Karyotype diversity analysis and nuclear genome size estimation for Pennisetum Rich. (Poaceae) ornamental grasses reveal genetic relationship and chromosomal evolution

Zhang, Yuan; Yuan, Xiaohuan; Teng, Wan; Chen, Chao; Liu, Hong; Wu, Juying

doi:10.1016/j.scienta.2015.06.018

Cited by 11 publications

(4 citation statements)

References 49 publications

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“…The distinction between Pennisetum and Cenchrus is not clearly defined, and several species that are now included in Cenchrus have previously been assigned to Pennisetum ( Donaldio et al, 2009 ; Chemisquy et al, 2010 ). Previous studies of Pennisetum have focused on isozymic classification, genetic diversity ( Tostain, 1994 ; Zhang et al, 2016b ), and chromosomes ( Martel et al, 2004 ; Techio et al, 2010 ; Zhang et al, 2015 ). However, these markers have low variation.…”

Section: Introductionmentioning

confidence: 99%

Comparative Analysis of the Chloroplast Genome for Four Pennisetum Species: Molecular Structure and Phylogenetic Relationships

Liu

Song

et al. 2021

Front. Genet.

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The genus Pennisetum (Poaceae) is both a forage crop and staple food crop in the tropics. In this study, we obtained chloroplast genome sequences of four species of Pennisetum (P. alopecuroides, P. clandestinum, P. glaucum, and P. polystachion) using Illumina sequencing. These chloroplast genomes have circular structures of 136,346–138,119 bp, including a large single-copy region (LSC, 79,380–81,186 bp), a small single-copy region (SSC, 12,212–12,409 bp), and a pair of inverted repeat regions (IRs, 22,284–22,372 bp). The overall GC content of these chloroplast genomes was 38.6–38.7%. The complete chloroplast genomes contained 110 different genes, including 76 protein-coding genes, 30 transfer RNA (tRNA) genes, and four ribosomal RNA (rRNA) genes. Comparative analysis of nucleotide variability identified nine intergenic spacer regions (psbA-matK, matK-rps16, trnN-trnT, trnY-trnD-psbM, petN-trnC, rbcL-psaI, petA-psbJ, psbE-petL, and rpl32-trnL), which may be used as potential DNA barcodes in future species identification and evolutionary analysis of Pennisetum. The phylogenetic analysis revealed a close relationship between P. polystachion and P. glaucum, followed by P. clandestinum and P. alopecuroides. The completed genomes of this study will help facilitate future research on the phylogenetic relationships and evolution of Pennisetum species.

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Section: Introductionmentioning

confidence: 99%

Comparative Analysis of the Chloroplast Genome for Four Pennisetum Species: Molecular Structure and Phylogenetic Relationships

Liu

Song

et al. 2021

Front. Genet.

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“…Según Simpson & Bashaw (1969), C. setaceus posee individuos triploides (3x = 27) y excepcionalmente hexaploides (6x = 54) mientras que C. advena es hexaploide y presenta un comportamiento meiótico irregular responsable de su esterilidad. No obstante, Zhang et al (2015) registró poblaciones triploides de ambas especies. Además, se ha observado producción de semillas de C. advena tras cruzamientos híbridos con polen de C. setaceus o de C. ciliaris (i.e.…”

Section: Discussionunclassified

Cenchrus (Poaceae) ornamentales en Argentina: ¿De cultivados a invasores?

Carbone

Chiapero

Gutierrez

et al. 2022

Bol. Soc. Argent. Bot.

