| Seed Stock |
Description |
Investigations |
Standard
(Improved Basic) |
standard Fast Plant for form and performance; flowers in 13-17 days, variable expression of purple pigment in stems |
life cycles, environmental science, botany, comparative morphology, physiology |
Purple Stem, Hairy
(High Anthocyanin) |
dominant expression of purple pigment in stems (also in petioles and bud tips); also selected for higher-than-usual number of hairs |
genetic studies of purple pigment (anthocyanin) production and expression in crosses with Non-Purple Stem mutant, study of inheritance of leaf hairs |
Non-Purple Stem
(Anthocyaninless) |
recessive gene blocks the expression of purple, red, or pink pigment, also selected for few or no hairs |
genetics (see Purple Stem, Hairy) |
| Yellow-Green Leaf |
recessive, leaves yellow-green, purple pigment in stems |
genetics, photosynthesis |
Non-Purple Stem,
Yellow-Green Leaf |
double recessive mutant, with yellow-green leaves and no purple pigment expressed in plant |
genetics, photosynthesis |
| Rosette-Dwarf |
recessive gene, gibberellin-deficient mutant, compact due to shortened internodes; attains normal height after application of 100 ppm gibberellic acid; flowering in 18 days |
genetics, physiology |
Tall Plant
(Elongated Internode) |
recessive, abnormally tall due to elongated internodes, gibberellin-overproducer; may require staking |
genetics, physiology |
| Petite |
recessive; plants reduced to a height of 5-15 cm; not a gibberellin-deficient mutant |
genetics, physiology |
| AstroPlant |
recessive; variant of Petite stock, shorter and more uniform in height (10 cm) |
genetics, research in space |
Variegated
(Somatic Variegated) |
maternal inheritance (chloroplasts); irregular patches of green white on green leaves |
maternal (cytoplasmic) inheritance, photosynthesis |
| F1 and F2 |
Description |
Investigations |
F1 Non-purple
Stem, Hairless |
F1 seed from a cross of Non-Purple Stem, Hairless with Purple Stem, Hairy. F1 has dark green leaves and a purple stem. Leaf hairs are intermediate |
Monohybrid genetics, quantitative genetics |
F2 Non -Purple
Stem, Hairless |
F2 plant show a 3:1 segregation of purple stem: non-purple stem and polygenic inheritance for leaf hairs. Score phenotypes 3 to 5 days after sowing |
monohybrid genetics |
F1 Non-Purple Stem,
Yellow-Green Leaf |
F1 seed is from the cross Non-Purple Stem with green leaves with Purple Stem, Yellow-Green Leaf. F1 has dark green leaves with purple pigment |
dihybrid genetics, quantitative genetics |
F2 Non-Purple
Stem, Hairless |
F2 plants show a ratio of 9 green and purple stem : 3 green and non-purple stem,: 3 yellow-green and purple stem : 1 yellow-green and non-purple stem. Score phenotypes 5-7 days after sowing in planting mix. |
dihybrid genetics, quantitative genetics |
| F1 Rosette |
F1 seed is from the cross Standard with Rosette-Dwarf. F1 resembles standard with green with purple anthocyanin in stems. |
monohybrid genetics |
