Cytological and Interfertility Relationships of Arachis Section Arachis

Stalker, H. T.; Dhesi, J. S.; Parry, D. C.; Hahn, Jong Hoon

doi:10.1002/j.1537-2197.1991.tb15751.x

Cited by 37 publications

(29 citation statements)

References 12 publications

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“…"A" chromosomes are exclusive of section Arachis. Furthermore, the hybrids between A. duranensis (section Arachis) x A. chiquitana obtained by STALKER et al (1991) have shown 54% of pollen staining and a bivalent average pairing of 9,97 and of 18,52 chiasmas per PMC. This is indicating a high affinity between both species.…”

Section: Resultsmentioning

confidence: 99%

Chromosome studies in wild Arachis(Leguminosae)

Lavia

2000

Caryologia

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have 2n=20. SAT chromosomes were analysed for all species and a new type of satellited chromosome was described for the genus, which was named 3B for its close resemblance to the first described 3 type. "A" chromosomes were only found in A. Herzogii, A. Simpsonii and A. chiquitana from all the studied species. The last one belong to the section Procumbentes, however, the type of satellited chromosome and the presence of "A" chromosomes in its karyotype suggest that it should be moved from section Procumbentes. The presence of "A" chromosomes proves that it belongs to the section Arachis.

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Section: Resultsmentioning

confidence: 99%

Chromosome studies in wild Arachis(Leguminosae)

Lavia

2000

Caryologia

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“…4. Further, a principal component analysis using karyotypic data grouped taxa into three distinct clusters which were equidistant from each other [13]. [9,12].…”

Section: Discussionmentioning

confidence: 99%

Use of single-primer DNA amplifications in genetic studies of peanut (Arachis hypogaea L.)

et al. 1992

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A recent approach to detecting genetic polymorphism involves the amplification of genomic DNA using single primers of arbitrary sequence. When separated electrophoretically in agarose gels, the amplification products give banding patterns that can be scored for genetic variation. The objective of this research was to apply these techniques to cultivated peanut (Arachis hypogaea L.) and related wild species to determine whether such an approach would be feasible for the construction of a genetic linkage map in peanut or for systematic studies of the genus. Two peanut cultivars, 25 unadapted germplasm lines of A. hypogaea, the wild allotetraploid progenitor of cultivated peanut (A. monticola), A. glabrata (a tetraploid species from section Rhizomatosae), and 29 diploid wild species of Arachis were evaluated for variability using primers of arbitrary sequence to amplify segments of genomic DNA. No variation in banding pattern was observed among the cultivars and germplasm lines of A. hypogaea, whereas the wild Arachis species were uniquely identified with most primers tested. Bands were scored (+/-) in the wild species and the PAUP computer program for phylogenetic analysis and the HyperRFLP program for genetic distance analysis were used to generate dendrograms showing genetic relationships among the diploid Arachis species evaluated. The two analyses produced nearly identical dendrograms of species relationships. In addition, approximately 100 F2 progeny from each of two interspecific crosses were evaluated for segregation of banding patterns. Although normal segregation was observed among the F2 progeny from both crosses, banding patterns were quite complex and undesirable for use in genetic mapping. The dominant behavior of the markers prevented the differentiation of heterozygotes from homozygotes with certainty, limiting the usefulness of arbitrary primer amplification products as markers in the construction of a genetic linkage map in peanut.

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“…The perennial species of the section Arachis have 20 chromosomes, including Husted's A pair and show more similarity and better crossability to each other than those that do not have the A pair, generally being classified as the A genome species (Stalker, 1989; Stalker et al, 1991). The same applies to the annual A. duranensis and A. stenosperma Krapov.…”

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Study of the Evolution of Cultivated Peanut through Crossability Studies among Arachis ipaënsis, A. duranensis, and A. hypogaea

et al. 2006

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Genus Arachis L. includes 80 described species, of which 31 belong to section Arachis, including the two diploid species A. ipaënsis Krapov. and W.C. Gregory and A. duranensis Krapov. and W.C. Gregory, considered the putative B and A genome parents of the cultivated peanut. This work contributes to the study of evolution of the peanut (Arachis hypogaea L.), based on the successful hybridization between A. ipaënsis and A. duranensis, chromosome doubling of the hybrid, and crosses between the synthetic amphidiploid and representatives of the diversity of the crop. Diploid hybrids between A. ipaënsis and A. duranensis, confirmed by molecular markers, had pollen stains of 0.98%. Colchicine‐induced tetraploids were confirmed by mitotic chromosome counts. Progeny from these amphidiploid plants had a 97.74% pollen stain and significant differences among structure sizes measured in diploid and tetraploid flowers. Hybrid individuals [A. hypogaea × (A. ipaënsis × A. duranensis)4x] were produced from crosses involving all six botanical varieties of A. hypogaea. These hybrids indicate the evolutionary similarity between the wild species and the cultigen. The successful hybridization between diploid species A. ipaënsis and A. duranensis and between A. hypogaea and the synthetic amphidiploid support the theory that these two diploids are the parents of the cultivated peanut. Resulting materials are of great importance to peanut breeding.

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Cytological and Interfertility Relationships of Arachis Section Arachis

Cited by 37 publications

References 12 publications

Chromosome studies in wild Arachis(Leguminosae)

Chromosome studies in wild Arachis(Leguminosae)

Use of single-primer DNA amplifications in genetic studies of peanut (Arachis hypogaea L.)

Study of the Evolution of Cultivated Peanut through Crossability Studies among Arachis ipaënsis, A. duranensis, and A. hypogaea

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