INVESTIGADORES
ESPINOZA francisco
artículos
Título:
Harnessing apomictic reproduction in grasses: what we have learned from Paspalum.
Autor/es:
ORTIZ, J. P. A.; QUARIN CL; PESSINO SC; ACUÑA CA; MARTINEZ, EJ; ESPINOZA, F; HOJSGAARD D; SARTOR, M. E.; CACERES ME; PUPILLI, F
Revista:
ANNALS OF BOTANY
Editorial:
OXFORD UNIV PRESS
Referencias:
Lugar: Oxford; Año: 2013 vol. 112 p. 767 - 787
ISSN:
0305-7364
Resumen:
Background Apomixis is an alternative route of plant reproduction that produces individuals genetically identical to
the mother plant through seeds. Apomixis is desirable in agriculture, because it guarantees the perpetuation of superior
genotypes (i.e. heterotic hybrid seeds) by self-seeding without loss of hybrid vigour. The Paspalum genus, an
archetypal model system for mining apomixis gene(s), is composed of about 370 species that have extremely
diverse reproductive systems, including self-incompatibility, self-fertility, full sexual reproduction, and facultative
or obligate apomixis. Barriers to interspecific hybridization are relaxed in this genus, allowing the production of new
hybrids from many different parental combinations. Paspalum is also tolerant to various parental genome contributions
to the endosperm, allowing analyses of howsexually reproducing crop species might escape fromdosage effects
in the endosperm.
to the endosperm, allowing analyses of howsexually reproducing crop species might escape fromdosage effects
in the endosperm.
archetypal model system for mining apomixis gene(s), is composed of about 370 species that have extremely
diverse reproductive systems, including self-incompatibility, self-fertility, full sexual reproduction, and facultative
or obligate apomixis. Barriers to interspecific hybridization are relaxed in this genus, allowing the production of new
hybrids from many different parental combinations. Paspalum is also tolerant to various parental genome contributions
to the endosperm, allowing analyses of howsexually reproducing crop species might escape fromdosage effects
in the endosperm.
to the endosperm, allowing analyses of howsexually reproducing crop species might escape fromdosage effects
in the endosperm.
the mother plant through seeds. Apomixis is desirable in agriculture, because it guarantees the perpetuation of superior
genotypes (i.e. heterotic hybrid seeds) by self-seeding without loss of hybrid vigour. The Paspalum genus, an
archetypal model system for mining apomixis gene(s), is composed of about 370 species that have extremely
diverse reproductive systems, including self-incompatibility, self-fertility, full sexual reproduction, and facultative
or obligate apomixis. Barriers to interspecific hybridization are relaxed in this genus, allowing the production of new
hybrids from many different parental combinations. Paspalum is also tolerant to various parental genome contributions
to the endosperm, allowing analyses of howsexually reproducing crop species might escape fromdosage effects
in the endosperm.
to the endosperm, allowing analyses of howsexually reproducing crop species might escape fromdosage effects
in the endosperm.
archetypal model system for mining apomixis gene(s), is composed of about 370 species that have extremely
diverse reproductive systems, including self-incompatibility, self-fertility, full sexual reproduction, and facultative
or obligate apomixis. Barriers to interspecific hybridization are relaxed in this genus, allowing the production of new
hybrids from many different parental combinations. Paspalum is also tolerant to various parental genome contributions
to the endosperm, allowing analyses of howsexually reproducing crop species might escape fromdosage effects
in the endosperm.
to the endosperm, allowing analyses of howsexually reproducing crop species might escape fromdosage effects
in the endosperm.
Apomixis is an alternative route of plant reproduction that produces individuals genetically identical to
the mother plant through seeds. Apomixis is desirable in agriculture, because it guarantees the perpetuation of superior
genotypes (i.e. heterotic hybrid seeds) by self-seeding without loss of hybrid vigour. The Paspalum genus, an
archetypal model system for mining apomixis gene(s), is composed of about 370 species that have extremely
diverse reproductive systems, including self-incompatibility, self-fertility, full sexual reproduction, and facultative
or obligate apomixis. Barriers to interspecific hybridization are relaxed in this genus, allowing the production of new
hybrids from many different parental combinations. Paspalum is also tolerant to various parental genome contributions
to the endosperm, allowing analyses of howsexually reproducing crop species might escape fromdosage effects
in the endosperm.
to the endosperm, allowing analyses of howsexually reproducing crop species might escape fromdosage effects
in the endosperm.
archetypal model system for mining apomixis gene(s), is composed of about 370 species that have extremely
diverse reproductive systems, including self-incompatibility, self-fertility, full sexual reproduction, and facultative
or obligate apomixis. Barriers to interspecific hybridization are relaxed in this genus, allowing the production of new
hybrids from many different parental combinations. Paspalum is also tolerant to various parental genome contributions
to the endosperm, allowing analyses of howsexually reproducing crop species might escape fromdosage effects
in the endosperm.
to the endosperm, allowing analyses of howsexually reproducing crop species might escape fromdosage effects
in the endosperm.
Paspalum genus, an
archetypal model system for mining apomixis gene(s), is composed of about 370 species that have extremely
diverse reproductive systems, including self-incompatibility, self-fertility, full sexual reproduction, and facultative
or obligate apomixis. Barriers to interspecific hybridization are relaxed in this genus, allowing the production of new
hybrids from many different parental combinations. Paspalum is also tolerant to various parental genome contributions
to the endosperm, allowing analyses of howsexually reproducing crop species might escape fromdosage effects
in the endosperm.
to the endosperm, allowing analyses of howsexually reproducing crop species might escape fromdosage effects
in the endosperm.
Paspalum is also tolerant to various parental genome contributions
to the endosperm, allowing analyses of howsexually reproducing crop species might escape fromdosage effects
in the endosperm.
? Scope In this article, the available literature characterizing apomixis in Paspalum spp. and its use in breeding is
critically reviewed. In particular, a comparison is made across species of the structure and function of the
genomic region controlling apomixis in order to identify a common core region shared by all apomictic Paspalum
critically reviewed. In particular, a comparison is made across species of the structure and function of the
genomic region controlling apomixis in order to identify a common core region shared by all apomictic Paspalum
Scope In this article, the available literature characterizing apomixis in Paspalum spp. and its use in breeding is
critically reviewed. In particular, a comparison is made across species of the structure and function of the
genomic region controlling apomixis in order to identify a common core region shared by all apomictic PaspalumPaspalum
species and where apomixis genes are likely to be localized. Candidate genes are discussed, either as possible
genetic determinants (including homologs to signal transduction and RNA methylation genes) or as downstream
factors (such as cell-to-cell signalling and auxin response genes) depending, respectively, on their co-segregation
with apomixis or less. Strategies to validate the role of candidate genes in apomictic process are also discussed,
with special emphasis on plant transformation in natural apomictic species.