Intra- and interspecific variation in genome size in Lathyrus (Leguminosae)

Nandini, Adayapalam; Murray, B. G.; O'Brien, Iona E.W.; Hammett, K. R. W.

doi:10.1111/j.1095-8339.1997.tb02265.x

Cited by 16 publications

(23 citation statements)

References 20 publications

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“…This, Bennett (1972) explains, is why annuals have a smaller genome size than obligate perennials, and why ephemeral species have the smallest genome sizes of all. This phenomenon has been noted in Lathyrus (Nandini et al 1997), but no differences were seen in Papaver species (Srivastava and Lavania 1991). Does the positive relationship between genome size and juvenile period hold on a finer scale for perennials?…”

Section: Minimum Generation Timementioning

confidence: 75%

“…While species with small C-values can be ephemerals, annuals, or perennials, there appears to be C-value maxima for ephemerals and annuals, and a minimum C-value above which a species is restricted to an obligate perennial habit (Bennett 1987). In Lathyrus, mean nuclear DNA content of annuals is less than that of perennials (Nandini et al 1997). Weeds, in general, have small C-values or nuclear DNA contents (Bennett et al 1998;Knight and Ackerly 2002).…”

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confidence: 95%

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Evolution of Genome Size in Pines (Pinus) and Its Life-History Correlates: Supertree Analyses

et al. 2004

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Abstract. Genome size has been suggested to be a fundamental biological attribute in determining life-history traits in many groups of organisms. We examined the relationships between pine genome sizes and pine phylogeny, environmental factors (latitude, elevation, annual rainfall), and biological traits (latitudinal and elevational ranges, seed mass, minimum generation time, interval between large seed crops, seed dispersal mode, relative growth rate, measures of potential and actual invasiveness, and level of rarity). Genome sizes were determined for 60 pine taxa and then combined with published values to make a dataset encompassing 85 species, or 70% of species in the genus. Supertrees were constructed using 20 published source phylogenies. Ancestral genome size was estimated as 32 pg. Genome size has apparently remained stable or increased over evolutionary time in subgenus Strobus, while it has decreased in most subsections in subgenus Pinus. We analyzed relationships between genome size and life-history variables using cross-species correlations and phylogenetically independent contrasts derived from supertree constructions. The generally assumed positive relation between genome size and minimum generation time could not be confirmed in phylogenetically controlled analyses. We found that the strongest correlation was between genome size and seed mass. Because the growth quantities specific leaf area and leaf area ratio (and to a lesser extent relative growth rate) are strongly negatively related to seed mass, they were also negatively correlated with genome size. Northern latitudinal limit was negatively correlated with genome size. Invasiveness, particularly of wind-dispersed species, was negatively associated with both genome size and seed mass. Seed mass and its relationships with seed number, dispersal mode, and growth rate contribute greatly to the differences in life-history strategies of pines. Many life-history patterns are therefore indirectly, but consistently, associated with genome size.

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Section: Minimum Generation Timementioning

confidence: 75%

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confidence: 95%

Evolution of Genome Size in Pines (Pinus) and Its Life-History Correlates: Supertree Analyses

et al. 2004

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“…Marek et al (2009) reported a high level intraspecific variation in different populations of Picris hieracioides . Significant level of intraspecific variation was noted in five species of Lathyrus genus (Nandini et al 1997). The contradiction of having low intraspecific variation and high interspecific variation in diploid Triticeae species proposed that emergence of genome size occurs just before, during or right after the process of speciation (Eilam et al 2007).…”

Section: Discussionmentioning

confidence: 99%

Intraspecific variations in cardamom (Elettaria cardamomum Maton): assessment of genomic diversity by flow cytometry, cytological studies and ISSR analysis

et al. 2016

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Background The main goal of the work was to analyse intraspecific variation in Elettaria cardamomum Maton (cardamom) using genome size, cytological studies and molecular marker data. Nuclear DNA content and molecular marker details furnish data on genome size and genetic diversity respectively among the studied accessions and both complement each other for evolutionary and taxonomic studies.ResultsThe relative 2C genome size and total number of base pairs of cardamom was determined through flow cytometric analysis using propidium iodide staining. The nuclear DNA content was estimated in various sections of the species representing individuals from wild and cultivar genotypes following Zea mays L. CE-777 (2C = 5.43 pg) as internal reference standard. Chromosome number from growing root tip was examined following standard protocols. Twenty-six ISSR primers that generated polymorphic bands were used for genetic diversity analysis of the thirty accessions of cardamom. Estimated nuclear 2C DNA content ranged from 2.57 to 3.22 pg demonstrating 1.25-fold variation. The mean amount of 2C nuclear DNA of the cardamom was calculated as 2.87 pg which is equivalent of 2806 Mbp as the diploid genome size. The chromosome number was found to be 2n = 48. Among the thirty accessions of cardamom studied using ISSR markers, C53 (feral from Bonacaud) showed a very prominent level of genetic diversity and was lowest for C96 (Avinash-I, a released variety from Indian Institute of Spices Research, Kozhikode).ConclusionThese analyses revealed the existence of genetic variability within the studied cardamom accessions. The plant specimens also differed significantly in their genome size. However, the genetic variability parameters did not show any correlation with genome size.

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“…Flow cytometry is used widely for determining amounts of nuclear DNA (Nandini et al ., 1997; Keskitalo, Lindén & Valkonen, 1998; Turpeinen, Kulmala & Nevo, 1999; Lysák et al ., 2000). It can also be used to determine (DNA) ploidy (Lysák & Doležel, 1998; Emshwiller, 2002), although cytological studies are required for confirmation (Bennett, Bhandol & Leitch, 2000).…”

Section: Introductionmentioning

confidence: 99%

Determination of ploidy and nuclear DNA content in populations of Atriplex halimus (Chenopodiaceae)

Walker

Moñino

González

et al. 2005

Botanical Journal of the Linnean Society

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Nuclear DNA contents were determined by flow cytometry for 20 populations of the perennial C 4 shrub Atriplex halimus L. (Chenopodiaceae) originating from the Mediterranean basin and Fuerteventura (Canary Islands). Two populations were also analysed for chromosome number: one (from Ibiza, Spain), with a 2C nuclear DNA content of 2.40 pg, was shown to be diploid (2 n = 2 x = 18), whilst the other (from Sicily, Italy), with 5.11 pg, was tetraploid (2 n = 2 x = 36). With respect to nuclear DNA content, two groups of populations were detected, diploids with 2.40-2.44 pg and tetraploids with 4.77-5.13 pg. The diploid populations were mainly from the western Mediterranean (Spain and France) and Fuerteventura, whereas tetraploids were generally, but not exclusively, from more arid areas in North Africa and the eastern Mediterranean. In general, the diploid and tetraploid populations corresponded to the subspecies halimus and schweinfurthii , respectively. For certain populations having morphologies intermediate between those considered typical of these two subspecies, nuclear DNA contents showed them to be tetraploid. There was significant variation in nuclear DNA content among the tetraploid populations, with greater values in the more easterly populations.

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Intra- and interspecific variation in genome size in Lathyrus (Leguminosae)

Cited by 16 publications

References 20 publications

Evolution of Genome Size in Pines (Pinus) and Its Life-History Correlates: Supertree Analyses

Evolution of Genome Size in Pines (Pinus) and Its Life-History Correlates: Supertree Analyses

Intraspecific variations in cardamom (Elettaria cardamomum Maton): assessment of genomic diversity by flow cytometry, cytological studies and ISSR analysis

Determination of ploidy and nuclear DNA content in populations of Atriplex halimus (Chenopodiaceae)

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