title: Isolation, characterization and mapping of genes differentially expressed during fibre development between Gossypium hirsutum and G. barbadense by cDNA-SRAP.
abstract: Gossypium hirsutum and G. barbadense are two cultivated tetraploid cotton species with differences in fibre quality. The fibre of G. barbadense is longer, stronger and finer than that of G. hirsutum. To isolate genes expressed differently between the two species during fibre development, cDNA-SRAP (sequence-related amplified polymorphism) was applied. This technique was used to analyse genes at different stages of fibre development in G. hirsutum cv. Emian22 and G. barbadense acc. 3-79, the parents of our interspecific mapping population. A total of 4096 SRAP primer combinations were used to screen polymorphism between the DNA of the parents, and 275 highly polymorphic primers were picked out to analyse DNA and RNA from leaves and fibres at different developmental stages of the parents. A total of 168 DNA fragments were isolated from gels and sequenced: 54, 30, 38 and 41 from fibres of 5, 10, 15 and 20 days post-anthesis, respectively, and five from multi stages. To genetically map these sequences, 104 sequence-specific primers were developed and were used to screened polymorphism between the mapping parents. Finally, six markers were mapped on six chromosomes of our backbone interspecific genetic map. This work can give us a primary knowledge of differences in mechanism of fibre development between G. hirsutum and G. barbadense.
authors: National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, Hubei, People's Republic of China. linzhongxu@mail.hzau.edu.cn
authors: Chuanxiang
authors: C
authors: Liu
authors: Daojun
authors: D
authors: Yuan
authors: Xianlong
authors: X
authors: Zhang
authors: Zhongxu
authors: Z
authors: Lin
mesh_terms: D002874:Chromosome Mapping; D003001:Cloning, Molecular; D032561:Cotton Fiber; D018076:DNA, Complementary / Q000032:analysis; D020869:Gene Expression Profiling / Q000379:methods; D018507:Gene Expression Regulation, Developmental; D017343:Genes, Plant; D003368:Gossypium / Q000235:genetics* / Q000254:growth & development; D058977:Molecular Sequence Annotation; D021141:Nucleic Acid Amplification Techniques / Q000379:methods*; D017422:Sequence Analysis, DNA; D013045:Species Specificity
chemical_list: D018076:DNA, Complementary
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