Genome Organisation and Evolution in the Genus Vicia

Raina, S. N.

doi:10.1016/b978-0-12-402960-6.50017-2

Cited by 25 publications

(10 citation statements)

References 45 publications

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“…If we make the assumption that the 13 diploid and the polyploid species belong to two different DNA groups, then the DNA interval will be 2.25 pg. This value is similar to the DNA intervals reported for Clarkia (2.15 pg;Narayan, 1985), Nicotiana (1.95 pg;Narayan, 1987) and Vicia (2.20 pg; Raina, 1989). It is not possible at present to conclude whether the DNA distribution in Vigna is discontinuous as in other plant genera.…”

Section: The Distribution Of Dna Changes Between the Complementssupporting

confidence: 73%

“…Investigations in Lathyrus (Narayan, 1982;Narayan & Durrant, 1983), Vicia (Raina & Rees, 1983a, 1983bRaina, 1989 and Allium (Narayan, 1988a) have shown that the extra DNA acquired during evolution was distributed evenly over all chromosomes irrespective of the large changes in chromosome size. The chromosomes of V. lancifolia (2.13 pg), V. radiata (2.67 pg) and V. bered 1 to 11.…”

Section: The Distribution Of Dna Changes Within the Complementsmentioning

confidence: 99%

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Quantitative DNA variation between and within chromosome complements of Vigna species (Fabaceae)

1990

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Cytogenetical investigations, so far, on the organisation and evolution of the genomes of Vigna species have proved difficult due to small chromosome size, large chromosome number and uniformity in chromosome shape and size within and between the complements. In this investigation the nature and extent of DNA variation between thirteen diploid and one polyploid species have been estimated. The DNA variation between diploid species was small and species clustered around a mean value of 2.7 pg. The polyploid species had a greater DNA value of 4.95 pg. No significant variation in 2C DNA content was found between accessions of V. radiata. A comparison of the distribution of DNA among the chromosomes within complements has shown that the excess DNA acquired in evolution was distributed evenly in all chromosomes despite significant differences in chromosome size. The relative changes in chromatin area and DNA density which accompany evolutionary DNA variation was also compared.

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Section: The Distribution Of Dna Changes Between the Complementssupporting

confidence: 73%

Section: The Distribution Of Dna Changes Within the Complementsmentioning

confidence: 99%

Quantitative DNA variation between and within chromosome complements of Vigna species (Fabaceae)

1990

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“…Genome size of a species is fairly stable and is an useful character in taxonomic and evolutionary studies (Price 1976;Ohri and Khoshoo 1986;Greilhuber and Ehrendorfer 1988;Raina 1990;Bennett and Leitch 1995;Bennett et al 2000). The 4C DNA content has been determined in 10 species of Dalbergia involving 30 collections (Table 2).…”

Section: Resultsmentioning

confidence: 96%

Genome size variation and evolution in some species ofDalbergiaLinn.f. (Fabaceae)

Hiremath

Nagasampige

2004

Caryologia

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The present study deals with the extent of genome size variation and evolution in some species of Dalbergia. The interspecific 4C DNA content variation has been analyzed in 30 accessions belonging to ten species of Dalbergia. The 4C DNA content in ten Dalbergia species ranges from 5.85 pg in D. lanceolaria to 7.88 pg in D. horrida, about 1.3 fold variation is apparent at a constant chromosome number 2n=2x=20. ANOVA test reveals significant variation between species. Like other woody angiospermic taxa, tree species of Dalbergia exhibit small genome size ranging from 5.85 pg in D. lanceolaria to 7.22 pg in D. sissoides. In contrast, the shrubs and climbers of this genus also reveal a narrow range of genome size variation from 7.36 pg in D. rubiginosa to 7.88 pg in D. horrida The climber species of this genus exhibits higher DNA amount than the tree species. The present investigation indicate that lianas or climber species of Dalbergia have evolved from tree species through evolutionary increase in genome size. The extent of DNA amount differences between the Dalbergia species has been discussed in the light of their interrelationships and diversity.

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“…Although differences in basic chromosome numbers within a genus can be due to events such as centric fusion, fissions or whole chromosome duplications (Quiros et a!., 1987;Saideswara et al, 1989;Raina, 1990) The case of probes UMC4 and UMC137 illustrates the probable rapid molecular evolution within the maize genome subsequent to duplication. Although these probes were found to fall within a cluster of loci on the maize 2L chromosome arm which is known to be duplicated on chromsome 7L, they do not seem to map the latter portion, probably due to loss of homology.…”

Section: Discussionmentioning

confidence: 99%

Comparative genome mapping of sugar cane with other species within the Andropogoneae tribe

et al. 1994

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Comparative mapping within the tribe Andropogoneae has recently progressed with the development of mapped maize genomic probes that can be used for sorghum and sugar cane genomes. In the present study, data from previous reports were used to locate various linkage groups of sugar cane and sorghum on the genomic map of maize. Syntenic genome regions in the three plants were determined according to existing bridge-loci. The distribution of these synteny clusters closely matched the duplication pattern in maize. In several cases, the two arms of a single maize chromosome corresponded to at least two synteny clusters. There seem to be common chromosome rearrangements between maize and sugar cane and between maize and sorghum. In this respect, sugar cane and sorghum appear to be more closely related than either one with maize. A more detailed analysis of two synteny clusters was undertaken using recent sugar cane data to compare gene orders and recombination rates of the three plants. The three genomes showed colinearity in these regions. Distances between genes were similar in maize and sorghum, whereas sugar cane tended to display less recombination, at least in the varietal progeny investigated.

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Genome Organisation and Evolution in the Genus Vicia

Cited by 25 publications

References 45 publications

Quantitative DNA variation between and within chromosome complements of Vigna species (Fabaceae)

Quantitative DNA variation between and within chromosome complements of Vigna species (Fabaceae)

Genome size variation and evolution in some species ofDalbergiaLinn.f. (Fabaceae)

Comparative genome mapping of sugar cane with other species within the Andropogoneae tribe

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