The ‘A’ genome donor of Eleusine coracana (L.) Gaertn. (Gramineae)

Hiremath, S. C.; Salimath, S. S.

doi:10.1007/bf00224180

Cited by 43 publications

(32 citation statements)

References 14 publications

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“…The infrageneric classification of this small genus always remained controversial and species like E. compressa and E. multiflora kept shifting from one genus to another (Hilu, 1981). Genome donors to various polyploid species also, more or less, remained unknown, despite various cytogenetical and molecular investigations (Chennaveeraiah and Hiremath, 1974;Hilu and deWet, 1976;Hilu, 1988;Hiremath and Salimath, 1992;Salimath et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

Mapping of rDNA on the chromosomes of Eleusine species by fluorescence in situ hybridization.

Bisht

Mukai

2000

Genes Genet. Syst.

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Mapping of rDNA sites on the chromosomes of four diploid and two tetraploid species of Eleusine has provided valuable information on genome relationship between the species. Presence of 18S-5.8S-26S rDNA on the largest pair of the chromosomes, location of 5S rDNA at four sites on two pairs of chromosomes and presence of 18S-5.8S-26S and 5S rDNA at same location on one pair of chromosomes have clearly differentiated E. multiflora from rest of the species of Eleusine. The two tetraploid species, E. coracana and E. africana have the same number of 18S-5.8S-26S and 5S rDNA sites and located at similar position on the chromosomes. Diploid species, E. indica, E. floccifolia and E. tristachya have the same 18S-5.8S-26S sites and location on the chromosomes which also resembled with the two pairs of 18S-5.8S-26S rDNA locations in tetraploid species, E. coracana and E. africana. The 5S rDNA sites on chromosomes of E. indica and E. floccifolia were also comparable to the 5S rDNA sites of E. africana and E. coracana. The similarity of the rDNA sites and their location on chromosomes in the three diploid and two polyploid species also supports the view that genome donors to tetraploid species may be from these diploid species.

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Section: Introductionmentioning

confidence: 99%

Mapping of rDNA on the chromosomes of Eleusine species by fluorescence in situ hybridization.

Bisht

Mukai

2000

Genes Genet. Syst.

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“…E. indica, E. tristachya, and E. Jloccifolia, may possess the "A" and the differentiated forms of "A" genome, whereas one species, E. multi-,flora, possesses a distinct "C" genome. None of the species studied so far are known to possess the "B" genome (HIREMATH and SALIMATH 1992).…”

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confidence: 99%

“…The genomic homology and differentiation pattern were assessed based upon the crossability, degree of meiotic chromosome pairing, and fertility factors in species and their hybrids. ( HIREMATH and SALIMATH 1992). Young hermaphrodite florets of pistil parents were emasculated and hand pollinated with the pollen of the desired male parent.…”

mentioning

confidence: 99%

Genome Differentiation Patterns in Diploid Species of Elemine (Poaceae)

2004

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Three species of Eleusine viz. E. indica, E. tristachya (both annual), and E. floccifolia (perennial)are wild diploid taxa (x = 9) that display nine bivalents at diakinesis/metaphase I of meiosis and high pollen fertility and seed set. Interspecific F1 hybrids, E. indica ×E. floccifolia and E. tristachya ×E. indica, were analysed to investigate species genome affinity and crossing barriers. In E. indica ×E. floccifolia F1, the mean chromosome pairing was 0.38I + 8.78II + 0.008III + 0.004IV, and nearly 81% of the pollen mother cells contained nine bivalents, suggesting that genomes of E.indica and E. floccifolia are homologous/similar. Despite the regular meiosis, F1s were seed sterile. In E. tristachya × E. indica F1, the mean chromosome pairing was 0.191 8.87II % 0.0IIV, and about 89% of the pollen mother cells exhibited nine bivalents, and the F1s were partially fertile, indicating that genomes of E. tristachya and E. indica are also largely homologous. These pieces of cytogenetic information suggest that these three diploid species form a close genetic assemblage within the genus Eleusine. Barriers for gene exchange between these taxa, in nature, are discussed considering the available literature.

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“…This is also true at the supra-generic level, where its closest allies are disputed (Clayton and Renvoize, 1986). Therefore, some studies have used a comparative analysis of DNA markers in order to get greater knowledge of the interrelatedness of the Eleusine species (Gupta et al, 2010;Hiremath and Salimath, 1992;Salimath et al, 1995). Hiremath and Salimath (1992) used molecular markers to uncover the genetic affinities between Eleusine coracana and three diploid species (viz.…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, some studies have used a comparative analysis of DNA markers in order to get greater knowledge of the interrelatedness of the Eleusine species (Gupta et al, 2010;Hiremath and Salimath, 1992;Salimath et al, 1995). Hiremath and Salimath (1992) used molecular markers to uncover the genetic affinities between Eleusine coracana and three diploid species (viz. Eleusine indica, Eleusine floccifolia, and Eleusine tristachya), which are believed to form a close genetic assemblage within the genus.…”

Section: Discussionmentioning

confidence: 99%