CN103329795A - 一种快速获得水稻新型胞质雄性不育恢复源的通用方法 - Google Patents

一种快速获得水稻新型胞质雄性不育恢复源的通用方法 Download PDF

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CN103329795A
CN103329795A CN2013102898043A CN201310289804A CN103329795A CN 103329795 A CN103329795 A CN 103329795A CN 2013102898043 A CN2013102898043 A CN 2013102898043A CN 201310289804 A CN201310289804 A CN 201310289804A CN 103329795 A CN103329795 A CN 103329795A
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male sterility
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rice
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沈显华
黄仁良
严松
沈林军
熊宏亮
朱珊
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RICE RESEARCH INSTITUTE OF JIANGXI ACADEMY OF AGRICULTURAL SCIENCES
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Abstract

本发明公开了一种快速获得水稻新型胞质雄性不育恢复源的通用方法,其包括如下步骤:根据所获得的胞质雄性不育材料的原始细胞质源供体,检测该原始细胞质源供体的可育性,如果该细胞质源供体材料是正常的雄性可育,则以该细胞质源的供体材料作为该胞质雄性不育的恢复源与该胞质雄性不育进行杂交;如果该细胞质源供体材料是雄性不育,则进一步回溯到产生该胞质雄性不育材料的原始供体材料,以该原始供体材料作为该胞质雄性不育的恢复源与该胞质雄性不育进行杂交。通过本发明所提供的技术方法,可快速获得水稻新型胞质雄性不育恢复源,尤其适用于通过广泛测交方法不能筛选到良好的恢复源此类水稻新型胞质雄性不育系,重复性好,结果可靠。

