Abstract
CrossingMicroseris pygmaea (10 pappus parts) withM. bigelovii (5 pappus parts) results in hybrids with variable pappus part numbers between 5 and 10. Previous work has shown that a system of four additively acting genes determines the average pappus part numbers of these hybrids. In hybrid B87 two genes have a 10-determining and a 5-determining allele each, two others a 5-determining and a null (inactive or missing) allele. Genetic linkage of one of the latter with the enzyme geneEsterase-1 and the leaf shape genespatulate leaves has been demonstrated. Here we demonstrate linkage between one of the two 10-determining genes and the enzyme locusEsterase- Y/B. The genotypes in the pappus part system of many specimens can now be fully determined. This is a major advance for the analysis of the evolution of this additive polygenic system.
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Bachmann, K., 1983: Evolutionary genetics and the genetic control of morphogenesis in flowering plants. — Evol. Biol.16, 157–208.
, 1978: Pappus part number in annual species ofMicroseris (Compositae, Cichoriaceae). — Pl. Syst. Evol.129, 119–134.
, 1981: Genetic determination of pappus part number in the annual hybridMicroseris B87 (Asteraceae-Lactuceae). — Pl. Syst. Evol.138, 235–246.
, 1982: Four additive genes determining pappus part numbers inMicroseris annual hybrid C34 (Asteraceae/Lactuceae). — Pl. Syst. Evol.141, 123–141.
, 1983: Spatulate leaves: a marker gene for the evolution ofMicroseris bigelovii (Asteraceae-Lactuceae). — Beitr. Biol. Pflanzen57, 167–179.
Carlquist, S., 1981: Chance dispersal. — American Scientist69, 509–516.
Chambers, K. L., 1955: A biosystematic study of the annual species ofMicroseris. — Contrib. Dudley Herbarium4, 207–312.
, 1963: Amphitropical species pairs inMicroseris andAgoseris (Compositae:Cichorieae). — Quart. Rev. Biol.38, 124–140.
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Genetics of Pappus Part Numbers inMicroseris Hybrid B87, II.—Part I:Bachmann & al. 1981.
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Bachmann, K., Chambers, K.L. & Price, H.J. A second marker enzyme in the genetics of pappus part numbers inMicroseris hybrid B87 (Asteraceae, Lactuceae). Pl Syst Evol 145, 243–258 (1984). https://doi.org/10.1007/BF00983952
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DOI: https://doi.org/10.1007/BF00983952