10 results on '"Si, Longting"'
Search Results
2. A putative positive feedback regulation mechanism in CsACS2 expression suggests a modified model for sex determination in cucumber ( Cucumis sativus L.)
- Author
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Li, Zheng, Wang, Shu, Tao, Qianyi, Pan, Junsong, Si, Longting, Gong, Zhenhui, and Cai, Run
- Published
- 2012
3. Identification of high-efficiency SSR markers for assessing watermelon genetic purity
- Author
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Si Longting, Gang Sun, Xuelai Zhang, Yawo Mawunyo Nevame Adedze, Lu Xia, Teng Luhua, Deng Zhijun, Gilbert Nchongboh Chofong, Mamadou Gandeka, and Wenhu Li
- Subjects
0106 biological sciences ,0301 basic medicine ,Polymorphism, Genetic ,Jaccard index ,DNA, Plant ,Pcr cloning ,UPGMA ,food and beverages ,Sequence Analysis, DNA ,Biology ,01 natural sciences ,Citrullus ,03 medical and health sciences ,Horticulture ,030104 developmental biology ,Species Specificity ,Genetic similarity ,Genetic marker ,Genetics ,Hybridization, Genetic ,Microsatellite ,Selection (genetic algorithm) ,Microsatellite Repeats ,010606 plant biology & botany ,Hybrid - Abstract
Genomic simple sequence repeat (SSR) markers were used to fingerprint and determine genetic similarity (GS) of the watermelon breeding lines, as well as the purity of their hybrid derivatives. Cluster analysis and Jaccard’s distance coefficients using the unweighted pair group method with arithmetic mean (UPGMA) have classified these lines into three major groups. Notwithstanding, the genetic background of these lines is narrow as revealed by the restricted GS coefficients. Fifty-five sets of SSR markers were employed in this study. Fourteen of these markers were polymorphic between the breeding lines and were used for assessing hybrid purity. Cross-checking assay validated nine SSR markers as informative SSR markers for purity detection of these hybrids. To confirm the accuracy and efficiency of these markers, their derived PCR products were further sequenced, and ClSSR09643, ClSSR18153 and ClSSR01623 were selected as high-efficiency SSR markers. Interestingly, SSR markers ClSSR09643 and ClSSR18153 were broadly applied for purity detection of more than two different hybrids, while SSR marker ClSSR01623 behaved as a specific marker for purity detection in this study. Genetic purity of six commercial watermelon hybrids was definitely evaluated using these SSR markers. Genetic purity of all tested hybrids exceeded 96% while the field purity was above 98%. Genetic purity test was an emergency for identifying off-types and selfed female in a lot of hybrid seeds. Here, we elucidated the potential of nine SSR markers including three with higher breeding selection efficiency. We recommended them to seed company for purity improvement of watermelon commercial hybrid varieties.
