杂交豆2号选育及高产制种技术研究

杂交豆2号是利用"三系"法选育的大豆杂交种,不育系为JLCMS47A,恢复系为JLR2。杂交豆2号的主要特点是高产、稳产,品质较好,抗病性强。两年区试平均比对照增产22.7%,生产试验比对照增产14.3%。人工接种鉴定中抗大豆花叶病毒病和大豆灰斑病,田间自然诱发鉴定,对大豆花叶病毒病免疫、抗大豆灰斑病、抗大豆霜霉病、抗细菌性斑点病。子粒脂肪含量20.54%,蛋白质含量40.75%。杂交豆2号制种必须选择干旱少雨、有灌溉条件和天然昆虫群体多的地区进行。父母本错期播种,种植比例为1∶1或1∶2,密度为15～18万株/hm2。利用切叶蜂进行传粉,整个生育期严格去杂去劣,确保种子纯度。

Studies on Breeding of 'HybSoy 2' Soybean and High Yield Seed Production Technique

‘HybSoy 2',which was developed from cross of JLCMS47A(CMS A line) × JLR2(CMS R line),has the characteristics of high yield,good quality and high resistance to disease.Yield of‘HybSoy 2' increased by 22.7% in two years' plot trials and 14.3% in production experiment compared with the control cultivar.The result of artificial inoculation indicated that‘HybSoy 2' was middle resistant to soybean mosaic virus and Cercospora sojina Hara.The seed oil content and protein content of ‘HybSoy 2' are 20.54% and 40.75%,respectively.Ideal growing conditions are needed to produce high quality seeds of ‘HybSoy 2'.It should be planted in dry regions where good irrigation conditions and natural insect groups are available.The parent lines of JLCMS47A and JLR2 should be sowed in batches one after another.A ratio of 1 row JLCMS47A for every 1 or 2 rows JLR2 was recommended with 150,000 to 180,000 plants per hm2.Megachile rotundata was used as pollinator.The parent lines must be pure to ensure the seed purity by strictly removing any contaminated and off-type(usually inferior) plants before hybridization.