Liang Huizhen Li Weidong.EXSERTED STIGMA OF TWIN STYLUS AND IT’ S GENETIC BASIS OFHETEROGENEITY IN SOYBEAN[J].Soybean Science,2005,24(04):256-259,329.[doi:10.11861/j.issn.1000-9841.2005.04.0256]
大豆柱头外露突变体及其遗传规律*
- Title:
- EXSERTED STIGMA OF TWIN STYLUS AND IT’ S GENETIC BASIS OFHETEROGENEITY IN SOYBEAN
- Keywords:
- Male - sterile ; Mutant ; Soybean ; Exsered stigma; Twin style
- 文献标志码:
- A
- 摘要:
- 首次发现大豆突变体 HNL002 具有双花柱 、柱头外露 、花药退化、花药距柱头的距离远和不育五种突变聚集在一起的特征 。细胞学鉴定结果 :花丝短, 柱头 、花柱和果柄长 ,双花柱外露时花的顶部有一小孔, 呈开放状 。花药少且开裂性差 。开花时花药较明显地低于柱头而围绕于子房的四周,自花授粉难 ,植株表现出一定程度的不育 。基因遗传结果:不育由细胞核隐性基因控制,柱头外露和不育表达是一主效隐性基因和多个微效(修饰)基因共同作用的结果;高温可使花丝扭曲变异,拉长柱头与花药的距离, 降低结荚率;柱头外露的果柄越长其柱头外露的长度也愈长 ;柱头外露的基因型明显的表现为长柱头、长花柱和长粒型 。该研究为大豆“三系”和“两系”的直接利用提供育种资源,促使杂交大豆走向大规模商业化 。
- Abstract:
- Here we report a soybean semi - sterile line (HNL002). HNL002 possesses five mutations,which are exsered stigma , twin stylus, anther degeneration , male - sterile and long distance between an-ther and stigma entirely. Through cytological observation , this semi - sterile line gets together shorter fil-ament ,and longer stigma, longer stylus and longer carpophore. The flowers present a opening pore on thetop of twin stylus, while stigma exserting. Anther is few , and anther dehiscence is difficult. Anther sur-rounding ovary is obviously lower than stigma , when blooming. Self - pollination is difficult , therefore themutation has some of stertile. Stertile is controled by nucleus recessive gene , the ratio of fertile to exseredstigma sterile would be 3 :1. High temperature could make filament twist , which increased the distance be-tween stigma and anther. Those maybe result in lower podding rate. The degree of stylus exsertion is alongwith carpophore length increasing. The genotype of exsered stigma represents long stigma, long stylus andlong chondrio evidently. That finding will directly provide breeding resource for application of "three - linehybrid"and "two - line hybrid"in soybean , which will make hybrid soybean come in market cosmically.
参考文献/References:
1 Owen F V. A sterile character in soybeans[ J] . Plant Physiolo-gy , 1928, 3:223 - 226.
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备注/Memo
基金项目:河南省自然科学基金项目, 编号为:0511030500 作者简介:梁慧珍(1968 -), 女, 副研究员, 博士生, 从事大豆遗传育种及功能基因组研究。E- mail:lhzh66666@163. com