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Development and chromosomal characterization of interspecific hybrids between common buckwheat (Fagopyrum esculentum) and a related perennial species (F. cymosum).

ABSTRACT: Common buckwheat (Fagopyrum esculentum) is an annual self-incompatible plant that is widely grown. The genus Fagopyrum comprises more than 20 species, including F. cymosum, a perennial that, unlike common buckwheat, is highly resistant to excess water. In this study, we developed interspecific hybrids between F. esculentum and F. cymosum via embryo rescue, to improve undesirable traits of common buckwheat, such as low tolerance to excess water. The interspecific hybrids were confirmed by genomic in situ hybridization (GISH). We also developed DNA markers to confirm the identity of the hybrids and if genes derived from each genome were inherited by the next generation. Observations of pollen indicated that the interspecific hybrids were essentially sterile. Unpaired chromosomes and abnormal segregation during meiosis were likely responsible for the pollen sterility of the hybrids. These findings could facilitate buckwheat breeding to produce lines that can withstand harsh environments with wild or related species in the genus Fagopyrum.

SUBMITTER: Sugiyama M 

PROVIDER: S-EPMC10316306 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature

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Development and chromosomal characterization of interspecific hybrids between common buckwheat (<i>Fagopyrum esculentum</i>) and a related perennial species (<i>F. cymosum</i>).

Sugiyama Mari M   Norizuki Miyu M   Kikuchi Shinji S   Yasui Yasuo Y   Matsui Katsuhiro K  

Breeding science 20230401 2

Common buckwheat (<i>Fagopyrum esculentum</i>) is an annual self-incompatible plant that is widely grown. The genus <i>Fagopyrum</i> comprises more than 20 species, including <i>F. cymosum</i>, a perennial that, unlike common buckwheat, is highly resistant to excess water. In this study, we developed interspecific hybrids between <i>F. esculentum</i> and <i>F. cymosum</i> via embryo rescue, to improve undesirable traits of common buckwheat, such as low tolerance to excess water. The interspecifi  ...[more]

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