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- Title
Genetic Analysis of the Species Cytoplasm Specific Gene (scs<sup>d</sup>) Derived from Durum Wheat.
- Authors
Gehlhar, S. B.; Simons, K. J.; Maan, S. S.; Kianian, S. F.; Gustafson, J. Perry
- Abstract
The action of species cytoplasm specific (scs) gene(s) can be observed when a durum (Triticum turgidum L.) nucleus is placed in the Aegilops longissimum S. & M. cytoplasm. This alloplasmic combination, (lo) durum, results in nonviable progeny. A scs gene derived from T. timopheevii Zhuk. (scsti) produced compatibility with the (lo) cytoplasm. The resulting hemizygous (lo) scsti -- durum line was male sterile and when crossed to normal durum produced a 1:1 ratio of plump, viable (PV) seeds with scsti and shriveled inviable (SIV) seeds without scsti. In a systematic characterization of durum lines an unusual line was identified that when crossed to (lo) scsti -- produced all PV seeds. When planted these PV seeds segregated at a 1:1 ratio of normal vigor plants (NVPs) and low vigor plants (LVPs). The LVP senescence before full maturity. The NVPs were male sterile and when crossed to common durum lines resulted in all plump seeds that again segregated at a 1:1 ratio of NVPs to LVPs. The crosses of these NVPs to common, durum lines resulted in a 1:1 ratio of PV to SIV seeds. This study was extended to 317 individuals segregating for scsti and the new locus, derived from durum wheat (scsd), establishing the allelic relationship of these two genes.
- Subjects
GENES; CYTOPLASM; EMMER wheat; DURUM wheat; CROSSING over (Genetics); PLANT genetics
- Publication
Journal of Heredity, 2005, Vol 96, Issue 4, p404
- ISSN
0022-1503
- Publication type
Article
- DOI
10.1093/jhered/esi054