Monosomic analysis on the fertility restoration by Triticum aestivum cv. Chinese Spring against Aegilops ovata cytoplasm.

Publisher Website
Google Scholar
Abstract
In order to provide a genetic basis for fertility restoration by a common wheat, T. aestivum cv. Chinese Spring against the cytoplasm of A. ovata, 2 sets of monosomic analysis were carried out. Rfo2 gene, a key factor on chromosome 1B of Chinese Spring restores in its double dose selfed seed fertility to above 25%. In its single dose the presence of a factor on chromosome 7A and another factor either on chromosome 5A or 5B, both in double dose, is necessary to assure the same level of fertility restoration. Absence of the key gene (Rfo2) causes complete sterility. Modifiers which improve the level of fertility restoration to some extent are located on chromosome 1A, 4A and 7D of ''Chinese Spring''. Since the single dose of Rfo2 gene cannot restore fertility to above 25% when other restoring genes are in heterozygous condition, utilization of this gene in breeding both hybrid wheat and bred-true, fertile line with the ovata cytoplasm is greatly limited. The results provided another example of the linkage between fertility-restoring gene and a nucleolus-organizing region.

This publication has 1 reference indexed in Scilit: