. Chinese Spring. Practically linear dosage responses have been observed for all the proteins. However, for two of the proteins (and probably for a third one), the net output of protein, at each dosage of its structural gene, was 30-80% higher when the chromosome carrying an active homoeogene was absent. The possible significance of this effect in connection with the loss of gene redundancy undergone by polyploids is discussed.
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