INVESTIGADORES
SEIJO Jose Guillermo
capítulos de libros
Título:
Classical and Molecular Cytogenetics in Peanut and in Wild Species of Arachis
Autor/es:
J. G. SEIJO; ROBLEDO, G; ORTIZ A; LAVIA, G.I
Libro:
Genetics, Genomics and Breeding of Peanuts
Editorial:
CRC press of Taylor and Francis group
Referencias:
Año: 2014; p. 35 - 55
Resumen:
The progress that has been achieved
in understanding the chromosome complements of peanut and related wild species
is reviewed here. Chromosome markers developed by using fluorescent in situ hybridization
(FISH) with rDNA probes and fluorescent banding allowed the construction of the
first chromosome map in peanut and in some diploid taxa. They also revealed the
existence of different karyotype structures within section Arachis. Each group of species having different karyotype structure
was defined as having different genomes. FISH analysis together with Genomic in
situ hybridization allowed the differentiation of chromosomes from A. duranensis
and A. ipaensis, the two species involved in the origin of
cultivated peanut. The results obtained by these techniques also suggest that
the wild tetraploid A. monticola is
the direct ancestor of peanut and that the Norwest of Argentina and South of
Bolivia is the region from which the AABB tetraploids of section Arachis have
arisen.