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Tytuł:
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Genetic control of floral morph in tristylous Pickerelweed (Pontederia cordata L.).
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Autorzy:
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Gettys LA; Department of Agronomy Plant Genetics and Breeding, University of Florida Institute of Food and Agricultural Sciences IFAS, 304 Newell Hall, Box 110500, Gainesville, FL, USA. />Wofford DS
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Źródło:
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The Journal of heredity [J Hered] 2008 Sep-Oct; Vol. 99 (5), pp. 558-63. Date of Electronic Publication: 2008 May 21.
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Typ publikacji:
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Journal Article; Research Support, Non-U.S. Gov't
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Język:
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English
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Imprint Name(s):
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Publication: New York, NY : Oxford University Press For The American Genetic Association
Original Publication: Baltimore [etc.] American Genetic Assn.
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MeSH Terms:
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Flowers/*genetics
Pontederiaceae/*genetics
Flowers/anatomy & histology ; Genes, Plant ; Pontederiaceae/anatomy & histology ; Reproduction
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Entry Date(s):
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Date Created: 20080524 Date Completed: 20080908 Latest Revision: 20080807
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Update Code:
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20240104
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DOI:
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10.1093/jhered/esn031
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PMID:
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18499647
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Pickerelweed (Pontederia cordata L.) is a diploid (2n = 2x = 16) tristylous aquatic perennial. Populations usually contain 3 floral morphs that differ reciprocally in style length and anther height (referred to as the long-, mid-, and short-styled morphs, hereafter L-, M-, and S-morphs). The floral polymorphism promotes disassortative mating among the 3 floral morphs and is maintained in populations by negative frequency-dependent selection. The objective of this study was to determine the number of loci, number of alleles, and gene action controlling floral morph in pickerelweed. Three parental lines (one each of the L-, M-, and S-morph) were used to create S1 and F1 populations. F2 populations were produced through self-pollination of F1 plants. Progeny ratios of S1, F1, and F2 generations revealed that tristyly is controlled by 2 diallelic loci (S and M) with dominant gene action. The S locus is epistatic to the M locus, with the S-morph produced by plants with the dominant S allele (genotype S _ _ _). Plants with recessive alleles at the S locus were either L-morph (ssmm) or M-morph (ssM_). The results of this experiment demonstrate that the inheritance of tristyly in pickerelweed is the same as previously reported for several tristylous species in the Lythraceae and Oxalidaceae.