大豆种间杂交新品种龙小粒豆一号的选育

龙小粒豆一号(原代号龙品9777)是由黑龙江省农业科学院作物育种研究所采用大豆优良品种与野生大豆种间杂交选育出的特用极小粒大豆新品种，主要特点是熟期早、产量高；秆强抗倒伏、不炸荚；粒径5．5mm通过率90％以上；可溶糖含量高、化学品质好，符合日本制纳豆、韩国做豆芽对原料的品质要求。并总结了特用小粒大豆品种选育经验。

Breeding of Longxiaolidou No.1, a new soybean variety from inter-specific crossing

Longxiaolidou No.1 (original name is Longpin 9777) is a new soybean cultivar,with character of extreme small seed size for special usage. It derived from inter -- specific hybridization between elite soybean culti- var and wild soybean. The cultivar was developed in Crop Breeding Institute of Heilongjiang Academy of Agricul- ture Sciences. Its principal traits include early maturity, high yield, lodging resistance, non -- schattering and more than 90 percent of seed with size smaller than 5.5mm, high content of soluble sugar and good chemical quality. Its main parameters meet the standards of making nadou in Japan and sprout in Korea. This article summarized the breeding experience for extreme small seed size.