scholarly journals Building a Reference Transcriptome for the Hexaploid Hard Fescue Turfgrass (Festuca brevipila) Using a Combination of PacBio Isoseq and Illumina Sequencing

2020 ◽  
Author(s):  
Yinjie Qiu ◽  
Ya Yang ◽  
Cory D. Hirsch ◽  
Eric Watkins
Keyword(s):  
Illumina Sequencing ◽  
Related Species ◽  
Gene Discovery ◽  
Full Length ◽  
Cool Season ◽  
Illumina Platform ◽  
Closely Related Species ◽  
Reference Transcriptome ◽  
Low Input ◽  
Breeding And Genetics

Abstract Background: Hard fescue (Festuca brevipila Tracey, 2n=6x=42) is a cool season turfgrass with a fine leaf texture that performs well under low-input management. Breeding and genetics studies of F. brevipila have been limited due to the complexity of its hexaploid genome. To advance our knowledge of F. brevipila genomics, we used PacBio isoform sequencing to develop a reference transcriptome for this species. Results: Here, we report the F. brevipila reference transcriptome generated from root, crown, leaf, and seed head tissues. We obtained 59,510 full-length transcripts, of which 38,595 were non-redundant full-length transcripts. The longest and shortest transcripts were 11,487 and 58 bp, respectively. To test the polyploid origin of F. brevipila, we sequenced three additional transcriptomes using closely related species on an Illumina platform. The results of our phylotranscriptomic analysis supported the allopolyploid origin of F. brevipila. Conclusions: Overall, the F. brevipila Pacbio Isoseq reference transcriptome provided the foundation for transcriptome studies and allowed breeders for gene discovery in this important turfgrass species.

scholarly journals Building a Reference Transcriptome for the Hexaploid Hard Fescue Turfgrass (Festuca brevipila) Using a Combination of PacBio Iso-Seq and Illumina Sequencing

2020 ◽  
Author(s):  
Yinjie Qiu ◽  
Ya Yang ◽  
Cory D. Hirsch ◽  
Eric Watkins
Keyword(s):  
Full Length ◽  
Gene Trees ◽  
Illumina Platform ◽  
Closely Related Species ◽  
Festuca Ovina ◽  
Reference Transcriptome ◽  
Sequencing Errors ◽  
Festuca Valesiaca ◽  
Close Relatives ◽  
Breeding And Genetics

AbstractBackgroundHard fescue (Festuca brevipila Tracey, 2n=6x=42) is a cool season turfgrass with a fine leaf texture that performs well under low-input management. Breeding and genetics studies of F. brevipila have been limited due to the complexity of its hexaploid genome. To advance our knowledge of F. brevipila genomics, we used PacBio isoform sequencing to develop a reference transcriptome for this species.ResultsHere, we report the F. brevipila reference transcriptome generated from root, crown, leaf, and inflorescence tissues. We obtained 59,510 full-length transcripts, of which 38,556 were non-redundant full-length transcripts. The longest and shortest transcripts were 11,487 and 58 bp, respectively. Distribution of synonymous distances among paralogs within F. brevipila suggested highly similar subgenomes that are difficult to distinguish from sequencing errors. To evaluate the phylogenetic relationships among F. brevipila and close relatives, we sequenced three additional transcriptomes using closely related species on an Illumina platform. The results of our phylotranscriptomic analysis supported the close relationships among F. brevipila (6x), Festuca ovina (4x), Festuca ovina subsp. ovina (2x), and Festuca valesiaca (2x), with high levels of discordance among gene trees.ConclusionsOverall, the F. brevipila PacBio Isoseq reference transcriptome provided the foundation for transcriptome studies and allowed breeders a resource for gene discovery in this important turfgrass species.

scholarly journals Building a Reference Transcriptome for the Hexaploid Hard Fescue Turfgrass (Festuca brevipila) Using a Combination of PacBio Isoseq and Illumina Sequencing

