Chromosome Numbers and Hybrids in Zoysia<sup>1</sup>

Forbes, Ian

doi:10.2134/agronj1952.00021962004400040008x

Cited by 50 publications

(63 citation statements)

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“…Fukuoka (1989) suggested that interspecific hybridization between these two species had occurred in natural populations based on the morphological analysis. Forbes (1952) reported that interspecific hybrids could be obtained among japonica, matrella, and tenuifolia in all combinations and that their morphologies were intermediate between those of the two parent species. In the present experiments, a putative interspecific hybrid between macrostachya and japonica was identified from natural populations.…”

Section: Discussionmentioning

confidence: 99%

“…Taxonomic studies of zoysiagrasses have been conducted by cytogenetical analyses (Forbes, 1952), and flavonoid analyses with paper-chromatography (Nakamura and Nakamae, 1973), and in terms of morphological characteristics (Kitamura, 1970) . Forbes (1952) reported a highly genetic similarity among Zoysia species based on the chromosome pairing in interspecific hybrids. Also, Kitamura (1970) suggested that the classification of Zoysia species should be reconsidered because of a continuous variation of morphological characteristics among species.…”

Section: Introductionmentioning

confidence: 99%

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Genetic variation and interspecific hybridization among natural populations of zoysiagrasses detected by RFLP analyses of chloroplast and nuclear DNA.

Yaneshita¹,

Nagasawa²,

Engelke

et al. 1997

Genes Genet. Syst.

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Genetic variations among 17 accessions of zoysiagrasses collected from natural populations in Japan were investigated by RFLP analyses of chloroplast DNA (cpDNA) and nuclear DNA. These accessions were classified into five species based on morphological characteristics: Zoysia japonica, Z. matrella, Z. tenuifolia, Z. sinica, and Z. macrostachya. On the basis of eight kinds of RFLPs in cpDNAs detected across accessions, six chloroplast genome types (types A-F) were identified. Although type-A cpDNA was shared by five accessions of japonica and four accessions of matrella, derivative cpDNAs of type A, which each arose by a mutation, were identified in one accession of japonica (type B) and in two accessions of matrella (type C). One accession of japonica which showed spikelets similar to those of shapes macrostachya, contained type-F cpDNA as did sinica and macrostachya. The two accessions of tenuifolia each showed a specific cpDNA type, i.e. types D and E.Genetic relationships among the 17 accessions were investigated by the RFLP analyses of nuclear DNA with 20 genomic and gene probes. A dendrogram constructed with genetic distances calculated from the RFLP patterns indicated four major groups among them. Six accessions of japonica comprised one group, whereas the one accession of japonica possessing the type-F cpDNA was clustered with macrostachya and sinica. Four accessions of matrella with type A cpDNA constituted another group in the dendrogram, showing a closer relationship to the japonica accessions than to the other two accessions of matrella. The remaining two accessions of matrella and tenuifolia accessions were grouped together. These data indicate that zoysiagrasses distributed in Japan harbor highly genetic variations, and that interspecific hybridization has occurred in natural populations.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Genetic variation and interspecific hybridization among natural populations of zoysiagrasses detected by RFLP analyses of chloroplast and nuclear DNA.

Yaneshita¹,

Nagasawa²,

Engelke

et al. 1997

Genes Genet. Syst.

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“…Zoysiagrass is predominantly an allotetraploid (2n = 4x = 40) species with a small genome size (about 421 Mbp) (Forbes 1952;Arumuganathan et al 1999). Several genetic maps have been published.…”

Section: Introductionmentioning

confidence: 99%

Construction of a high-density SSR marker-based linkage map of zoysiagrass (Zoysia japonica Steud.)

