The inheritance of colour in diploid potatoes

摘要: 1. Two independent loci are shown to be concerned with the development of certain anthocyanin pigments throughout plant body diploid cultivated potatoes. A third locus is epistatic these in its homozygous recessive phase and suppresses pigment tuber only. 2. One locus, designatedP, governs occurrence an acylated glycoside petunidin tuber, sprout flower, this respect corresponds ‘wild-type’ wild tuberous species which same derivative occurs alone. 3. Two alleles other designatedR, identified hypostatic toP. The dominant,R, absence P, has a dual effect: pelargonidin only, cyanidin flower only. Epistasy incomplete where also presence ofP. These multiple effects inseparable heredity. In individuals for recessiveP pw, ofP, do not occur. 4. An peonidin all diploids, consequence no conclusions can drawn about inheritance. This suppressed flowers only genotypes forR pw. suggestion made that further search might reveal alleler ofP would expected suppress pigments, at least tubers flowers. 5. Types anthocyamdins than occur potatoes but similar diploids tetraploids. Presumably, variability been established by human selection level evolution tetraploidy was later event genetic history