I've been reading the article: "Biological identifications through DNA barcodes" (Hebert et al, 2003), in the introduction, they explain that morphological based identification has four significant limitations, I found some articles that confirm three of them, but I cannot find any articles about "Genetic Variation".
I need an article that talks about issues that genetic variation could cause in morphological identification.
If you suggest me such articles, I'll be very thankful.
Hi Aref. Please go through the below mentioned papers by us, they can be useful for you:
1. Genetic relatedness provides support for a species complex of myxosporeans infecting the Indian major carp, Labeo rohita
2. Morphological, histopathological and molecular characterization of Thelohanellus theinensis n. sp. (Cnidaria: Myxosporea) infecting an Indian major carp, Labeo bata in a cold water wetland in Punjab (India).
To answer your question, several studies showed evidence for species differentiation identified by markers tracing speciation events at the genotype thet are not reflected in the usual diagnostic characters in some groups of ferns, such as the Asplenium nidus complex and the Asplenium normale complex to name only two. The reasons for the lack of correlation between speciation events and the establishment of morphological diagnostic features are complex. For example, reticulate evolution may cause the formation of intermediate forms that obscure the species differentiation using phenotypic data only. A similar pattern but totally different dynamics may be found in taxa that speciate only recently. Genetic markers may found them clearly segregated but phenotypic markers still show not clear distinction because of differences in the time intervals required to get the genotypic and phenotypic polymorphisms sorted. This is an interesting but still poorly understood issue that needs more attention.
Dear Aref,
there is no more/a lot more to say than Harald explained some days ago. But you asked for any article about the item. Maybe the attached one will be another useful example.
Article The Value of Molecular vs. Morphometric and Acoustic Informa...
I've been doing some work on conflicts between morphological and genetic identifications of species which you might find useful. These are the citations - you can get the full text of any you might be interested in on my research gate page.
Horsburgh, K.A., J. Orton, R.G. Klein. 2016. Beware the springbok in sheep’s clothing: How secure are the faunal identifications upon which we build our models? African Archaeological Review 33(4): 353-361
Horsburgh, K.A., J.V. Moreno-Mayar, A.L. Gosling. 2016. Revisiting the Kalahari debate in the highlands: ancient DNA provides new faunal identifiations at Sehonghong, Lesotho. Azania: Archaeological Research in Africa 51:295-306.
Horsburgh, K.A., J.V. Moreno-Mayar 2015. Molecular identification of sheep at Blydefontein Rock Shelter, South Africa. Southern African Humanities 27: 65-80
Dear Dr. Lieckfeldt,
Yes, exactly. I asked another thing. Thanks for your attention.
Dear Dr. Horsburgh,
Thank you very much. I'll check all of them as soon as possible.
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