Karyotypes of four species of South America natives and one cultivated species of<i>Lathyrus</i>L.

Battistin, Alice; Fernández, Amparo Ygual

doi:10.1080/00087114.1994.10797311

Cited by 30 publications

(30 citation statements)

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“…At the interspecific level, within section Lathyrus and Cicercula, some species can be distinguished clearly by their karyotype formulae, and when quantitative karyotype data are added, the majority of entities can be differentiated. The constancy in chromosome number observed in the species studied here and in those cited in the literature (Senn 1938, Battistin and Fernández 1994, Klamt and Schifino-Wittmann 2000, Seijo and Fernández 2003 indicates that numerical changes have not been important in the evolution of South American species, as noted for most of the entities of Lathyrus (Hitchcock 1952, Yamamoto et al 1984, Sahin et al 2000. However, this constancy differs from the situation described for North America, where several endemic polyploid species were found, so that North America was considered as a center of polyploid origin for Lathyrus (Broich 1989).…”

Section: Schifino-wittmann 2000)mentioning

confidence: 53%

“…᭡ϭSection Lathyrus; ϭsection: Clymenum, ᭹ϭSection Aphaca, ᭺ϭSection Cicercula. tulated (Narayan andDurrant 1983, Klamt andSchifino-Wittmann 2000) and that entities may be characterized by their chromosome features as was suggested by other authors (Yamamoto et al 1984, Murray et al 1992a, Battistin and Fernández 1994. In relation to the genome size variation, there are differences in the chromosome length among the studied taxa.…”

Section: Schifino-wittmann 2000)mentioning

confidence: 64%

“…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.…”

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confidence: 99%

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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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Section: Schifino-wittmann 2000)mentioning

confidence: 53%

Section: Schifino-wittmann 2000)mentioning

confidence: 64%

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confidence: 99%

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

Badr

2006

CYTOLOGIA

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“…Some authors claim that, in addition to the numerical chromosome constancy, species display uniformity in chromosome morphology (all chromosomes are metacentric or submetacentric). 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 1992.…”

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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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“…All species have 2n = 2x = 14 chromosomes, with the basic number being n = x = 7. Although there is no variation in chromosome number, there are variations in chromosome size, in centromere location, and in the number, size and location of secondary constrictions (Sharma and Datta, 1959;Roy and Singh, 1967;Federov, 1969;Fouzard and Tandon, 1975;Broich, 1989;Battistin and Fernández, 1994), and in DNA content, involving euchromatin and heterochromatin, as well as repetitive and non-repetitive DNA sequences (Lavania and Sharma, 1980;Narayan and Durrant, 1983;Kuryan and Narayan, 1987;Murray et al, 1992). Another important variation observed in these species is in the number and location of nucleolar organizer regions (NORs) (Nazeer et al, 1982;Murray et al, 1992;Battistin and Fernández, 1993).…”

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confidence: 99%

Chromosomal characterization of three native and one cultivated species of Lathyrus L. in Southern Brazil

1999

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Mitotic metaphase chromosomes and interphase nuclei of nine populations of three South American species of Lathyrus (L. pubescens, L. nervosus and L. crassipes) and six populations of the cultivated species L. odoratus were analyzed. All populations had 2n = 2x = 14 chromosomes. There were significant differences among populations within each species and among species in the number of metacentric, submetacentric and subtelocentric chromosomes, the number and location of secondary constrictions, chromosome length (longest and shortest), total haploid complement, arm ratio, and centromeric index. L. odoratus showed the highest tendency towards karyotype symmetry whereas the three South American species showed a moderate tendency towards asymmetry, with L. pubescens being the most asymmetrical. Silver staining was used to identify the nucleolar organizer regions (NORs) and the number of nucleoli per interphase nucleus in each species. In L. pubescens and L. nervosus, the NORs were located on the secondary constriction of the long arm of pair 7, in L. crassipes, the NOR was proximal being located in the pair of metacentric chromosomes, and in L. odoratus there were four terminal NORs on the short arms of pairs 4 and 5. The four species had a maximum of four nucleoli per interphase nucleus, indicating the presence of four regions with active ribosomal genes in each case.
Cromossomos em metáfases mitóticas e núcleos interfásicos em 9 populações de 3 espécies sul-americanas de Lathyrus (L. pubescens, L.nervosus e L.crassipes) e 6 populações da espécie cultivada L. odoratus foram analisados. Todas as populações apresentaram 2n = 2x = 14 cromossomos. As diferenças significativas observadas entre as populações dentro de cada espécie e entre as espécies foram: número de cromossomos metacêntricos, submetacêntricos e subtelocêntricos; número e localização das constrições secundárias; comprimento dos cromossomos (maior e menor); complemento total haplóide; razão braço longo/braço curto e índice centromérico. L. odoratus é a espécie com maior tendência simétrica em seu cariótipo, enquanto que nas três espécies sul-americanas os cariótipos têm tendência moderada para assimetria, sendo L. pubescens o mais assimétrico. Com nitrato de prata foi possível identificar as NORs e o número máximo de nucléolos por núcleo interfásico em cada espécie. Em L. pubescens e L. nervosus as NORs estão localizadas na constrição secundária do braço longo do par 7, em L. crassipes a NOR é proximal, localizada no par de cromossomos metacêntricos, e em L. odoratus foram observadas quatro NORs terminais nos braços curtos dos pares 4 e 5. As quatro espécies possuem número máximo de quatro nucléolos em cada núcleo interfásico, indicando quatro regiões com genes ribossomais ativos em cada espécie

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Karyotypes of four species of South America natives and one cultivated species ofLathyrusL.

Cited by 30 publications

References 15 publications

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

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

Genetic Variability in Lathyrus spp. as Revealed by Karyotype Analysis

Chromosomal characterization of three native and one cultivated species of Lathyrus L. in Southern Brazil

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