LAVIA graciela ines
Chromosome diversity in species of the genus Arachis, revealed by FISH and CMA/DAPI banding, and inferences about their karyotype differentiation
SILVESTRI, M.C.; ORTIZ, A.M.; ROBLEDO, G.; LAVIA, G.I.
ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS.
ACAD BRASILEIRA DE CIENCIAS
Lugar: Rio de Janeiro; Año: 2019
The species of the genus Arachis (Leguminosae) are ordered into nine sections. Theassignment of genome types in this genus has been based on cross-compatibility analysisand molecular cytogenetic studies. The latter has also allowed karyotypically establishingwell-defined genomes and reassigning the genome of several species. However, most ofthese studies have been focused mainly on the sections Arachis and Rhizomatosae. Toincrease the knowledge about the chromosome diversity of the whole genus, here weperformed a detailed karyotype characterization of representative species of most of thesections and genomes of Arachis. This characterization included chromosome morphology,CMA/DAPI chromosome banding, and chromosome marker localization (rDNA loci andone satDNA sequence) by fluorescent in situ hybridization (FISH). Based on the dataobtained and other previously published data, we established the karyotype similarities bycluster analysis and defined eleven karyotype groups. The grouping was partly coincidentwith the traditional genome assignment, except for some groups and some individualspecies. Karyotype similarities among some genomes were also found. The maincharacteristics of each karyotype group of Arachis were summarized. Together, our resultsprovide information that may be beneficial for future cytogenetic and evolutionary studies,and also contribute to the identification of interspecific hybrids.