Application of Improved Technique in Tracing Karyotype Differences Between Strains of &lt;i&gt;Lathyrus odoratus&lt;/i&gt; L

Sharma, Arun Kumar; Datta, P. C.

doi:10.1508/cytologia.24.389

Cited by 21 publications

(7 citation statements)

References 11 publications

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“…For both species, there are discrepancies concerning the intraspecific stability versus variability of karyotype formula and meiotic behaviour (Bhattacharjee 1954;Sharma and Datta 1959;Verma and Ohri 1979;Murray et al 1992). However, most of these studies have been carried out using classical staining and have not gone further to provide additional evidences to support either the existence of karyotype formula stability or variability in Lathyrus species.…”

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confidence: 99%

Structural karyotypic variability and polyploidy in natural populations of the South American Lathyrus nervosus Lam. (Fabaceae)

et al. 2012

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Knowledge of the chromosome variation in wild populations is essential to understand the pathways and restrictions of karyotype evolution in plants. The aim of this study is to conduct an intraspecific analysis of the karyotypes by fluorochrome banding and ribosomal DNA (rDNA) loci detection by fluorescent in situ hybridization (FISH) and of the meiotic behaviour in natural populations of Lathyrus nervosus, sect. Notolathyrus. Chromosome banding showed that, despite the high constancy in the karyotype formula and in the rDNA loci among populations, there is intraspecific variation in the amount and distribution pattern of 4',6-diamidino-2-phenylindole (DAPI ? ) heterochromatin. However, those changes were not related to the total chromosome length of the haploid complements. This fact demonstrates that structural chromosome changes may be one of the most important mechanisms for karyotype variation among natural populations of L. nervosus. The chromosome number surveyed at the population level revealed the first case of polyploidy in South American species and the first case of uneven polyploidy of the genus. All the chromosome markers analysed indicated that the polyploids found originated by autopolyploidy. The meiotic analysis showed different chromosome abnormalities that may be generating numerical and structural changes in the sporads. The finding of unreduced gametes that are alive at anthesis suggests sexual polyploidization as the most probable mechanism involved in the origin of these 3x and 4x autopolyploid cytotypes in L. nervosus.

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Section: Introductionmentioning

confidence: 99%

Structural karyotypic variability and polyploidy in natural populations of the South American Lathyrus nervosus Lam. (Fabaceae)

et al. 2012

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“…However, others have found enough interspecific karyotype differences to allow species characterization (Yamamoto et al 1984, Murray et al 1992, Battistin and Fernández 1994). Such discrepancy was also observed at the infraspecific level, mainly in the widely studied L. odoratus L. and L. sativus L. (Bhattacharjee 1954, Sharma and Datta 1959, Verma and Ohri 1979, Murray et al 1992b. From a karyosystematic point of view, Yamamoto et al (1984) have noted that Old World species could be grouped according to their karyotype morphology and that some of them were coincident with the taxonomic sections proposed by Davis (1970).…”

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Karyotype Analysis and Chromosome Evolution in Species of Lathyrus (Fabaceae)

Badr

2006

CYTOLOGIA

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SummaryThe karyotypes of 21 accessions of Lathyrus L. belonging to 4 sections were investigated. Although all the species have a chromosome number of 2nϭ14, they could be differentiated by their karyotype formula and quantitative parameters of the karyotypes. Phenetic distance showed that in spite of the differences observed among entitied, they can be grouped in clusters that coincide with the taxonomic sections established by Kupicha and with the life cycle of the species. The section Clymenum can be distinguished by the presence of a subtelocentric pair. From an evolutionary point of view, variation in genome size, however, is congruent with morphological variation as well as with the life cycle.

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Genetic Variability in Lathyrus spp. as Revealed by Karyotype Analysis

et al. 2009

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SummaryThe genetic variability based on karyotype formula was studied for 40 accessions of genus Lathyrus. All accessions have 2nϭ14 chromosomes. Karyotype formula has a great uniformity among accessions of each species, suggesting interaspecific stability in Lathyrus species. Our data allowed the differentiation of several accessions among sections Lathyrus, Linearicarpus and Clymenum in number of m chromosome. The variation among section Lathyrus supports that section Lathyrus is not fully constant as has been postulated. Satellites were detected in a pair of chromosome in L. sativus (TUN and AFG). On the otherhand, B-chromosome was detected in L. sativus (USSR, BAN, CAN, and PAK) L. gorgoni (JOR) and L. annus (SYR). This finding may be due to the variation in DNA amount by increase in the non-repetitive sequence. The variation in size of chromosomes of the members of Lathyrus is associated with the evolution in the genus.

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Application of Improved Technique in Tracing Karyotype Differences Between Strains of <i>Lathyrus odoratus</i> L

Cited by 21 publications

References 11 publications

Structural karyotypic variability and polyploidy in natural populations of the South American Lathyrus nervosus Lam. (Fabaceae)

Structural karyotypic variability and polyploidy in natural populations of the South American Lathyrus nervosus Lam. (Fabaceae)

Karyotype Analysis and Chromosome Evolution in Species of Lathyrus (Fabaceae)

Genetic Variability in Lathyrus spp. as Revealed by Karyotype Analysis

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