Studies on the Flowering of Thlaspi arvense L. IV. Genetic and Ecological Differences between Early- and Late-Flowering Strains
- 1 June 1978
- journal article
- research article
- Published by University of Chicago Press in Botanical Gazette
- Vol. 139 (2) , 190-195
- https://doi.org/10.1086/336986
Abstract
The genetic difference between early-flowering (EF) and late-flowering (LF) strains of Thlaspi arvense was investigated by crossing the two strains under controlled conditions. All of the F1 plants were of the LF phenotype. Self-pollination of the F1 and a backcross to the EF parent gave progenies having phenotypic LF/EF ratios of approximately 3:1 and 1:1, respectively. We concluded that the difference between the two strains was determined by a single gene, with complete dominance of the LF allele. Progeny testing of natural populations showed that both strains occurred in populations which germinated in the spring or which overwintered as vegetative rosettes after germinating in the fall. In these populations, however, the majority of the plants were of the LF genotype, whereas progeny of summer-emerging populations were all of the EF strain.Keywords
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