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Introducción y objetivos: La introducción de plantas exóticas para uso ornamental representa un riesgo de invasión para los ecosistemas. Cenchrus advena, C. longisetus y C. setaceus son gramíneas introducidas como ornamentales y altamente cultivadas en el centro-norte de Argentina, aunque se desconoce su estado en el proceso de invasión. En este trabajo se registra la presencia de estas tres especies, se actualiza su taxonomía, nomenclatura y morfología. Además, se presentan mapas de presencia y una clave para diferenciarlas de sus congéneres, tanto nativas como exóticas. Se analiza el estado de invasión y se discuten recomendaciones de manejo. M&M: Se estudiaron ejemplares de herbario, nuevas poblaciones de plantas cultivadas y naturalizadas y se recopiló información de bases de datos digitales de acceso abierto. Resultados: Se encontraron 158 registros de las tres especies distribuidos en 11 provincias, que permitieron citar por primera vez a C. setaceus para la Flora Argentina. Se halló una alta proporción de registros naturalizados de C. setaceus y C. longisetus. Ambas especies presentaron individuos establecidos en ambientes naturales disturbados de Córdoba, iniciando su propagación como invasoras. Cenchrus advena fue únicamente hallada bajo cultivo. Conclusiones: El comportamiento invasor de los pastos C. longisetus y C. setaceus hallado en Córdoba podría estar replicándose en otras provincias debido al elevado nivel de cultivo y a la susceptibilidad ambiental. Por ende, es urgente frenar su cultivo, monitorear las poblaciones naturalizadas e invasoras y reemplazar su cultivo por especies nativas en el marco de objetivos sustentables y reglamentaciones vigentes.

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“…A total of 15 independent karyotype parameters were determined according to their own formula. These karyotype parameters included the following: Stebbins' karyotype [SK (Stebbins, 1971)], mean long-arm/short-arm ratio [MAR (Zhang et al, 2015)], intrachromosomal asymmetry index [A 1 (Romero Zarco, 1986)], interchromosomal asymmetry index [A 2 (Romero Zarco, 1986)], degree of karyotype asymmetry [A (Watanabe et al, 1999)], dispersion index [DI (Lavania and Srivastava, 1992)], karyotype asymmetry index [AI (Paszko, 2006)], karyotype asymmetry index [AsK% (Arano, 1963)], karyotype symmetry index [Syi (Greilhuber and Speta, 1976)], chromosomal size resemblance index [Rec (Greilhuber and Speta, 1976)], total form percentage [TF% (Huziwara, 1962)], total haploid (monoploid) length of the chromosome set [THL (Altınordu et al, 2016)], coefficient of variation of the chromosome length [CV CL (Paszko, 2006)], coefficient of variation of the centromeric index [CV CI (Paszko, 2006)], and mean centromeric asymmetry [M CA (Peruzzi and Eroglu, 2013)].…”

Section: Methodsmentioning

confidence: 99%

Karyotypic Characteristics and Genetic Relationships of Apricot Accessions from Different Ecological Groups

Li¹,

Liu²,

Zhou³

et al. 2021

J. Amer. Soc. Hort. Sci.

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The present study aims to reveal the karyotypic characteristics and genetic relationships of apricot (Prunus armeniaca L.) accessions from different ecological groups. Fourteen, 9, and 30 accessions from the Central Asian ecological group, North China ecological group, and Dzhungar-Ili ecological group, respectively, were analyzed according to the conventional pressing plate method. The results showed that all the apricot accessions from the different ecological groups were diploid (2n = 2x = 16). The total haploid length of the chromosome set of the selected accessions ranged from 8.11 to 12.75 μm, which was a small chromosome, and no satellite chromosomes were detected. All accessions had different numbers of median-centromere chromosomes or sub-median-centromere chromosomes. The karyotypes of the selected accessions were classified as 1A or 2A. Principal component analysis revealed that the long-arm/short-arm ratio (0.968) and the karyotype symmetry index (−0.979) were the most valuable parameters, and cluster analysis revealed that the accessions from the Central Asian ecological group and Dzhungar-Ili ecological group clustered together. In terms of karyotypic characteristics, the accessions from the Dzhungar-Ili ecological group and Central Asian ecological group were closely related.

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Karyotype diversity analysis and nuclear genome size estimation for Pennisetum Rich. (Poaceae) ornamental grasses reveal genetic relationship and chromosomal evolution

Cited by 11 publications

References 49 publications

Comparative Analysis of the Chloroplast Genome for Four Pennisetum Species: Molecular Structure and Phylogenetic Relationships

Comparative Analysis of the Chloroplast Genome for Four Pennisetum Species: Molecular Structure and Phylogenetic Relationships

Cenchrus (Poaceae) ornamentales en Argentina: ¿De cultivados a invasores?

Karyotypic Characteristics and Genetic Relationships of Apricot Accessions from Different Ecological Groups

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