Abstract
Recent evidence suggests chloroplast introgression fromMicroseris bigelovii intoM. douglasii. We have examined 23 plants from a population ofM. douglasii polymorphic forM. douglasii andM. bigelovii chloroplast types. All 23 plants were completely homozygous for morphological and RAPD markers, and inbred lines derived by selfing have been used for DNA analysis. Chloroplast RFLP analysis identified 16 plants withM. bigelovii chloroplasts and seven withM. douglasii chloroplasts. The nuclear genomes of the 16 plants withM. bigelovii chloroplasts were examined with 22 primers for RAPD amplification products shared exclusively withM. bigelovii. Five of 268 markers appeared to be shared betweenM. bigelovii and one or more of these 16 plants on the basis of their position in gels. Detailed examination of these five amplification products showed that none of them are nuclear DNA fromM. bigelovii. Very little, if any, nuclear DNA fromM. bigelovii can be present inM. douglasii plants with chloroplasts typical ofM. bigelovii. The study demonstrates the usefulness of the RAPD technique for screening large numbers of markers to select a few potentially informative ones for rigorous examination.
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Dedicated to emer. Univ.-Prof. DrFriedrich Ehrendorfer on the occasion of his 70th birthday
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Roelofs, D., Bachmann, K. Genetic analysis of aMicroseris douglasii (Asteraceae) population polymorphic for an alien chloroplast type. Pl Syst Evol 206, 273–284 (1997). https://doi.org/10.1007/BF00987952
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DOI: https://doi.org/10.1007/BF00987952