2020 ◽  
Author(s):  
Yinjie Qiu ◽  
Ya Yang ◽  
Cory D. Hirsch ◽  
Eric Watkins
Keyword(s):  
Full Length ◽  
Gene Trees ◽  
Illumina Platform ◽  
Closely Related Species ◽  
Festuca Ovina ◽  
Reference Transcriptome ◽  
Sequencing Errors ◽  
Festuca Valesiaca ◽  
Close Relatives ◽  
Breeding And Genetics

Abstract Background: Hard fescue (Festuca brevipila Tracey, 2n=6x=42) is a cool season turfgrass with a fine leaf texture that performs well under low-input management. Breeding and genetics studies of F. brevipila have been limited due to the complexity of its hexaploid genome. To advance our knowledge of F. brevipila genomics, we used PacBio isoform sequencing to develop a reference transcriptome for this species. Results: Here, we report the F. brevipila reference transcriptome generated from root, crown, leaf, and inflorescence tissues. We obtained 59,510 full-length transcripts, of which 38,556 were non-redundant full-length transcripts. The longest and shortest transcripts were 11,487 and 58 bp, respectively. Distribution of synonymous distances among paralogs within F. brevipila suggested highly similar subgenomes that are difficult to distinguish from sequencing errors. To evaluate the phylogenetic relationships among F. brevipila and close relatives, we sequenced three additional transcriptomes using closely related species on an Illumina platform. The results of our phylotranscriptomic analysis supported the close relationships among F. brevipila (6x), Festuca ovina (4x), Festuca ovina subsp. ovina (2x), and Festuca valesiaca (2x), with high levels of discordance among gene trees. Conclusions: Overall, the F. brevipila PacBio Isoseq reference transcriptome provided the foundation for transcriptome studies and allowed breeders a resource for gene discovery in this important turfgrass species.

Microsatellite Marker: Importance and Implications of Cross-genome Analysis for Finger Millet (Eleusine coracana (L.) Gaertn)

2020 ◽  
Vol 9 (3) ◽  
pp. 160-170
Author(s):  
Thumadath P.A. Krishna ◽  
Maharajan Theivanayagam ◽  
Gurusunathan V. Roch ◽  
Veeramuthu Duraipandiyan ◽  
Savarimuthu Ignacimuthu
Keyword(s):  
Molecular Marker ◽  
Microsatellite Markers ◽  
Ssr Markers ◽  
Genome Analysis ◽  
Related Species ◽  
Finger Millet ◽  
Crop Improvement ◽  
Human Beings ◽  
Closely Related Species ◽  
Genome Amplification

Finger millet is a superior staple food for human beings. Microsatellite or Simple Sequence Repeat (SSR) marker is a powerful tool for genetic mapping, diversity analysis and plant breeding. In finger millet, microsatellites show a higher level of polymorphism than other molecular marker systems. The identification and development of microsatellite markers are extremely expensive and time-consuming. Only less than 50% of SSR markers have been developed from microsatellite sequences for finger millet. Therefore, it is important to transfer SSR markers developed for related species/genus to finger millet. Cross-genome transferability is the easiest and cheapest method to develop SSR markers. Many comparative mapping studies using microsatellite markers clearly revealed the presence of synteny within the genomes of closely related species/ genus. Sufficient homology exists among several crop plant genomes in the sequences flanking the SSR loci. Thus, the SSR markers are beneficial to amplify the target regions in the finger millet genome. Many SSR markers were used for the analysis of cross-genome amplification in various plants such as Setaria italica, Pennisetum glaucum, Oryza sativa, Triticum aestivum, Zea mays and Hordeum vulgare. However, there is very little information available about cross-genome amplification of these markers in finger millet. The only limited report is available for the utilization of cross-genome amplified microsatellite markers in genetic analysis, gene mapping and other applications in finger millet. This review highlights the importance and implication of microsatellite markers such as genomic SSR (gSSR) and Expressed Sequence Tag (EST)-SSR in cross-genome analysis in finger millet. Nowadays, crop improvement has been one of the major priority areas of research in agriculture. The genome assisted breeding and genetic engineering plays a very crucial role in enhancing crop productivity. The rapid advance in molecular marker technology is helpful for crop improvement. Therefore, this review will be very helpful to the researchers for understanding the importance and implication of SSR markers in closely related species.

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