Karyotype Analysis and Relationships Among Varieties of Arachis hypogaea L

  title={Karyotype Analysis and Relationships Among Varieties of Arachis hypogaea L},
  author={H. Thomas Stalker and R. D. Dalmacio},
Mitotic chromosomes of nine Arachis hypogaea L. cultivars plus A. monticola Krap. et Rig. were analyzed cytologically. The cultivars included representatives of the four botanical varieties of A. hypogaea. The objective of this investigation was to identify the chromosomes of cultivated peanuts and determine the variation among subspecies and varieties. The A. hypogaea chromosomes ranged in length between 1.44 and 4.17μm and were mostly metacentric. Variation was observed in the numbers of… Expand
Karyotypic studies in Arachis hypogaea L. varieties
The data suggest that all Arachis accessions present a very similar chromosomal complement and support the hypothesis of a monophyletic origin, and are highly symmetric since metacentric chromosomes are the most frequent. Expand
An analysis of the B genome speciesArachis batizocoi (Fabaceae)
The presence of translocations is the most likely cause of multivalent formation in A. batizocoi hybrids and Cytological evolution via translocations has apparently been an important mechanism for differentiation in the species. Expand
Study of the Evolution of Cultivated Peanut through Crossability Studies among Arachis ipaënsis, A. duranensis, and A. hypogaea
The successful hybridization between diploid spedes A. duranensis and A. hypogaea and the synthetic amphidiploid support the theory that these two diploids are the parents of the cultivated peanut. Expand
Genetic relationships between peanut and wild species ofArachis sect.Arachis (Fabaceae): Evidence from RAPDs
The investigation showed that RAPDs can be used to analyze both inter- and intraspecific variation in peanut species and indicated that A. duranensis was most closely related to the domesticated peanut and is believed to be the donor of the A genome. Expand
Isozyme variation and species relationships in peanut and its wild relatives (Arachis L. — Leguminosae)
None of the diploids included in this survey could be conclusively identified as donors of either the A or the B genome to the tetraploids, which may call into question the simple hypothesis that A. hypogaea originated from just two diploid species. Expand
Variation of isozyme patterns among Arachis species
The area of greatest interspecific genetic diversity was in Mato Grosso, Brazil; however, the probability of finding unique alleles from those observed in A. hypogaea was greatest in north, north-central, south and southeast Brazil. Expand
Utilizing Wild Species for Peanut Improvement
Peanut species were grouped into nine sections, but only taxa in section Arachis will hybridize with A. hypogaea, and appears to be in large blocks rather than as single genes, and new genotyping strategies should enhance utilization of wild peanut genetic resources. Expand
Comparative mapping in intraspecific populations uncovers a high degree of macrosynteny between A- and B-genome diploid species of peanut
The findings will contribute to understanding tetraploid peanut genome origin and evolution and eventually promote its genetic improvement, and newly developed EST-SSR markers will enrich current molecular marker resources in peanut. Expand
Putative genome donors ofArachis hypogaea (Fabaceae), evidence from crosses with synthetic amphidiploids
These results, in conjunction with evidence from morphological similarities, phytogeographical distribution and some phytochemical features, confirm the segmental amphidiploid origin of A. hypogaea. Expand
Molecular biogeographic study of recently described B- and A-genome Arachis species, also providing new insights into the origins of cultivated peanut.
From 2 to 30 alleles per locus were present, demonstrating section Arachis wild species variation of potential use for expanding the cultigen's genetic basis, and many RFLP markers diagnostic of A. batizocoi group specificity mapped to linkage group pair 2/12, suggesting selection or genetic control of chromosome pairing. Expand


Cytological Studies an the Peanut, Arachis. II
In that the chromosome number, morphology, and behavior of the bunch and runner peanuts are essentially similar, and the chromosomes of these two peanut types are seen to be homologous each to each notwithstanding minor changes that may have taken place, it is concluded that they have been derived from a common origin. Expand