Description

一种快速获得水稻新型胞质雄性不育恢复源的通用方法
技术领域
本发明属于杂交水稻育种技术领域,具体而言,涉及一种快速获得水稻胞质雄性不育恢复源的通用方法。
背景技术
20世纪70年代以来,通过水稻种间远缘杂交和核置换方法选育了多种不同来源的水稻胞质雄性(CMS)不育系。目前,生产上应用的不同来源水稻胞质雄性不育系,根据其恢、保关系总体可以分为野败型(WA-CMS)、包台型(BT-CMS)和红莲型(HL-CMS)等3种主要的雄性不育细胞质类型。
不断培育具有新型雄性不育细胞质源的胞质雄性不育系及其恢复基因源的恢复系,是避免杂交水稻由于长期推广单一细胞质源产生潜在风险的有效技术手段,也是克服当前水稻胞质雄性不育系、恢复系选育过程中因受恢、保关系专效性限制所带来的现有水稻种质资源利用相互限制这一弊端的有效途径。
在培育新型细胞质源的胞质雄性不育系后,寻找其相应的胞质雄性不育恢复系,实现“三系”(不育系、保持系和恢复系)配套,是育种者所必须解决的关键问题。最常用的解决方法是利用现有各类恢复系品种(WA-CMS、HL-CMS、BT-CMS的恢复系)和保持系以及其他水稻品种进行广泛测交筛选恢复系或可恢的种质,这种方法俗称“广泛测恢法”。然而,在新质源胞质雄性不育系培育的过程中,常常遇到通过广泛测恢法而不能筛选恢复系或恢复源。如,国际水稻所利用多年生野生稻(母本)与栽培稻(杂交和回交父本)进行杂交、回交,培育来自多年生野生稻胞质雄性不育质源的新型胞质雄性不育系IR66707A,我国嘉兴市农业科学院以该不育系为母本,培育出嘉早935A,这一新型胞质雄性不育质源的不育系,到现在为止仍未找到恢复度好的恢复源。
发明内容
本发明提供了一种快速获得水稻新型胞质雄性不育恢复源的通用方法。为了实现本发明的目的,拟采用如下技术方案:
本发明一方面涉及快速获得水稻新型胞质雄性不育恢复源的通用方法,其包括如下步骤:根据所获得的胞质雄性不育材料的原始细胞质源供体,检测该原始细胞质源供体的可育性,如果该细胞质源供体材料是正常的雄性可育,则以该细胞质源的供体材料作为该胞质雄性不育的恢复源与该胞质雄性不育进行杂交;如果该细胞质源供体材料是雄性不育,则进一步回溯到产生该胞质雄性不育材料的原始供体材料,以该原始供体材料作为该胞质雄性不育的恢复源与该胞质雄性不育进行杂交。
在本发明的一个优选实施方式中,所述的胞质雄性不育系是通过“广泛测恢法”仍然筛选不到恢复度好的恢复源的水稻新型胞质雄性不育系。
在本发明的另一个优选实施方式中,所述的胞质雄性不育系是东乡野生稻为胞质、中早35为细胞核背景的胞质雄性不育系,胞质雄性不育恢复源是东乡野生稻。
通过本发明所提供的技术方法,可加速新型胞质雄性不育水稻“三系”配套应用,重复性好,结果可靠。
附图说明:
图1:东乡野生稻胞质源的新型胞质雄性不育系——中早35A选育流程图。
具体实施方式
用东乡野生稻(雄性正常可育)为母本,籼型早稻品种“中早35”为回交父本,经过6代回交,获得了以东乡野生稻为胞质、中早35为细胞核背景的新质源胞质雄性不育系(见图1)。
为了确定该新质源保质雄性不育系的恢保关系,我们利用现有“野败型”、“红莲型”杂交稻的保持系和恢复系以及常规水稻品种,分别与该新质源胞质雄性不育系中早35测交。结果所有测交F1均是雄性不育的,且不育度非常彻底(表1)。说明:第一,现有“野败型”、“红莲型”杂交稻的保持系和恢复系,对该新质源胞质雄性不育系的雄性不育性有着彻底的保持性;第二,该新质源胞质雄性不育系的恢保关系完全不同于“野败型”和“红莲型”,属新型胞质雄性不育系,因为无论是“野败型”还是“红莲型”,其恢复系和保持系均不能对该新型不育具有恢复能力;第三,常规品种(表1中最后7个)也不能对该新型不育系具有恢复能力,相反地,具有彻底的保持能力。
利用该新型胞质雄性不育系的细胞质源的原始供体材料——东乡野生稻为父本,与该新型不育系(母本)进行测交。结果显示,测交F1表现正常的花粉育性和结实率(表2)。表明,东乡野生稻是该新型胞质雄性不育系的恢复源。
表1 东乡野生稻胞质源的不育系中早35A与测验品种测交F1的可染花粉率
Figure BSA0000092369900000031
1:括号中WAR和WAB分别代表野败型的恢复系、保持系,HL R和HL B分别代表红莲型的恢复系、保持系。
表2东乡野生稻胞质源的不育系中早35A与东乡野生稻测交F1可染花粉率和结实率
Figure BSA0000092369900000042
以上所述是本发明的优选实施例,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明所述原理的前提下,还可以作出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。

Claims (3)

1.获得水稻胞质雄性不育恢复源的通用方法,其包括如下步骤:根据所获得的胞质雄性不育材料的原始细胞质源供体,检测该原始细胞质源供体的可育性,如果该细胞质源供体材料是正常的雄性可育,则以该细胞质源的供体材料作为该胞质雄性不育的恢复源与该胞质雄性不育进行杂交;如果该细胞质源供体材料是雄性不育,则进一步回溯到产生该胞质雄性不育材料的原始供体材料,以该原始供体材料作为该胞质雄性不育的恢复源与该胞质雄性不育进行杂交。
2.根据权利要求1所述的通用方法,所述的胞质雄性不育系是通过“广泛测恢法”仍然筛选不到恢复度好的恢复源的水稻新型胞质雄性不育系。
3.根据权利要求1所述的通用方法,所述的胞质雄性不育系是东乡野生稻为胞质、中早35为细胞核背景的胞质雄性不育系,胞质雄性不育恢复源是东乡野生稻(雄性可育)。
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* Cited by examiner, † Cited by third party
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CN103651100A (zh) * 2013-12-05 2014-03-26 江西省农业科学院水稻研究所 一种培育胞质雄性不育恢复系的方法

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