Codominant inheritance of polymorphic color variants of Gracilaria domingensis (Gracilariales, Rhodophyta)
Autor(a) principal: | |
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Data de Publicação: | 1999 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Genetics and Molecular Biology |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47571999000100020 |
Resumo: | Agar is the most valuable phycocoloid in the world market. Currently, about half of its production is obtained from the red alga Gracilaria (Gracilariales, Rhodophyta). Consequently, this genus has been the subject of many studies worldwide. A common green color variant of G. domingensis (Kützing) Sonder ex Dickie was found in a natural population on the northeastern coast of Brazil. Crosses were performed to determine the mode of color inheritance. The results can be interpreted as the expression of a pair of codominant alleles, where the green and red phenotypes are homozygous, and the heterozygotes present a brownish color. Heterozygous tetrasporophytes, at least until they are 4-5 cm long, exhibit a parental influence on the female gametophyte, since the reddish-brown or greenish-brown color is dependent on the female parent color (red or green). Mixed reproductive phases, as well as specimens with patches of different colors bearing spermatangia or cystocarps, were observed in laboratory cultures. Gametophytes that resulted from in situ germination of meiospores were also observed, and could be easily detected when red or green gametophytes were grown on brown tetrasporophytes. |
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Codominant inheritance of polymorphic color variants of Gracilaria domingensis (Gracilariales, Rhodophyta)Agar is the most valuable phycocoloid in the world market. Currently, about half of its production is obtained from the red alga Gracilaria (Gracilariales, Rhodophyta). Consequently, this genus has been the subject of many studies worldwide. A common green color variant of G. domingensis (Kützing) Sonder ex Dickie was found in a natural population on the northeastern coast of Brazil. Crosses were performed to determine the mode of color inheritance. The results can be interpreted as the expression of a pair of codominant alleles, where the green and red phenotypes are homozygous, and the heterozygotes present a brownish color. Heterozygous tetrasporophytes, at least until they are 4-5 cm long, exhibit a parental influence on the female gametophyte, since the reddish-brown or greenish-brown color is dependent on the female parent color (red or green). Mixed reproductive phases, as well as specimens with patches of different colors bearing spermatangia or cystocarps, were observed in laboratory cultures. Gametophytes that resulted from in situ germination of meiospores were also observed, and could be easily detected when red or green gametophytes were grown on brown tetrasporophytes.Sociedade Brasileira de Genética1999-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47571999000100020Genetics and Molecular Biology v.22 n.1 1999reponame:Genetics and Molecular Biologyinstname:Sociedade Brasileira de Genética (SBG)instacron:SBG10.1590/S1415-47571999000100020info:eu-repo/semantics/openAccessPlastino,Estela M.Guimarães,MelinaMatioli,Sergio R.Oliveira,Eurico C.eng1999-06-02T00:00:00Zoai:scielo:S1415-47571999000100020Revistahttp://www.gmb.org.br/ONGhttps://old.scielo.br/oai/scielo-oai.php||editor@gmb.org.br1678-46851415-4757opendoar:1999-06-02T00:00Genetics and Molecular Biology - Sociedade Brasileira de Genética (SBG)false |
dc.title.none.fl_str_mv |
Codominant inheritance of polymorphic color variants of Gracilaria domingensis (Gracilariales, Rhodophyta) |
title |
Codominant inheritance of polymorphic color variants of Gracilaria domingensis (Gracilariales, Rhodophyta) |
spellingShingle |
Codominant inheritance of polymorphic color variants of Gracilaria domingensis (Gracilariales, Rhodophyta) Plastino,Estela M. |
title_short |
Codominant inheritance of polymorphic color variants of Gracilaria domingensis (Gracilariales, Rhodophyta) |
title_full |
Codominant inheritance of polymorphic color variants of Gracilaria domingensis (Gracilariales, Rhodophyta) |
title_fullStr |
Codominant inheritance of polymorphic color variants of Gracilaria domingensis (Gracilariales, Rhodophyta) |
title_full_unstemmed |
Codominant inheritance of polymorphic color variants of Gracilaria domingensis (Gracilariales, Rhodophyta) |
title_sort |
Codominant inheritance of polymorphic color variants of Gracilaria domingensis (Gracilariales, Rhodophyta) |
author |
Plastino,Estela M. |
author_facet |
Plastino,Estela M. Guimarães,Melina Matioli,Sergio R. Oliveira,Eurico C. |
author_role |
author |
author2 |
Guimarães,Melina Matioli,Sergio R. Oliveira,Eurico C. |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Plastino,Estela M. Guimarães,Melina Matioli,Sergio R. Oliveira,Eurico C. |
description |
Agar is the most valuable phycocoloid in the world market. Currently, about half of its production is obtained from the red alga Gracilaria (Gracilariales, Rhodophyta). Consequently, this genus has been the subject of many studies worldwide. A common green color variant of G. domingensis (Kützing) Sonder ex Dickie was found in a natural population on the northeastern coast of Brazil. Crosses were performed to determine the mode of color inheritance. The results can be interpreted as the expression of a pair of codominant alleles, where the green and red phenotypes are homozygous, and the heterozygotes present a brownish color. Heterozygous tetrasporophytes, at least until they are 4-5 cm long, exhibit a parental influence on the female gametophyte, since the reddish-brown or greenish-brown color is dependent on the female parent color (red or green). Mixed reproductive phases, as well as specimens with patches of different colors bearing spermatangia or cystocarps, were observed in laboratory cultures. Gametophytes that resulted from in situ germination of meiospores were also observed, and could be easily detected when red or green gametophytes were grown on brown tetrasporophytes. |
publishDate |
1999 |
dc.date.none.fl_str_mv |
1999-03-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47571999000100020 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47571999000100020 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1415-47571999000100020 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Genética |
publisher.none.fl_str_mv |
Sociedade Brasileira de Genética |
dc.source.none.fl_str_mv |
Genetics and Molecular Biology v.22 n.1 1999 reponame:Genetics and Molecular Biology instname:Sociedade Brasileira de Genética (SBG) instacron:SBG |
instname_str |
Sociedade Brasileira de Genética (SBG) |
instacron_str |
SBG |
institution |
SBG |
reponame_str |
Genetics and Molecular Biology |
collection |
Genetics and Molecular Biology |
repository.name.fl_str_mv |
Genetics and Molecular Biology - Sociedade Brasileira de Genética (SBG) |
repository.mail.fl_str_mv |
||editor@gmb.org.br |
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1752122377331802112 |