【摘要】 雄性不育性的发现为苎麻雄性不育杂种优势利用展现了乐观前景。通过田间观察、花粉压片观察、杂交及自交后代育性分离观察 ,鉴定供试苎麻不育系的育性特征和分析育性遗传方式。供试不育系表现为 4种类型 ,Ⅰ型 -无雄蕾 ;∏型 -雄蕾不膨大 ,无花粉粒 ,最后变黄枯落 ;Ⅲ型 -雄蕾可膨大至 1 .6 - 1 .8mm ,淡黄色 ,无可育花粉粒 ,最后变褐枯落 ;Ⅳ -型个别或少量雄蕾可开放 ,但无可育花粉粒 ,其它方面同Ⅲ型。GS1 4- 1、SS370、GSA - 2、GS1 5 - 8和SS387等不育系的育性由 1对隐性核基因和相应的胞质基因所控制 ,属于核—质互作型雄性不育。已找到不育系的保持系和恢复系。更多还原

【Abstract】 Utilization of ramie heterosis exhibits a brighter future due to the discovery of male sterile lines.Fertility character and its genetics of ramie male sterile lines were studied by field identification,microscopic observation of pollen,and investigation of fertility segregation in F 1,F 2 and self-bred progenies.Four types of male sterility in the tested lines were found.Ⅰ.There is no male flower.Ⅱ.Male flower buds remain undeveloped,without pollen,and abscise at late stsge.Ⅲ.Male flower buds grow up to 1.6-1.8mm in diameter with light yellow color,without fertile pollen,and abscise at late stage.Ⅳ.Male flower buds have the same characters as that in typeⅢ,although a small number of male flowers bloom.One pair of recessive genes and the correspondent cytoplasmic gene cooperatively control the heredity of male sterility in lines GS14-1,GS15-8,GSA-2,SS370and SS387,which is thought as nuclear-cytoplasmic interaction male sterility.Some restorer and maintainer lines to these male sterile lines were also found.更多还原