Genetic diversity and population structure of Gossypium arboreum L. collected in China

[Background] Gossypium arboreum is a diploid species cultivated in the Old World. It possesses favorable characters that are valuable for developing superior cotton cultivars.

[Method] A set of 197 Gossypium arboreum accessions were genotyped using 80 genome-wide SSR markers to establish patterns of the genetic diversity and population structure. These accessions were collected from three major G. arboreum growing areas in China. A total of 255 alleles across 80 markers were identified in the genetic diversity analysis.

[Results] Three subgroups were found using the population structure analysis, corresponding to the Yangtze River Valley, North China, and Southwest China zones of G. arboreum growing areas in China. Average genetic distance and Polymorphic information content value of G. arboreum population were 0.34 and 0.47, respectively, indicating high genetic diversity in the G. arboreum germplasm pool. The Phylogenetic analysis results concurred with the subgroups identified by Structure analysis with a few exceptions. Variations among and within three groups were observed to be 13.61% and 86.39%, respectively.

[Conclusion] The information regarding genetic diversity and population structure from this study is useful for genetic and genomic analysis and systematic utilization of economically important traits in G. arboreum.

Genetic diversity and population structure of Gossypium arboreum L. collected in China
JIA Yinhua, PAN Zhaoe, HE Shoupu, GONG Wenfang, GENG Xiaoli, PANG Baoyin, WANG Liru and DU Xiongming
Journal of Cotton Research. 2018; 1:11.
https://doi.org/10.1186/s42397-018-0011-0

Analysis of short fruiting branch gene and Marker-assisted selection with SNP linked to its trait in upland cotton

[Background] With the rapid development of genomics, many functional genes have been targeted. Molecular marker assisted selection can accelerate the breeding process by linking selection to functional genes.

[Methods] In a study of upland cotton (Gossypium hirsutum L.), the F2 segregated population was constructed by crossing X1570 (short branches) with Ekangmian-13 (long branches) to identify the short fruiting branch gene and marker-assisted selection with SNP(Single Nucleotide Polymorphisms, SNP) linked to its trait.

[Result] The result demonstrated that linked SSR marker BNL3232 was screened by BSA(Bulked segregant analysis, BSA) method; one SNP locus was found, which was totally separated from the fruiting branches trait in upland cotton.

[Conclusion] It was verified that this SNP marker could be used for molecular assisted selection of cotton architecture.

Analysis of short fruiting branch gene and Marker-assisted selection with SNP linked to its trait in upland cotton
ZHANG Youchang, FENG Changhui, BIE Shu, WANG Xiaogang, ZHANG Jiaohai, XIA Songbo and QIN Hongde
Journal of Cotton Research. 2018; 1:5.
https://doi.org/10.1186/s42397-018-0001-2

Designations for individual genomes and chromosomes in Gossypium

Gossypium, as the one of the biggest genera, the most diversity, and the highest economic value in field crops, is assuming an increasingly important role in studies on plant taxonomy, polyploidization, phylogeny, cytogenetics, and genomics. Here we update and provide a brief summary of the emerging picture of species relationships and diversification, and a set of the designations for individual genomes and chromosomes in Gossypium. This cytogenetic and genomic nomenclature will facilitate comparative studies worldwide, which range from basic taxonomic exploration to breeding and germplasm introgression.

Designations for individual genomes and chromosomes in Gossypium
WANG Kunbo, WENDEL Jonathan F. and HUA Jinping
Journal of Cotton Research. 2018; 1:3.
https://doi.org/10.1186/s42397-018-0002-1

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Recent insights into cotton functional genomics: progress and future perspectives
Javaria Ashraf et al.,
Plant Biotechnology Journal (2018) 16, pp. 699–713
Corresponding author: sglzms@163.com

Recent insights into cotton functional genomics: progress and future perspectives Javaria Ashraf et al., Plant Biotechnology Journal (2018) 16, pp. 699–713 Corresponding author: sglzms@163.com Functional genomics has transformed from futuristic concept to well-established scientific discipline during the last decade. Cotton functional genomics promise to enhance the understanding of fundamental plant biology to systematically exploit genetic resources for the improvement of cotton fibre quality and yield, as well as utilization of genetic information for germplasm improvement. However, determining the cotton gene functions is a much more challenging task, which has not progressed at a rapid pace. This article presents a comprehensive overview of the recent tools and resources available with the major advances in cotton functional genomics to develop elite cotton genotypes. This effort ultimately helps to filter a subset of genes that can be used to assemble a final list of candidate genes that could be employed in future novel cotton breeding programme. We argue that next stage of cotton functional genomics requires the draft genomes refinement, re-sequencing broad diversity panels with the development of high-throughput functional genomics tools and integrating multidisciplinary approaches in upcoming cotton improvement programmes.

 

Comparative transcriptome analysis of cotton fiber development of Upland cotton (Gossypium hirsutum) and Chromosome Segment Substitution Lines from G. hirsutum × G. barbadense Continue reading Articles Related To Genetics 04/18