| |
| Publication Type:
| Report |
|---|
| Content Type: | Abstract or Summary only |
|---|
| Author(s): | Baird, W. V.;
Mysore, K.;
Zeng, L.;
Werth, C. R. |
|---|
| Author Affiliation: | Baird and Zeng: Clemson University, Clemson, SC. Mysore: Purdue University, West Lafayette, IN. Werth: Texas Tech Univ., Lubbock. |
|---|
| Title: | A polyploid Eleusine sp. in the southeastern United States |
|---|
| Section: | Papers and Abstracts Presented
Other records with the "Papers and Abstracts Presented" Section
|
|---|
| Meeting Info.: | 49th Annual Meeting, Charlotte, NC, January 15-17, 1996 |
|---|
| Source: | Southern Weed Science Society Proceedings. Vol. 49, 1996, p. 149. |
|---|
| Publishing Information: | Champaign, IL: Southern Weed Science Society. |
|---|
| # of Pages: | 1 |
|---|
| Abstract/Contents: | "An enigmatic taxon belonging to the genus Eleusine was collected from Calhoun County, South Carolina, near the town of St. Mathews. These annual plants were first found in October of 1992 from a "wash" in a cotton production field. Similar plants were collected in the fall of the following year from the wash, as well as from an adjacent roadside (S9/119). Morphologically these plants are almost identical to goosegrass (E. indica), which is found abundantly in this area. However, they exhibit interesting phenotypic and cytogenetic difference from typical goosegrass. These fertile plants are comparatively larger than neighboring goosegrass plants. Also, they produce larger and heavier seeds, with smoother seed coats, than produced by goosegrass. Germination of these large seeds is 100% once the thick seed coat has been abraded. In addition, the ligules on the leaves are noticeably more pubescent than the membranous ligules of goosegrass. A preliminary examination of herbarium specimens indicated that plants with similar morphology, and labeled as E. indica, had been collected from the southeast as early as the 1920s. Root tip "squashes" revealed the presence of 36 chromosomes in the nuclei, and anthers showed 18 chromosomes in nuclei of developing microspores. Flow cytometric analysis estimated the 2C (= 4n?) nuclear DNA content to be 3.80 pg. In addition isozyme analysis revealed numerous heterzygous loci, which were fixed in the selfed progeny of these plants. Our findings are consistent with a tetraploid nuclear condition for this taxon. Whether this taxon is a (i) "doubled" goosegrass, (ii) the first example of E. africana (= E. coracana ssp. africana) in North America -- a weedy species thought to be restricted to Africa and India, or (iii) an entirely new hybrid species (E. indica x E. sp.) is not clear at this time. Cytogenetic data are consistent with all three possibilities. Morphological data are most consistent with the first and second possibilities. Isoenzyme data are most consistent with the second and third possibilities." |
|---|
| Language: | English |
|---|
| References: | 0 |
|---|
| Note: | This item is an abstract only! |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Baird, W. V., K. Mysore, L. Zeng, and C. R. Werth. 1996. A polyploid Eleusine sp. in the southeastern United States. South. Weed Sci. Soc. Proc. 49:p. 149. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=43081 |
| If there are problems with this record, send us feedback about record 43081. |
| Choices for finding the above item: |
|---|
| 
MSU catalog number: SB 611 .S6 |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