Yuyama²,

Hirata³

et al. 2009

Euphytica

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A consensus genetic linkage map with 447 SSR markers was constructed for zoysiagrass (Zoysia japonica Steud.), using 86 F 1 individuals from the cross 'Muroran 2' 9 'Tawarayama Kita 1'. The consensus map identified 22 linkage groups and had a total length of 2,009.9 cM, with an average map density of 4.8 cM. When compared with a previous AFLP-SSR linkage map, the SSR markers from each linkage group mapped to similar positions in both maps. Eight pairs of linkage groups from the AFLP-SSR map were joined into eight new groups in the current map. This zoysiagrass consensus map contained 35 SSR markers exhibiting high homology with rice genomic sequences from known chromosomal locations. This allowed synteny to be identified between Zoysiagrass linkage groups 2, 3, 9, 19 and rice chromosomes 3, 12, 2, 7 respectively. These results provide important comparative genomics information and the new map is now available for quantitative trait locus analysis, marker-assisted selection and breeding for important traits in zoysiagrass.

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“…Predominantly wind-pollinated outcrossing species have on an average less than 10 % of the genetic variation between populations [11]. This high level of genetic differentiation also suggests that gene flow among species is low (Nm = 0.332), though no chromosomal barrier of interspecific crossing [8,32].…”

Section: Discussionmentioning

confidence: 97%

DNA Polymorphism and Assessments of Genetic Relationships in genus Zoysia Based on Simple Sequence Repeat Markers

Huh¹

2015

Journal of Life Science

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The genetic variability of four species of the genus Zoysia collected from South Korea was analyzed using an inter-simple sequence repeat (ISSR) marker system. Polymerase chain reactions (PCR) with eight ISSR primers generated 86 amplicons, 76 (87.1%) of which were polymorphisms. The polymorphism information content (PIC) value of the ISSR marker system was 0.848. The percentage of polymorphic loci (Pp) ranged from 41.2% to 44.7%. Nei's gene diversity (H) ranged from 0.149 to 0.186, with an average overall value of 0.170. The mean of Shannon's information index (I) value was 0.250. Total genetic diversity values (HT) varied between 0.356 (ISSR-1) and 0.418 (ISSR-16), for an average overall polymorphic loci of 0.345. Interlocus variation in within-species genetic diversity (HS) was low (0.170). On a per-locus basis, the proportion of total genetic variation due to differences among species (GST) was 0.601. This indicated that about 60.1% of the total variation was among species. Thus, about 39.9 of genetic variation was within species. The estimate of gene flow, based on GST, was very low among species of the genus Zoysia (Nm = 0.332). The phylogenic tree showed three distinct groups: Z. macrostachya and Z. tenuifolia clades and other species were formed the separated clusters. In conclusion, the ISSR assay was useful for detecting genetic variation in the genus Zoysia, and its discriminatory power was comparable to that of other genotyping tools.

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Chromosome Numbers and Hybrids in Zoysia¹

Cited by 50 publications

References 3 publications

Genetic variation and interspecific hybridization among natural populations of zoysiagrasses detected by RFLP analyses of chloroplast and nuclear DNA.

Genetic variation and interspecific hybridization among natural populations of zoysiagrasses detected by RFLP analyses of chloroplast and nuclear DNA.

Construction of a high-density SSR marker-based linkage map of zoysiagrass (Zoysia japonica Steud.)

DNA Polymorphism and Assessments of Genetic Relationships in genus Zoysia Based on Simple Sequence Repeat Markers

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Chromosome Numbers and Hybrids in Zoysia1

Cited by 50 publications

References 3 publications

Genetic variation and interspecific hybridization among natural populations of zoysiagrasses detected by RFLP analyses of chloroplast and nuclear DNA.

Genetic variation and interspecific hybridization among natural populations of zoysiagrasses detected by RFLP analyses of chloroplast and nuclear DNA.

Construction of a high-density SSR marker-based linkage map of zoysiagrass (Zoysia japonica Steud.)

DNA Polymorphism and Assessments of Genetic Relationships in genus Zoysia Based on Simple Sequence Repeat Markers

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Chromosome Numbers and Hybrids in Zoysia¹