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Post by Adam Cotton on Mar 9, 2018 18:47:05 GMT
While it is possible that this aberration is genetic it could also be caused by other environmental factors than just temperature.
Assuming it was genetic it should theoretically be possible to breed similar specimens in subsequent generations, but success really would depend on whether the genes causing this aberration are dominant or recessive (if the latter then it would be necessary to breed 2 generations before the aberration would be expressed again, and then in only a relatively small percentage of the offspring). However, even if the aberration does have a genetic basis, it is possible that it is the expression of a particular combination of several genes, and in that case it would be much more difficult to breed specimens with the same combination of genes.
It will be interesting to hear the opinions of other forum members.
Adam.
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Post by nomad on Mar 10, 2018 8:45:23 GMT
I believe a number of genetic strains of aberrations have been kept up over a number of years in the past but they eventually fail due to inbreeding. It is notable that not many (Adam excepted) modern breeders today can keep these genetic strains going , if they get an unusual specimen, they do not breed from it because of its cash value and just pin it. Also it takes a lot of time and effort to selective breed which the old collectors were willing to put in and many bred most of their specimens and became very skilled in the process. Today its mostly man made aberrations that are made at the point of a needle, or in their fridge by cold shocking.
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Post by wollastoni on Mar 13, 2018 8:58:01 GMT
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Post by africaone on Mar 13, 2018 9:05:24 GMT
There is actually a breeder of Parnassius that keep an (probably more) aberrant lineage. More breeders (discrete or not) are also doing this in beetles (espacially in Cetonid family). And I am sure that many more are doing this. In many cases such lineages are kept for some years only. Such experiment are also made dayly in scientific environment to study genetic (the most known is Drosophila breeding).
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Post by wollastoni on Mar 13, 2018 9:32:30 GMT
Sure there are also dozens of Carabus breeders who select and develop some splendid forms.
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Post by jmg on Mar 13, 2018 10:29:19 GMT
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Post by bobw on Mar 14, 2018 9:05:13 GMT
It may not have been Henri who first produced the wiskotti form but it was certainly him and Vincent Pierrat who progressed if from slightly enlarged red spots towards the freaks that we see today. Many of you will also have seen Vincent's nomion with enlarged red spots at various European shows.
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Post by jmg on Mar 14, 2018 13:27:28 GMT
In 1888, Honrath first recorded an aberrant female captured in the 1860s in Gotland. In 1891, Oberthür mistakenly named wiskotti for a Jura subspecies. It was in 1989 that Bengtsson et al. published an article on Gotland as the origin of wiskotti. In 1994, Descimon captures specimens on Gotland: 2 male wiskotti on 200 ccollected specimens. 1995, beginning of the crossings by Descimon and Pierrat. See: H. Descimon & V. Pierrat, "Genetic control of wing design in Lepidoptera: the case of Parnassius apollo Linnaeus, 1758", Lepidoptères, No. 66, vol. 26 (2017). Below is a picture from a wiskotti farm (for obvious reasons, I can not specify the place): photos.google.com/album/AF1QipPpcYyeUh6OBzEgofPcBDkZvKWkXdDiurnKzXJU/photo/AF1QipMIkx_qCKNhOgEcRVvx0xmpBqO84FFmAwNHCP7y |
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Post by jmg on Mar 14, 2018 14:12:26 GMT
Could this specimen (on the right) give birth (unless he is the heir) to a genetic modification? It is a shame that its precise location of capture is unknown ( Parides aeneas bought in Juvisy)!   photos.google.com/album/AF1QipOs3OoAUVZg-l-TJ5YQeMPYF8flB-6TsikHN8pd By the way, please explain to me how to insert a link to a photo (placed on a website) showing the photo on this ICF same page. Yeah, I'm trying to use the "insert image" button. In vain !! Sorry! |
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Post by Adam Cotton on Mar 14, 2018 14:43:05 GMT
Strange, using the "insert image" button should work. Perhaps there is some issue when linking directly to a Google photos stored picture. It may be being blocked by the Google photos server.
Adam.
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