- Published
- 2018
4. Agarose-resolvable InDel markers based on whole genome re-sequencing in cucumber
- Author
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Xia Yingchun, Amirul Alam, Lu Xia, Qiuyue Sun, Xue Yang, Chofong G Nchongboh, Wenting Zhang, Deng Zhijun, Liu Menghua, Si Longting, Wenhu Li, and Yawo Mawunyo Nevame Adedze
- Subjects
Genetic Markers ,0106 biological sciences ,0301 basic medicine ,Germplasm ,Science ,01 natural sciences ,Genome ,Article ,Chromosomes, Plant ,law.invention ,03 medical and health sciences ,INDEL Mutation ,Species Specificity ,law ,Genetic variation ,Sequencing ,Indel ,Phylogeny ,Polymerase chain reaction ,Electrophoresis, Agar Gel ,Genetics ,Multidisciplinary ,Whole Genome Sequencing ,biology ,Phylogenetic tree ,Molecular engineering ,food and beverages ,biology.organism_classification ,030104 developmental biology ,Medicine ,Plant biotechnology ,Cucumis sativus ,Cucumis ,Genome, Plant ,010606 plant biology & botany ,Reference genome - Abstract
Insertion and Deletion (InDel) are common features in genomes and are associated with genetic variation. The whole-genome re-sequencing data from two parents (X1 and X2) of the elite cucumber (Cucumis sativus) hybrid variety Lvmei No.1 was used for genome-wide InDel polymorphisms analysis. Obtained sequence reads were mapped to the genome reference sequence of Chinese fresh market type inbred line ‘9930’ and gaps conforming to InDel were pinpointed. Further, the level of cross-parents polymorphism among five pairs of cucumber breeding parents and their corresponding hybrid varieties were used for evaluating hybrid seeds purity test efficiency of InDel markers. A panel of 48 cucumber breeding lines was utilized for PCR amplification versatility and phylogenetic analysis of these markers. In total, 10,470 candidate InDel markers were identified for X1 and X2. Among these, 385 markers with more than 30 nucleotide difference were arbitrary chosen. These markers were selected for experimental resolvability through electrophoresis on an Agarose gel. Two hundred and eleven (211) accounting for 54.81% of markers could be validated as single and clear polymorphic pattern while 174 (45.19%) showed unclear or monomorphic genetic bands between X1 and X2. Cross-parents polymorphism evaluation recorded 68 (32.23%) of these markers, which were designated as cross-parents transferable (CPT) InDel markers. Interestingly, the marker InDel114 presented experimental transferability between cucumber and melon. A panel of 48 cucumber breeding lines including parents of Lvmei No. 1 subjected to PCR amplification versatility using CPT InDel markers successfully clustered them into fruit and common cucumber varieties based on phylogenetic analysis. It is worth noting that 16 of these markers were predominately associated to enzymatic activities in cucumber. These agarose-based InDel markers could constitute a valuable resource for hybrid seeds purity testing, germplasm classification and marker-assisted breeding in cucumber.
- Published
- 2021
5. Validation of some disease-resistance molecular markers associated with multiple diseases in tomato for marker-assisted selection program
- Author
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Adedze Yawo Mawunyo Nevame, Lu Xia, Zhang Wenting, Chofong Gilbert Nchongboh, Li Wenhu, Muhammad Mahmudul Hasan, Md. Amirul Alam, Si Longting, Adedze Yawo Mawunyo Nevame, Lu Xia, Zhang Wenting, Chofong Gilbert Nchongboh, Li Wenhu, Muhammad Mahmudul Hasan, Md. Amirul Alam, and Si Longting
- Abstract
Marker-assisted selection (MAS) is a tool that is widely applied in tomato resistance breeding. To determine the robustness of some molecular markers commonly used in MAS, extensive screening of 964 tomato lines was performed under a controlled experimental condition. Initially, the application of 36 molecular markers targeting 26 resistance genes (R genes) and 14 major diseases was evaluated. Here, we employed basic molecular biology and bioinformatics techniques for analysis where polymorphism, accuracy and clearness of amplicons constituted the selection criteria of markers. Upon initial analysis, 20 of these markers designated as efficient markers, among which 8 were considered gene-based markers and referred to as perfect markers were selected for detail evaluation. Information extrapolated from PCR result revealed 18 R genes that control 12 diseases were grouped under efficient markers. On the other hand, grouping of breeding lines based on the number of R gene harbored comprehensively revealed 62% of the lines to be void of R gene, while 38% carry different types of R genes. This provides us with an avenue to better understand new sources of resistance in the breeding lines. Conclusively, these efficient markers and their limited PCR condition can be suggested as basis of a diagnostic kit for MAS applications against 12 major tomato diseases and the identified resistant breeding lines could be conserved in order to be propagated as different sources of resistance for the development of new resistant varieties. Therefore, in areas with high vulnerability to diseases, high efficiency combination of the relevant R genes and their pyramiding into commercial tomato varieties are proposed to be implemented as a pragmatic approach.
