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| Web URL(s): | https://dl.sciencesocieties.org/publications/cs/pdfs/37/4/CS0370041347
Last checked: 12/09/2016
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| Publication Type:
| Refereed |
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| Author(s): | Burson, Byron L. |
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| Author Affiliation: | USDA-ARS, Crop Germplasm Res. Unit, Dep. of Soil & Crop Sciences, Texas A&M University, College Station, TX 77843-2474 |
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| Title: | Apomixis and sexuality in some paspalum species |
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| Section: | Plant Genetic Resources
Other records with the "Plant Genetic Resources" Section
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| Source: | Crop Science. Vol. 37, No. 4, July/August 1997, p. 1347-1350. |
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| Publishing Information: | Madison, WI: Crop Science Society of America |
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| # of Pages: | 4 |
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| Keywords: | TIC Keywords: Paspalum; Apomixis; Polyploidy; Cytology; Reproduction; Chromosomes; Bivalents
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| Abstract/Contents: | "Paspalum is a large genus that contains several important forage and turfgrasses. Little or no information is available concerning the cytology and reproductive behavior of many of these species. The objectives of this study were to determine the cytology, method of reproduction, and fertility of accessions of eight different Paspalum species. Paspalum modestum Mez., P. monostachyum Vasey, P. repens Bergius, and one P. alcalinum Mez. accession were sexual diploids with 2n=2x=20 chromosomes. Meiosis was regular with primary bivalent pairing. Even though P. modestum was sexual, the female gametophyte deteriorated in 43% of the ovules. Two P. alcalinum, one P. falcatum Nees, two P. paucifolium Swallen, three P. polyphylum Nees, and one P. unispicatum (Scribn. et. Merr.) Nash accessions were tetraploids with 2n=4x=40 chromosomes. During meiosis their chromosomes associated primarily as bivalents, quadrivalents, and univalents. Regardless of the species, all tetraploids were facultative aposporous apomicts. One P. alcalinum accession was a pentaploid with 50 chromosomes. Meiosis was irregular with the chromosomes associating as univalents, bivalents, trivalents, and quadravalents. This accession reproduces as an obligate aposporous apomict. Seed set in P. modestum and P/ monostachyum was very low but was high enough in the other that they could be propagated by seed. These findings demonstrate the cytological and reproductive diversity within this large complex genus." |
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| Language: | English |
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| References: | 13 |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Burson, B. L. 1997. Apomixis and sexuality in some paspalum species. Crop Sci. 37(4):p. 1347-1350. |
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| Web URL(s):
https://dl.sciencesocieties.org/publications/cs/pdfs/37/4/CS0370041347
Last checked: 12/09/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: SB 183 .C7 |
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