Yellow-green, Anthocyanin Standard 1-120

Sold in packs of 100 seeds.

Plants of stock 1-120 appear yellow green, Ygr1, on cotyledons, leaves, stems and developing pods. 

Stock 1-120 is selected for high expression of purple anthocyanin, Pan (8). In the early seedling stages of growth, the purple color may mask the yellow green, Ygr1, phenotype. 

The intensity of Pan expression is variable, Pan (0-9), and is increased by light, nutrient and water stress, low temperature and other environmental factors. Pan appears to be quantitatively inherited and may be quantified by scaling, using a color comparator scale, Pan (0-9). There appear to be major genes or loci that influence the intensity and location of Pan expression, e.g. on the cotyledons, hydathodes, sepal tips and style. 

Plants of stock 1-120 also have been selected for numerous hairs on stems and leaves, Hir (5). Hir is quantitatively inherited and may be determined by scaling Hir (0-9) or direct count.  Hairs on leaf margins can be easily counted.

The yellow-green background, Ygr1, was created in Brassica rapa through mutagenesis by Gary Stringham and introduced into the rapid-cycling Brassica rapa background through breeding and selection.

Trait: Yellow green
Genotype: ygr1/ygr1
Phenotype: Ygr
Inheritance Pattern: single, recessive trait

Trait: Purple Anthocyanin
Genotype: polygenic
Phenotype: Pan (8)
Inheritance Pattern: quantitative

Trait: Trichomes (Hairs)
Genotype: polygenic
Phenotype: Hir (5-8)
Inheritance Pattern: quantitative