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PI 651794
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| ACCESSION | PLANT NAME | TAXONOMY | ORIGIN | GENEBANK | IMAGE | AVAILABILITY | RECEIVED | SOURCE TYPE | SOURCE DATE | COLLECTION SITE | COORDINATES | ELEVATION | HABITAT | IMPROVEMENT LEVEL | NARRATIVE | | |
|---|
| 0 | PI 631156 | TTU-LRC | Ricinus communis L. | Texas, United States | S9 | | | 2002 | DEVELOPED | | | | | | Breeding material | During the F3, F4, and F5 generation, open pollinated seeds of these crosses were screened for reduced levels of ricin and RCA120 using a radial immunodiffusion (RID) assay. Plants were also selected for yield and dwarf internode growth habit in these segregating generations. Approx. 50 plants from each F6 parent were randomly intercrossed in an isolated field nursery during the 2000 growing season at Lubbock, TX. Approx. 40 plants, which did not exhibit dwarf-internode growth habit, were removed prior to pollination. Phenotypic analyses conducted on a sample of 118 of the F6 parental plants showed that plant height ranged from 33 to 119 cm. Less than 10% of the plants produced spineless capsules and less than 5% of the plants had red stems or leaves. The presence of spineless capsules and red leaves and stems indicated there had been limited cross pollination with other accessions during the segregating generations of these crosses. The RID assay was used to determine the ricin+RCA 120 content of 30 open pollinated seeds harvested from the 2000 crossing block. These seeds ranged from 0.10 to 5.60 mg of ricin+RCA120g-1 of seed and averaged 1.86 mg ricin+RCA120g-1 of seed. This compares to an average 12.2 mg ricin+RCA120g-1 of seed in the cultivar Hale in an earlier study. Seeds of PI 257654 and PI 258368 averaged 1.5 and 2.9 mg ricin+RCA120g-1 seed in this study, respectively. | 1637000 | PI 631156 |