INVESTIGADORES
SEIJO Jose Guillermo
capítulos de libros
Título:
Cytological features of peanut genome.
Autor/es:
SEIJO, J.G; SAMOLUK, S; SILVESTRI C; A. ORTIZ; CHALUP, L.; ROBLEDO, G; G.I. LAVIA
Libro:
Peanuts.
Editorial:
Science Publishers, Inc. NH and CRC press of Taylor and Francis group
Referencias:
Lugar: Boca Raton; Año: 2017; p. 27 - 60
Resumen:
2.Seijo J. G., SS Samoluk, A. Ortíz, C. Silvestri, L Chalup & G. Robledo, G. I. Lavia. 2016. Cytological features of peanut genome. In: Nalini Mallikarjuna and Rajeev Varshney (Eds.),Genetics , Genomics and Breeding of Peanuts. Science Publishers, Inc. NH and CRC press of Taylor and Francis group, Boca Raton. TITLE CHAPTER: CYTOLOGICAL FEATURES OF PEANUT GENOMEAbstractThis chapter aims to update the chromosomal features evaluated by classical and molecular cytogenetic techniques. These studies revealed significant variability within and among species of different sections and were very useful to unravel the taxonomy of the genus and to establish relationships between the wild species and the cultivated peanut. We describe examples in which chromosome markers contributes to take up genome characterization in Arachis species and to explain the origin of peanut and other tetraploids species. Based on the presence of six different arrangements of heterochromatin and rDNA loci, the A, B, D, F, G, and K genomes has been determined among diploid species of section Arachis. La Plata River Basin group species with A genome and A. ipaënsis from the B genome group are very close to A and B genome of A. hypogaea. Double genomic hybridization (GISH) experiments undoubtedly identified to A. duranensis as the A-genome donor of A. hypogaea. Both subspecies and all the botanical varieties of the cultigen had identical molecular cytogenetic markers patterns, suggesting that the same wild species participated in the origin; therefore this indicates that all these varieties and subspecies of peanut have arisen from a single allotetraploid population. Arachis monticola is revealed as the wild tetraploid from which peanut derived upon domestication. Cytogenetic data do not support the origin of rhizomatous tetraploids from the only diploid species of section Rhizomatosae and suggest that the group is not monophyletic, consequently the rhizomes may have arisen more than once in the genus.