- Published
- 2020
6. Validation of some disease-resistance molecular markers associated with multiple diseases in tomato for marker-assisted selection program
- Author
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Chofong Gilbert Nchongboh, Md. Amirul Alam, Zhang Wenting, Adedze Yawo Mawunyo Nevame, Muhammad Mahmudul Hasan, Lu Xia, Si Longting, and Li Wenhu
- Subjects
Multidisciplinary ,Polymorphism (computer science) ,Robustness (evolution) ,Computational biology ,R gene ,Marker-assisted selection ,Plant disease resistance ,Biology ,Amplicon ,Gene ,Selection (genetic algorithm) - Abstract
Marker-assisted selection (MAS) is a tool that is widely applied in tomato resistance breeding. To determine the robustness of some molecular markers commonly used in MAS, extensive screening of 964 tomato lines was performed under a controlled experimental condition. Initially, the application of 36 molecular markers targeting 26 resistance genes (R genes) and 14 major diseases was evaluated. Here, we employed basic molecular biology and bioinformatics techniques for analysis where polymorphism, accuracy and clearness of amplicons constituted the selection criteria of markers. Upon initial analysis, 20 of these markers designated as efficient markers, among which 8 were considered gene-based markers and referred to as perfect markers were selected for detail evaluation. Information extrapolated from PCR result revealed 18 R genes that control 12 diseases were grouped under efficient markers. On the other hand, grouping of breeding lines based on the number of R gene harbored comprehensively revealed 62% of the lines to be void of R gene, while 38% carry different types of R genes. This provides us with an avenue to better understand new sources of resistance in the breeding lines. Conclusively, these efficient markers and their limited PCR condition can be suggested as basis of a diagnostic kit for MAS applications against 12 major tomato diseases and the identified resistant breeding lines could be conserved in order to be propagated as different sources of resistance for the development of new resistant varieties. Therefore, in areas with high vulnerability to diseases, high efficiency combination of the relevant R genes and their pyramiding into commercial tomato varieties are proposed to be implemented as a pragmatic approach.
- Published
- 2020
7. Development of a New Molecular Marker for the Resistance to Tomato Yellow Leaf Curl Virus
- Author
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He Yafei, Chofong Gilbert Nchongboh, Lu Xia, Reza Mohammad Emon, Zhang Wenting, Md. Amirul Alam, Li Wenhu, Li Yongbo, Si Longting, Andrew Efisue, Sun Gang, Adedze Yawo Mawunyo Nevame, Mohd Razi Ismail, and Muhammad Mahmudul Hasan
- Subjects
0106 biological sciences ,0301 basic medicine ,Breeding program ,Article Subject ,lcsh:Medicine ,Plant disease resistance ,01 natural sciences ,General Biochemistry, Genetics and Molecular Biology ,03 medical and health sciences ,chemistry.chemical_compound ,Solanum lycopersicum ,Molecular marker ,Wild tomato ,Plant breeding ,Tomato yellow leaf curl virus ,Disease Resistance ,Plant Diseases ,Genetics ,General Immunology and Microbiology ,biology ,fungi ,lcsh:R ,Reproducibility of Results ,food and beverages ,General Medicine ,R gene ,biology.organism_classification ,Plant Breeding ,030104 developmental biology ,chemistry ,Genetic marker ,Begomovirus ,010606 plant biology & botany ,Research Article - Abstract
Tomato yellow leaf curl virus(TYLCV) responsible for tomato yellow leaf curl disease (TYLCD) causes a substantial decrease in tomato (Solanum lycopersicumL.) yield worldwide. The use of resistant variety as a sustainable management strategy has been advocated. Tremendous progress has been made in genetically characterizing the resistance genes (Rgene) in tomato. Breeding tomato for TYLCV resistance has been based mostly onTy-3as a race-specific resistance gene by introgression originating from wild tomato species relatives. Improvement or development of a cultivar is achievable through the use of marker-assisted selection (MAS). Therefore, precise and easy use of gene-targeted markers would be of significant importance for selection in breeding