RAD-seq-Based High-Density Linkage Map Construction and QTL Mapping of Biomass-Related Traits in Sorghum using the Japanese Landrace Takakibi NOG

Autor:	Everlyne A Omollo, Masaaki Kobayashi, Wataru Sakamoto, Norikazu Ohnishi, Masaru Fujimoto, Hideki Takanashi, Hiromi Kajiya-Kanegae, Hiroyoshi Iwata, Nobuhiro Tsutsumi, Toshiaki Kozuka, Motoyuki Ishimori, Makoto Kusaba, Fiona Wacera W, Michiharu Nakano, Kentaro Yano
Rok vydání:	2020
Předmět:	0106 biological sciences 0301 basic medicine Physiology Quantitative Trait Loci Population Plant Science Quantitative trait locus Polymorphism Single Nucleotide 01 natural sciences Genome DNA sequencing 03 medical and health sciences Quantitative Trait Heritable Genetic linkage Biomass education Sorghum Genetics Brix Genetic diversity education.field_of_study biology Chromosome Mapping Genetic Variation food and beverages Sequence Analysis DNA Cell Biology General Medicine biology.organism_classification 030104 developmental biology Genome Plant 010606 plant biology & botany
Zdroj:	Plant and Cell Physiology. 61:1262-1272
ISSN:	1471-9053 0032-0781
DOI:	10.1093/pcp/pcaa056
Popis:	Sorghum [Sorghum bicolor (L.) Moench] grown locally by Japanese farmers is generically termed Takakibi, although its genetic diversity compared with geographically distant varieties or even within Takakibi lines remains unclear. To explore the genomic diversity and genetic traits controlling biomass and other physiological traits in Takakibi, we focused on a landrace, NOG, in this study. Admixture analysis of 460 sorghum accessions revealed that NOG belonged to the subgroup that represented Asian sorghums, and it was only distantly related to American/African accessions including BTx623. In an attempt to dissect major traits related to biomass, we generated a recombinant inbred line (RIL) from a cross between BTx623 and NOG, and we constructed a high-density linkage map based on 3,710 single-nucleotide polymorphisms obtained by restriction-site-associated DNA sequencing of 213 RIL individuals. Consequently, 13 fine quantitative trait loci (QTLs) were detected on chromosomes 2, 3, 6, 7, 8 and 9, which included five QTLs for days to heading, three for plant height (PH) and total shoot fresh weight and two for Brix. Furthermore, we identified two dominant loci for PH as being identical to the previously reported dw1 and dw3. Together, these results corroborate the diversified genome of Japanese Takakibi, while the RIL population and high-density linkage map generated in this study will be useful for dissecting other important traits in sorghum.
Databáze:	OpenAIRE
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