IBONE   05434
INSTITUTO DE BOTANICA DEL NORDESTE
Unidad Ejecutora - UE
artículos
Título:
Harnessing apomictic reproduction in grasses: what we have learned from Paspalum
Autor/es:
ORTIZ JPA; QUARIN CL; PESSINO SC; ACUÑA C; MARTÍNEZ EJ; ESPINOZA F; HOJSGAARD D; SARTOR M; CÁCERES ME; PUPILLI F
Revista:
ANNALS OF BOTANY
Editorial:
OXFORD UNIV PRESS
Referencias:
Lugar: Oxford; Año: 2013 p. 1 - 21
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 vigor. 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 sexuality, 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 how sexual crop species might escape from dosage effects in the endosperm. ? Scope In this article, we critically review the available literature characterizing apomixis in Paspalum spp. and its use in breeding. In particular, we compare across species the structure and function of the genomic region controlling apomixis to identify a common core region shared by all apomictic Paspalum species and where apomixis genes are likely to be localized. ? Conclusions We will discuss some possible candidate genes for apomixis and strategies to develop a system to introduce the trait into major crops.