Breeding and characterization of a new self-compatible common buckwheat [Fagopyrum esculentum] parental line, 'Buckwheat Norin-PL1'

'Buckwheat Norin-PL1' was developed by backcrossing Fagopyrum esculentum cv. 'Botansoba' and an Fsub(1) plant that was produced by crossing 'Botansoba' and F. homotropicum from Yunnan, China. 'Botansoba' is a summer ecotype that is photoperiod-insensitive with a short growth period, and F. homotropicum is a wild relative of common buckwheat. The flower of 'Buckwheat Norin-PL1' is a long-homostyle, in which the lengths of styles and stamens are almost the same. Self-compatibility or incompatibility can be identified by the flower morphology. Because 'Buckwheat Norin-PL1' does not possess an allele of brittle pedicels derived from F. homotropicum, the progeny produced using 'Buckwheat Norin-PL1' do not exhibit brittle pedicels. The seed size of 'Buckwheat Norin-PL1' is similar to that of 'Botansoba'. 'Buckwheat Norin-PL1' does not grow so vigorously, but it is very useful as a parental line for producing self-compatible buckwheat.