Phylogenetic analysis of Oryza species, based on simple sequence repeats and their flanking nucleotide sequences from the mitochondrial and chloroplast genomes

2005 ◽  
Vol 110 (4) ◽  
pp. 696-705 ◽  
Author(s):  
Tomotaro Nishikawa ◽  
Duncan A. Vaughan ◽  
Koh-ichi Kadowaki
Author(s):  
Yueyi Zhu ◽  
Xianwen Zhang ◽  
Guopeng Li ◽  
Jiqian Xiang ◽  
Jinghua Su ◽  
...  

The chloroplast genome is conservative and stable, which can be employed to resolve genotypes. Currently, published nuclear sequences and molecular markers failed to differentiate the species from taxa robustly, including Machilus leptophylla, Hanceola exserta, Rubus bambusarum, and Rubus henryi. In this study, the four chloroplast genomes were characterized, and then their simple sequence repeats (SSRs) and phylogenetic positions were analyzed. The results demonstrated the four chloroplast genomes consisted of 152.624 kb, 153.296kb, 156.309 kb, and 158.953 kb in length, involving 124, 130, 129, and 131 genes, respectively. Moreover, the chloroplast genomes contained typical four regions. Six classes of SSR were identified from the four chloroplast genomes, in which mononucleotide was the class with the most members. The types of the repeats were various within individual classes of SSR. Phylogenetic trees indicated that M. leptophylla was clustered with M. yunnanensis, and H. exserta was confirmed under family Ocimeae. Additionally, R. bambusarum and R. henryi were clustered together, whereas they did not belong to the same species due to the differing SSR features. This research would provide evidence for resolving the species and contributed new genetic information for further study.


2020 ◽  
Author(s):  
Hukam C. Rawal ◽  
Abhishek Mazumder ◽  
Sangeeta Borchetia ◽  
Biswajit Bera ◽  
S. Soundararajan ◽  
...  

AbstractTea is an important plantation crop of some Asian and African countries. Based upon the morphological characteristics, tea is classified botanically into 2 main types i.e. Assam and China, which are morphologically very distinct. Further, they are so easily pollinated among themselves, that a third category, Cambod type is also described. Although the general consensus of origin of tea is India, Burma and China joining area, yet specific origin of China and Assam tea are not yet clear. In the present study, we made an attempt to understand the origin of Indian tea through the comparative analysis of different chloroplast (cp) genomes under the Camellia genus. Cp genome based phylogenetic analysis indicated that Indian Assam Tea, TV-1 formed a different group from that of China tea, indicating that TV-1 might have undergone different domestication and hence owe different origin. The simple sequence repeats (SSRs) analysis and codon usage distribution pattern also supported the clustering order in the cp genome based phylogenetic tree.


Author(s):  
Emre SEVİNDİK ◽  
Kemalcan OKAN ◽  
Fadime EFE

In this study, we performed a genetic diversity using RAPD (Random amplified polymorphic DNA) and ISSR (Inter-simple sequence repeats) markers for some Eriobotrya japonica populations grown in the Aegean region of Turkey. PCR was performed with all DNA samples and primers with ability of scoring band. Phylogenetic analysis and pairwise genetic distance between the populations were calculated by using the PAUP analysis program. According to the RAPD data, a total of 33 bands were obtained and 21 of them were polymorphic. The closest genetic distance (0.09677) was found between Aydın and Nazilli populations, while the most distant value was found 0.44000 between Salihli and Nazilli populations. According to the ISSR data, a total of 43 bands were obtained and 18 of them were polymorphic. The closest genetic distance (0.09302) was found between İzmir and Aydın populations, while the most distant values (0.48276) were found between Denizli and Nazilli populations. As a result of this study, the rate of polymorphism obtained in ISSR technique was found to be lower than the RAPD technique.


Genes ◽  
2020 ◽  
Vol 11 (3) ◽  
pp. 299 ◽  
Author(s):  
Jakub Sawicki ◽  
Alina Bączkiewicz ◽  
Katarzyna Buczkowska ◽  
Piotr Górski ◽  
Katarzyna Krawczyk ◽  
...  

The chloroplast genomes of liverworts, an early land plant lineage, exhibit stable structure and gene content, however the known resources are very limited. The newly sequenced plastomes of Conocephalum, Riccia and Sphaerocarpos species revealed an increase of simple sequence repeats during the diversification of complex thalloid liverwort lineage. The presence of long TA motifs forced applying the long-read nanopore sequencing method for proper and dependable plastome assembly, since the length of dinucleotide repeats overcome the length of Illumina short reads. The accumulation of SSRs (simple sequence repeats) enabled the expansion of inverted repeats by the incorporation of rps12 and rps7 genes, which were part of large single copy (LSC) regions in the previously sequenced plastomes. The expansion of inverted repeat (IR) at the genus level is reported for the first time for non-flowering plants. Moreover, comparative analyses with remaining liverwort lineages revealed that the presence of SSR in plastomes is specific for simple thalloid species. Phylogenomic analysis resulted in trees confirming monophyly of Marchantiidae and partially congruent with previous studies, due to dataset-dependent results of Dumortiera-Reboulia relationships. Despite the lower evolutionary rate of Marchantiales plastomes, significant barcoding gap was detected, even for recently divergent holarctic Conocephalum species. The sliding window analyses revealed the presence of 18 optimal (500 bp long) barcodes that enable the molecular identification of all studied species.


2009 ◽  
Vol 9 (4) ◽  
pp. 344-352 ◽  
Author(s):  
E.V. Tambarussi ◽  
D.M. Melotto-Passarin ◽  
S.G. Gonzalez ◽  
J.B. Brigati ◽  
F.A. Jesus ◽  
...  

2007 ◽  
Vol 132 (3) ◽  
pp. 374-380 ◽  
Author(s):  
Min Zhang ◽  
Xiuxin Deng ◽  
Changping Qin ◽  
Chunli Chen ◽  
Hongyan Zhang ◽  
...  

‘Zaohong’ navel orange [Citrus sinensis (L.) Osbeck + C. unshiu Marc.], a new strain of citrus from a graft chimera, was discovered in China. It was diploid and arose at the junction where a ‘Robertson’ navel orange scion was top-worked onto a Satsuma mandarin (C. unshiu). Some characteristics determined by the L1 cell layer, such as juice sacs of fruit and stoma length, were similar to those of Satsuma mandarin, while others, including leaf index, fruit shape, navel, and color and aroma of the rind, were determined by the L2 cell layer, were similar to ‘Robertson’ navel orange. High-performance liquid chromatography analysis of the carotenoid extracts of the flesh of ‘Zaohong’ navel orange indicated that it had the carotenoids profile of Satsuma mandarin with β-cryptoxanthin as the predominant component in the juice sacs in mature fruit. Simple sequence repeats (SSR) and chloroplast simple sequence repeats (cpSSR) analysis showed that both nuclear and chloroplast genomes of ‘Zaohong’ navel orange were composed of both donor plants. On the basis of these facts, ‘Zaohong’ navel orange was found to be a periclinal chimera consisting of L1 derived from Satsuma mandarin and L2/L3 from ‘Robertson’ navel orange. It combined the valuable traits of both donor plants, matured ≈1 month earlier than the present navel orange cultivars, and therefore had good potential in citrus fresh market.


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