Abstract
As a highly nutritious crop, Tartary buckwheat (Fagopyrum tartaricum) strongly adapts and grows in adverse environments and is widely grown in Asia. However, its flour contains a large proportion of the hull that adheres to the testa layer of the groats and is difficult to be removed in industrial processing. Fortunately, rice-Tartary, with the loose and non-adhering hull, provides potentiality of improving Tartary buckwheat that can dehull easily. Here, we performed high-throughput sequencing for two parents (Tartary buckwheat and rice-Tartary) and two pools (samples from the F2 population) and obtained 101 Gb raw sequencing data for further analysis. Sequencing reads were mapped to the reference genome of Tartary buckwheat, and a total of 633,256 unique SNPs and 270,181 unique indels were found in these four samples. Then, based on the Bulked Segregant Analysis (BSA), we identified a candidate genetic region, containing 45 impact SNPs/indels and 36 genes, that might underly non-adhering hull of rice-Tartary and should have value for breeding easy dehulling Tartary buckwheat.
Highlights
The genus Fagopyrum, belonging to the eudicot family Polygonaceae, is comprised of 27 species [1]in which two diploid species are cultivated as food crops currently: Tartary buckwheat (Fagopyrum tataricum) and common buckwheat (Fagopyrum esculentum)
In which two diploid species are cultivated as food crops currently: Tartary buckwheat (Fagopyrum tataricum) and common buckwheat (Fagopyrum esculentum)
Rutin is known for its ability in aiding vitamin C usage, for its strong blood vessels, and for reducing high blood pressure and blood clots [5,6,7,8], and its content in Tartary buckwheat seeds is approximately 100 times (0.8–1.7%) higher than in common buckwheat (0.01%) [9]
Summary
The genus Fagopyrum, belonging to the eudicot family Polygonaceae, is comprised of 27 species [1]in which two diploid species are cultivated as food crops currently: Tartary buckwheat (Fagopyrum tataricum) and common buckwheat (Fagopyrum esculentum). Tartary buckwheat has higher and more stable yield attributed to its self-low-seed abortion, compatibility, and tolerance to stress such as frost [2,3]. It is a beneficial health crop which can produce some nutraceutical products and functional foods and shows a higher content of some nutritional components than common buckwheat, such as total vitamin B content, the flavonoid with high antioxidant activity (e.g., rutin) [4]. Most normal mechanical dehulling in industrial processing, such as steam dehulling, is time-consuming, breaking seed, and only up to 70% of the hull can be removed [2] It is one of the main objectives of breeders to develop new easy dehulling
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