Talk:Georgii Karpechenko

Untitled

Just a comment that others may or may not want to heed: Raphanobrassica was an experimental allopolyploid -- I don't think it was intended to be taken as a new species, and such artificial crosses are never or rarely touted as "species" in practice -- if they were, orchid hybridizers would be able to brag about having created 100,000 or so species. Reference 3 appears to be non-scholarly, and the NIH reference does not support the assertion that Raphanobrassica is a new species. A quick skim of Karpechenko's article cited in the references shows that he referred to them in the standard fashion -- as hybrids and not as species. The phrase "synthetic species" seems to originate in this Canadian Plant Science article and I suspect the term was used loosely and wasn't meant to meet any definition that would satisfy a taxonomist as to a literal s p e c i e s. --♦♦♦Vlmastra♦♦♦ (talk) 03:16, 13 March 2011 (UTC)

Hi, I've clarified a bit. Allopolyploids are often "new species" that cannot interbreed with their ancestral species, and I can assure you that some of us botanists talk about that all the time. Mayr's Biological Species Concept clearly applies here. Karpechenko did refer to his creation as Raphanobrassica in the German paper cited, which is a popular article. I'm not sure if that is the first time he referred to it by that name. Orchid hybrids are largely diploid-diploid hybrids between different species or genera. The taxonomy of the species and genera is based on natural mechanisms that prevent interbreeding in nature, such as flowering at different times or relying on different pollinators. The progeny (if fertile) are generally just as well able to interbreed with their ancestors as the ancestors were with one another. A ploidy-level jump such as Karpechenko obtained, acts as a barrier to interbreeding (because of the Endosperm Balance Requirement, also known as the Triploid Block Effect). Karpechenko's work is very significant indeed, I recommend The Blackburn Press Classic papers in horticultural science if you have access to that, it includes a preface to the paper. Nadiatalent (talk) 16:09, 13 March 2011 (UTC)

External links modified

Hello fellow Wikipedians,

I have just modified one external link on Georgii Karpechenko. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:

• Added archive https://web.archive.org/web/20100212001915/http://bio.org/speeches/pubs/er/timeline.asp to http://www.bio.org/speeches/pubs/er/timeline.asp

When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.

This message was posted before February 2018. After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than regular verification using the archive tool instructions below. Editors have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the RfC before doing mass systematic removals. This message is updated dynamically through the template {{source check}} (last update: 5 June 2024).

• If you have discovered URLs which were erroneously considered dead by the bot, you can report them with this tool.
• If you found an error with any archives or the URLs themselves, you can fix them with this tool.

Cheers.—InternetArchiveBot (Report bug) 13:29, 14 October 2017 (UTC)

External links modified

Hello fellow Wikipedians,

I have just modified one external link on Georgii Karpechenko. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:

• Added archive https://web.archive.org/web/20040814160329/http://article.pubs.nrc-cnrc.gc.ca/ppv/RPViewDoc?_handler_=HandleInitialGet to http://article.pubs.nrc-cnrc.gc.ca/ppv/RPViewDoc?_handler_=HandleInitialGet&journal=cjps&volume=85&articleFile=P03-147.pdf

When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.

This message was posted before February 2018. After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than regular verification using the archive tool instructions below. Editors have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the RfC before doing mass systematic removals. This message is updated dynamically through the template {{source check}} (last update: 5 June 2024).

• If you have discovered URLs which were erroneously considered dead by the bot, you can report them with this tool.
• If you found an error with any archives or the URLs themselves, you can fix them with this tool.

Cheers.—InternetArchiveBot (Report bug) 19:09, 7 December 2017 (UTC)