Cytogenetical Studies in Wild and Cultivated Species of<i>Eleusine</i>(Gramineae)

Hiremath, S. C.; Chennaveeraiah, M. S.

doi:10.1080/00087114.1982.10796921

Cited by 28 publications

(14 citation statements)

References 20 publications

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“…At morphological level the raceme type inflorescence is quite distinct from the characteristic digitate type inflorescence of the genus Eleusine (Phillips 1972). The chromosome number, 2n = 16, with basic chromosome number, x = 8, also separates E. multiflora from rest of the species which have basic chromosome number, x = 9 (Hiremath and Chennaveeraiah, 1982). E. multiflora is the only species where the 18S-5.8S-26S rDNA was observed on the largest pair of chromosomes.…”

Section: Discussionmentioning

confidence: 93%

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: Discussionmentioning

confidence: 93%

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. coracana, E. africana and E. kigeziensis. The species are grown in the wild except E. coracana, which is commonly known as finger millet and has been domesticated for cultivation in several parts of Africa and South Asia (Phillips 1972, Hiremath andChennaveeraiah 1982). In India it is cultivated as a minor millet crop in dry areas of the Karnataka, Andhra Pradesh and Tamilnadu provinces in the South and Uttar Pradesh and Himachal Pradesh in the North.…”

mentioning

confidence: 99%

“…E. coracana is an allotetraploid species and is based on the basic chromosome number of 9 (2nϭ4xϭ36) with a probable genome constitution of AABB. The diploid species E. indica (2nϭ2xϭ18) is known to be the donor of the A genome to this species Hiremath 1974a, Hiremath andSali-math 1992) while the identity of diploid species contributing the B genome is still elusive (Hiremath and Salimath 1992). On the other hand a few more diploid species namely E. floccifolia, E. intermedia, E. tristachiya, all based on xϭ9 (2nϭ2xϭ18) are reported to have contributed in the evolution of E. coracana (Bisht andMukai 2001, 2002).…”

mentioning

confidence: 99%

Genome Analysis of Finger Millet E. coracana by Interspecific Hybridization among Diploid Wild Species of Eleusine (Poaceae)

Devarumath¹,

Hiremath²,

Rao³

et al. 2005

CYTOLOGIA

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Four species of Eleusine viz. E. intermedia, E. floccifolia, E. indica and E. tristachya are wild diploid taxa (2nϭ2xϭ18) and are presumed to have contributed to the evolution of finger millet, E. coracana, the amphidiploid with AABB genome (2nϭ2xϭ36) and an important minor millet grown in Africa and South Asia. E. indica is known to have contributed the A genome to E. coracana, while the information regarding the other genome donor species is not forthcoming. The present investigations were undertaken to clearly understand the genome homology of 3 species viz. E. intermedia, E. floccifolia and E. tristachya vis-à-vis the A genome of E. indica and to analyze the interspecific relationship among these diploid species and their possible contribution to the evolution of E. coracana. Interspecific F 1 hybrids of E. intermediaϫE. indica, E. intermediaϫE. floccifolia and E. tristachyaϫE. intermedia were produced and studied for morphological and cytological details. The experimental data revealed a high degree of homology at the interspecific level among all 4 species resulting in high frequency of bivalents and a very low frequency of univalents and multivalents. Inspite of good chromosome pairing and bivalent formation, a significant reduction in pollen stainability (8-32%) has been recorded in the F 1 hybrids. The data obtained on chromosome associations at diakinesis/ metaphase I of meiosis suggest that these diploid species form a close genetic assemblage within the genus Eleusine. Various factors affecting the pollen stainability and seed fertility are discussed in the light of available information on the subject.

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“…The genus Eleusine contains about 10 species, both annuals and perennials, with three basic chromosome numbers 8, 9, and 10. Four are tetraploids, namely, E. coracana (2n = 4x = 36, AABB), Eleusine africana (2n = 4x = 36, AABB) and Eleusine kigeziensis (2n = 4x = 36, AADD), and Eleusine reniformis (2n = 4x = 36); Seven are diploids with a basic chromosome number of 8 in Eleusine multiflora (2n = 2x = 16, CC), 9 in Eleusine indica (2n = 2x = 18, AA), Eleusine tristachya (2n = 18, AA), Eleusine floccifolia (2n = 18, BB), Eleusine intermedia (2n = 18, AB), and Eleusine verticillata (2n = 2x = 18), and 10 in Eleusine jaegeri (2n = 2x = 20, DD) (Hiremath and Chennaveeraiah, 1982;Neves et al, 2005;Dwivedi et al, 2012). E. coracana subsp.…”

Section: Finger Milletmentioning

confidence: 99%

Finger and foxtail millets

Vetriventhan

Upadhyaya

Dwivedi

et al. 2016

Genetic and Genomic Resources for Grain Cereals Improvement

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Cytogenetical Studies in Wild and Cultivated Species ofEleusine(Gramineae)

Cited by 28 publications

References 20 publications

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

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

Genome Analysis of Finger Millet E. coracana by Interspecific Hybridization among Diploid Wild Species of Eleusine (Poaceae)

Finger and foxtail millets

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