Flowering Phenology and Outcrossing in Tetraploid Grindelia camporum Green
| dc.contributor.author | Schuck, Susan M. | |
| dc.contributor.author | McLaughlin, Steven P. | |
| dc.date.accessioned | 2016-05-11T21:47:35Z | en |
| dc.date.available | 2016-05-11T21:47:35Z | en |
| dc.date.issued | 1988 | en |
| dc.identifier.issn | 0734-3434 | en |
| dc.identifier.uri | http://hdl.handle.net/10150/609102 | en |
| dc.description.abstract | Several reproductive processes of tetraploid Grindelia camporum were investigated. This plant is a potential resin crop for the southwestern United States. Field observations of 100 flower heads from unopened buds through 100% achene dispersal were made. It was found that individual flower heads are available for pollination for approximately 5 days but all disc florets are open for only 1 day. On average, achenes mature in 22 days and are dispersed 53 days after flowering. Fourteen-hundred hand-pollinations were also made on plants from 6 wild populations of G. camporum grown in a greenhouse and shade house. Estimates of fertility and crossability of populations were made based on achene number and achene weight data from these crosses. All populations studied were interfertile and no evidence of outbreeding depression in between -population crosses was found. It is shown that tetraploid G. camporum is self-incompatible and requires manipulation for achene set. | |
| dc.language.iso | en_US | en |
| dc.publisher | University of Arizona (Tucson, AZ) | en |
| dc.rights | Copyright © Arizona Board of Regents. The University of Arizona. | en_US |
| dc.source | CALS Publications Archive. The University of Arizona. | en_US |
| dc.title | Flowering Phenology and Outcrossing in Tetraploid Grindelia camporum Green | en_US |
| dc.type | Article | en |
| dc.contributor.department | University of Arizona | en |
| dc.identifier.journal | Desert Plants | en |
| dc.description.collectioninformation | Desert Plants is published by The University of Arizona for the Boyce Thompson Southwestern Arboretum. For more information about this unique botanical journal, please email the College of Agriculture and Life Sciences Publications Office at pubs@cals.arizona.edu. | en_US |
| refterms.dateFOA | 2018-06-17T17:29:51Z | |
| html.description.abstract | Several reproductive processes of tetraploid Grindelia camporum were investigated. This plant is a potential resin crop for the southwestern United States. Field observations of 100 flower heads from unopened buds through 100% achene dispersal were made. It was found that individual flower heads are available for pollination for approximately 5 days but all disc florets are open for only 1 day. On average, achenes mature in 22 days and are dispersed 53 days after flowering. Fourteen-hundred hand-pollinations were also made on plants from 6 wild populations of G. camporum grown in a greenhouse and shade house. Estimates of fertility and crossability of populations were made based on achene number and achene weight data from these crosses. All populations studied were interfertile and no evidence of outbreeding depression in between -population crosses was found. It is shown that tetraploid G. camporum is self-incompatible and requires manipulation for achene set. |
