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| Web URL(s): | http://www.jstor.org/stable/2431753
Last checked: 10/18/2013
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http://www.jstor.org/stable/pdfplus/2431753.pdf
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| Publication Type:
| Refereed |
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| Author(s): | Borrill, Martin;
Kirby, Madeleine;
Morgan, Gareth |
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| Author Affiliation: | Welsh Plant Breeding Station, Plas Gogerddan, Aberystwyth, Dyfed, U.K. |
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| Title: | Morphology, distribution and cytogenetics of F. donax, F. scariosa and their hybrids, and the evolutionary significance of their fertile amphiploid derivative |
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| Article Series: | Studies in Festuca, part 12 |
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| Source: | New Phytologist. Vol. 86, No. 4, December 1980, p. 423-439, Plate 1-3. |
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| Publishing Information: | Oxford, England, United Kingdom: Blackwell Publishing, for the New Phytologist Trust |
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| # of Pages: | 20 |
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| Related Web URL: | http://www.jstor.org/stable/info/2431753
Last checked: 10/18/2013
Notes: Abstract only |
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| Keywords: | TIC Keywords: Festuca; Hybridization; Taxonomy; Meiosis; Polyploidy
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| Abstract/Contents: | "Preferential pairing was studied following production of the fertile amphiploid hybrid F. donax × F. scariosa by colchicine treatment of hybrid seeds, and of triploids by back crossing the amphiploid to the parents. The S and D genomes showed considerable and approximately equal ability to pair preferentially in the SSD and SDD hybrids. The amphiploid showed marked bivalent pairing but little segregation, and was seed and pollen fertile. Compared with previous studies based on diploid hybrids between the sections Scariosae and Montanae, the results suggest a greater degree of differentiation of the genomes of these two sections than previously supposed. They are nevertheless more closely related to one another than to F. pratensis. The pubescence of the apex of the caryopsis observed in diploids of sections Scariosae and Montanae also occurs in polyploid species, but only in the Moroccan Atlas mountains, and is apparently another feature derived from F. scariosa. Pubescence of the leaf auricle, absent from diploidF. scariosa and from F. pratensis and related Lolium species, but present in diploid Montanae, occurred in the fertile C1 and C2r amphiploids of F. scariosa (glabrous) and F. donax (pubescent). This suggests that diploids of section Montanae could be the gene source of the auricle pubescence present in broad-leaved fescue polyploids exemplified by hexaploid tall fescue." |
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| Language: | English |
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| References: | 10 |
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| Note: | Pictures, b/w
Figures
Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Borrill, M., M. Kirby, and G. Morgan. 1980. Morphology, distribution and cytogenetics of F. donax, F. scariosa and their hybrids, and the evolutionary significance of their fertile amphiploid derivative. New Phytol. 86(4):p. 423-439, Plate 1-3. |
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| Web URL(s):
http://www.jstor.org/stable/2431753
Last checked: 10/18/2013
Access conditions: Item is within a limited-access website
http://www.jstor.org/stable/pdfplus/2431753.pdf
Last checked: 10/18/2013
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: b2219226 |
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