Karyotypes, C-banding and nucleolar numbers inGuizotia (Compositae)

Dagne, Kifle

doi:10.1007/bf00982319

Cited by 14 publications

(18 citation statements)

References 8 publications

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“…schimperi and G. villosa reported by Dagne (2001) might exist between some of the cultivated forms. On the other hand, the karyotypes, C-banding and nucleolar numbers study made by Dagne (1995) agrees with the ITS data by placing G. villosa to G. scabra ssp. scabra than to G. scabra ssp.…”

Section: Discussionsupporting

confidence: 80%

“…schimperi to be the wild progenitor of G. abyssinica, the cultivated species. and Dagne (1995) concluded that G. scabra ssp. scabra and G. scabra ssp.…”

Section: Introductionmentioning

confidence: 98%

“…schimperi. The study on chromosome morphology of Dagne (1995) placed G. villosa to G. scabra ssp. scabra partly supporting Baagøe (1974) but still differing from her in the position and origin of G. zavattarii.…”

Section: Introductionmentioning

confidence: 99%

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Molecular phylogeny of genus Guizotia (Asteraceae) using DNA sequences derived from ITS

Bekele

Geleta

Dagne

et al. 2006

Genet Resour Crop Evol

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Complete sequences for the internal transcribed spacers of the 18s-26s nuclear ribosomal DNA were generated to establish phylogenetic relationships among five species of the genus Guizotia. Parsimony analysis and pairwise distance data produced a single tree with four clearly distinguished clades that accord with previously reported chromosomal data. The clades produced here have been discussed with reference to existing taxonomic treatments. It appears that Guizotia scabra, ssp. scabra G. scabra ssp. schimperi and Guizotia villosa have contributed to the origin of Guizotia abyssinica, the cultivated species of the genus. The present composition of the species of genus Guizotia and the subtribe the genus presently placed in are suggested to be redefined.

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Section: Discussionsupporting

confidence: 80%

“…schimperi to be the wild progenitor of G. abyssinica, the cultivated species. and Dagne (1995) concluded that G. scabra ssp. scabra and G. scabra ssp.…”

Section: Introductionmentioning

confidence: 98%

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Molecular phylogeny of genus Guizotia (Asteraceae) using DNA sequences derived from ITS

Bekele

Geleta

Dagne

et al. 2006

Genet Resour Crop Evol

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“…Niger is the only domesticated species of the small exclusively diploid genus, Guizotia Cass. It is an economically important oilseed crop species with 2n=30 chromosomes (Hiremath and Murthy 1992;Dagne 1995). This crop is widely cultivated particularly in Ethiopia but also in India (Riley and Belayneh 1989;Hiremath and Murthy 1992).…”

Section: Introductionmentioning

confidence: 99%

“…Baag. based on evidences from phytogeography, cytogenetics and morphology (Baagøe 1974;Hiremath and Murthy 1988;Murthy et al 1993;Dagne 1994;Dagne 1995;Dagne 2001).…”

Section: Introductionmentioning

confidence: 99%

Genetic diversity of Guizotia abyssinica (L. f.) Cass. (Asteraceae) from Ethiopia as revealed by random amplified polymorphic DNA (RAPD)

Geleta

Bryngelsson

Bekele

et al. 2006

Genet Resour Crop Evol

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Genetic diversity of 70 populations of niger (Guizotia abyssinica) representing all its growing regions in Ethiopia was investigated using random amplified polymorphic DNA (RAPD) to reveal the extent of its populations genetic diversity. Ninety-seven percent of the loci studied was revealed to be polymorphic for the whole data set. The within population diversity estimated by Shannon diversity index and Nei gene diversity estimates was revealed to be 0.395 and 0.158, respectively. The extent of genetic variation of populations from major niger producing regions was significantly lower than that of populations from other regions; however, it is distributed regardless of altitude of growth. Genetic differentiation between populations was estimated with Shannon index as G 0 ST (0.432), Nei's G ST (0.242) and AMOVA based F ST (0.350) and appears to be equivalent to the average values calculated from various RAPD based studies on outcrossing species. Higher proportion of the variation detected by AM-OVA resided within populations (64.58%) relative to the amount of variation among populations (35.42%).UPGMA cluster analysis showed that most of the populations were clustered according to their region of origin. However, some populations were genetically distant from the majority and seem to have unique genetic properties. It is concluded that the crop has a wide genetic basis that may be used for the improvement of the species through conventional breeding and/or marker assisted selection. Collection of germplasm from areas not yet covered and/or underrepresented is the opportunity to broaden the genetic basis of genebank collection.

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Comparative analysis of genetic relationship and diagnostic markers of several taxa of Guizotia Cass. (Asteraceae) as revealed by AFLPs and RAPDs

et al. 2007

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Karyotypes, C-banding and nucleolar numbers inGuizotia (Compositae)

Cited by 14 publications

References 8 publications

Molecular phylogeny of genus Guizotia (Asteraceae) using DNA sequences derived from ITS

Molecular phylogeny of genus Guizotia (Asteraceae) using DNA sequences derived from ITS

Genetic diversity of Guizotia abyssinica (L. f.) Cass. (Asteraceae) from Ethiopia as revealed by random amplified polymorphic DNA (RAPD)

Comparative analysis of genetic relationship and diagnostic markers of several taxa of Guizotia Cass. (Asteraceae) as revealed by AFLPs and RAPDs

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