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GrainGenes Gene Report: Sd1 (Lophopyrum)

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Gene	Sd1 (Lophopyrum)
Gene Class	Gametocidal activity
Reference	Zhang W et al. (2005) Molecular characterization of durum and common wheat recombinant lines carrying leaf rust resistance (Lr19) and yellow pigment (Y) genes from Lophopyrum ponticum Theoretical and Applied Genetics 111:573-582. Prins R and Marais GF (1999) A genetic study of the gametocidal effect of the Lr19 translocation of common wheat. South African Journal of Plant and Soil 16:10-14. Zhang HB and Dvorak J (1990) Characterization and distribution of an interspersed repeated nucleotide sequence from Lophopyrum elongatum and mapping of a segregation-distortion factor with it. Genome 33:927-936. Kibirige-Sebunya I and Knott DR (1983) Transfer of stem rust resistance to wheat from an Agropyron chromosome having a gametocidal effect. Canadian Journal of Genetics and Cytology 25:215-221.
URL	Sd1 gene at Komugi: Catalogue of Gene Symbols for Wheat
Chromosome	7D Zhang HB and Dvorak J (1990) Characterization and distribution of an interspersed repeated nucleotide sequence from Lophopyrum elongatum and mapping of a segregation-distortion factor with it. Genome 33:927-936.
Germplasm	Hexaploid stock Agatha Sd2 Prins R and Marais GF (1999) A genetic study of the gametocidal effect of the Lr19 translocation of common wheat. South African Journal of Plant and Soil 16:10-14.
Comment	Mapping: Proximal to Lr19 and distal to Xpsr165-7D (Zhang et al., 2005). In the presence of both Sd1 and Sd2, Lr19 is transmitted preferentially in heterozygotes, the degree of distortion being determined by genetic background. In heterozygotes with the same background, and in the presence of only Sd2, Lr19 shows strong self-elimination. Based on these results, it seems likely that the Sears' translocation 7D-7Ag#7 does not carry Sd1 (Prins and Marais, 1999). Genes with gametocidal activity, Sd1 (Zhang and Dvorak, 1990) and Sd2 (Prins and Marais, 1999), in wheat are present in homoeologous group 7 chromosomes of Thinopyrum elongatum (Kibirige-Sebunya and Knott, 1983; Zhang and Dvorak, 1990).
Info Source	McIntosh RA et al. (2013) Catalogue of Gene Symbols for Wheat- 2013 Edition Catalogue of Gene Symbols for Wheat.
Data Curator	Cooper, Laurel Feb-2021

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