programs. The present study was undertaken to develop a new marker based onTy-3gene sequence that can be used for MAS in TYLCV resistant tomato breeding program. The new developed marker was named ACY. The reliability and accuracy of ACY were evaluated against those ofTy-3linked marker P6-25 through screening of commercial resistant and susceptible tomato hybrids, and genetic segregation using F2 population derived from a commercial resistant hybrid AG208. With the use of bioinformatics and DNA sequencing analysis tools, deletion of 10 nucleotides was observed inTy-3gene sequence for susceptible tomato variety. ACY is a co-dominant indel-based marker that produced clear and strong polymorphic band patterns for resistant plant distinguishing it from its susceptible counterpart. The obtained result correlates with 3:1 segregation ratio of single resistant dominant gene inheritance, which depicted ACY as gene-tag functional marker. This marker is currently in use for screening 968 hybrids varieties and one thousand breeding lines of tomato varieties stocked in Jiangsu Green Port Modern Agriculture Development Company (Green Port). So far, ACY has been used to identify 56 hybrids and 51 breeding lines. These newly detected breeding lines were regarded as potential source of resistance for tomato breeding. This work exploited the sequence ofTy-3and subsequently contributed to the development of molecular marker ACY to aid phenotypic selection. We thus recommend this marker to breeders, which is suitable for marker-assisted selection in tomato.
- Published
- 2018
8. Identification of high-efficiency SSR markers for assessing watermelon genetic purity
- Author
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Lu, Xia, primary, Adedze, Yawo Mawunyo Nevame, additional, Chofong, Gilbert Nchongboh, additional, Gandeka, Mamadou, additional, Deng, Zhijun, additional, Teng, Luhua, additional, Zhang, Xuelai, additional, Sun, Gang, additional, Si, Longting, additional, and Li, Wenhu, additional
- Published
- 2018
- Full Text
- View/download PDF
9. Localization of genes for lateral branch and female sex expression and construction of a molecular linkage map in cucumber (Cucumis sativus L.) with RAPD markers
- Author
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Pan JunSong, Tian Libo, Wang Gang, Wu Aizhong, Li Xiaozun, Cai Run, and Si Longting
- Subjects
Genetics ,biology ,Gene mapping ,Genetic linkage ,Female sex ,General Materials Science ,Locus (genetics) ,Plant reproductive morphology ,biology.organism_classification ,Cucumis ,Gene ,RAPD - Abstract
A cucumber (Cucumis sativus L.) molecular linkage map, including 79 random-amplified polymorphic DNAs (RAPD) and two genes, lb for lateral branch and f for female sex expression, is constructed from a cross between a line, S52, with weak lateral growing ability and staminate from Dabieshan Mountains area in China and another line, S06, with strong lateral growing ability and gynoecious from Europe. The map contains nine linkage groups and spans 1110.0 cM with an average distance of 13.7 cM between loci. The lb locus is located in a longer linkage group LG-2 and flanked by two markers, OP-Q5-1 and BC151, in a short linkage group were found to flank f at 13.7 cM and 13.4 cM, respectively. The construction of RAPD map has paved a way for further study of the genes for lateral branch, female sex expression and other agronomic traits in cucumber. The authors contributed equally to this work Supported by the Shanghai Municipal Scientific & Technological Commission (Grant Nos. 033107019 and 02JC14036)
- Published
- 2005
10. Molecular Isolation of the M Gene Suggests That a Conserved-Residue Conversion Induces the Formation of Bisexual Flowers in Cucumber Plants
- Author
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Li, Zheng, primary, Huang, Sanwen, additional, Liu, Shiqiang, additional, Pan, Junsong, additional, Zhang, Zhonghua, additional, Tao, Qianyi, additional, Shi, Qiuxiang, additional, Jia, Zhiqi, additional, Zhang, Weiwei, additional, Chen, Huiming, additional, Si, Longting, additional, Zhu, Lihuang, additional, and Cai, Run, additional
- Published
- 2009
- Full Text
- View/download PDF
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