CN107176981B - Meica1蛋白及其编码基因在调控花粉育性中的应用 - Google Patents
Meica1蛋白及其编码基因在调控花粉育性中的应用 Download PDFInfo
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Abstract
本发明公开了MEICA1蛋白及其编码基因在调控花粉育性中的应用。本发明提供的蛋白质,命名为MEICA1蛋白,获自水稻,是如下(a)或(b):(a)由序列表中序列1所示的氨基酸序列组成的蛋白质;(b)将序列表中序列1所示的氨基酸序列经过一个或几个氨基酸残基的取代和/或缺失和/或添加且与植物雄性育性相关的由序列1衍生的蛋白质。编码所述MEICA1蛋白的基因(MEICA1基因)也属于本发明的保护范围。本发明还保护所述MEICA1蛋白在调控植物雄性育性中的应用。结合采用组织特异性抑制基因表达的方法,以MEICA1基因为靶标,可获得雄性不育的水稻。
Description
技术领域
本发明属于生物技术领域,具体涉及MEICA1蛋白及其编码基因在调控花粉育性中的应用。
背景技术
水稻是世界上最重要的粮食作物之一,全世界30亿以上的人口以稻米为主食。我国是世界上最大的稻米生产国和消费国,全国有65%以上的人口以水稻为主要食物。持续提高水稻产量对于我国粮食安全至关重要。20世纪70年代,以杂种优势利用为特征的水稻品种改良使我国水稻单产发生了质的飞跃。袁隆平研究出的三系法杂交水稻使我国稻谷单产在矮化育种的基础上再次增产20%,被誉为我国水稻生产的“第二次绿色革命”。三系法杂交水稻由雄性不育系、保持系和恢复系三种不同的水稻品种组成。雄性不育系的利用在杂交水稻的制备和选育过程中起到了至关重要的作用,但是自然界里的自然雄性不育植株极少,鉴定困难,需耗费大量人力物力。因此,通过人工的基因工程途径获得雄性不育水稻成为一个上好的选择。
水稻雄性不育即雄蕊本身没有花粉或者花粉败育。水稻花粉形成的过程也就是雄配子体的发生过程。植物雄配子体花粉的形成包括小孢子的发生和雄配子的形成两个过程。小孢子的发生这一过程都在幼小的花药中进行,包括小孢子母细胞的形成、减数分裂过程以及四分体的分散过程。雄配子体即花粉粒是小孢子经过两次有丝分裂形成的,其中包含被称作雄配子的精细胞。在花粉发育的这一系列过程中涉及到众多相关基因,只有他们按照一定的时空顺序正常表达,才能保证可育花粉的形成。
发明内容
本发明的目的是提供MEICA1蛋白及其编码基因在调控花粉育性中的应用。
本发明提供的蛋白质,命名为MEICA1蛋白,获自水稻,是如下(a)或(b):
(a)由序列表中序列1所示的氨基酸序列组成的蛋白质;
(b)将序列表中序列1所示的氨基酸序列经过一个或几个氨基酸残基的取代和/或缺失和/或添加且与植物雄性育性相关的由序列1衍生的蛋白质。
为了使MEICA1蛋白便于纯化和检测,可在由序列表中序列1所示的氨基酸序列组成的蛋白质的氨基末端或羧基末端连接上如表1所示的标签。
表1标签的序列
上述MEICA1蛋白可人工合成,也可先合成其编码基因,再进行生物表达得到。上述MEICA1蛋白的编码基因可通过将序列表中序列2或序列3所示的DNA序列中缺失一个或几个氨基酸残基的密码子,和/或进行一个或几个碱基对的错义突变,和/或在其5′端和/或3′端连上表1所示的标签的编码序列得到。
编码所述MEICA1蛋白的基因(MEICA1基因)也属于本发明的保护范围。
所述基因具体可为如下1)或2)或3)或4)或5)的DNA分子:
1)编码区如序列表中序列3所示的DNA分子;
2)序列表中序列2第1502-6170位核苷酸所示的DNA分子;
3)序列表中序列2所示的DNA分子;
4)在严格条件下与1)或2)或3)限定的DNA序列杂交且编码植物雄性育性相关蛋白的DNA分子;
5)与1)或2)或3)限定的DNA序列具有90%以上同源性且编码植物雄性育性相关蛋白的DNA分子。
上述严格条件可为用0.1×SSPE(或0.1×SSC),0.1%SDS的溶液,在DNA或者RNA杂交实验中65℃下杂交并洗膜。
含有所述MEICA1基因的重组表达载体、表达盒、转基因细胞系或重组菌均属于本发明的保护范围。
本发明还保护所述MEICA1蛋白在调控植物雄性育性中的应用。所述植物为单子叶植物或双子叶植物。所述单子叶植物可为禾本目植物。所述禾本目植物可为禾本科植物。所述禾本科植物可为稻属植物。所述稻属植物具体可为水稻,例如盐稻8号。
本发明还保护一种特异DNA分子,包括如下元件:区段A、区段B和区段C;所述区段C(间隔序列)位于区段A和区段B之间;所述区段A与所述区段B反向互补;所述区段A如序列表中序列4第464-706位核苷酸所示。所述特异DNA分子可如序列表的序列4第8-706位核苷酸所示。所述特异DNA分子可如序列表的序列4所示。
所述特异DNA分子转录得到的RNA分子也属于本发明的保护范围。
所述特异DNA分子编码的siRNA也属于本发明的保护范围。
本发明还保护一种培育雄性不育植物的方法,包括如下步骤:抑制目的植物中所述MEICA1基因的表达,得到雄性不育植物。所述雄性不育植物具体可为雄性不育的转基因植物。所述植物为单子叶植物或双子叶植物。所述单子叶植物可为禾本目植物。所述禾本目植物可为禾本科植物。所述禾本科植物可为稻属植物。所述稻属植物具体可为水稻,例如盐稻8号。
本发明还保护一种培育花粉母细胞的染色体不能均等分离的植物的方法,包括如下步骤:抑制目的植物中所述MEICA1基因的表达,得到花粉母细胞的染色体不能均等分离的植物。所述花粉母细胞的染色体不能均等分离的植物具体可为花粉母细胞的染色体不能均等分离的转基因植物。所述植物为单子叶植物或双子叶植物。所述单子叶植物可为禾本目植物。所述禾本目植物可为禾本科植物。所述禾本科植物可为稻属植物。所述稻属植物具体可为水稻,例如盐稻8号。
以上任一所述“抑制目的植物中所述MEICA1基因的表达”是通过导入所述特异DNA分子实现的。
以上任一所述“抑制目的植物中所述MEICA1基因的表达”是通过导入干扰载体实现的。所述干扰载体为将所述特异DNA分子插入出发载体中得到的重组质粒。所述干扰载体具体可为将所述特异DNA分子插入pCAMBIA2300-Actin载体的多克隆位点(具体可为PstI位点)得到的重组质粒。
本发明还保护一种培育雄性不育植物的方法,包括如下步骤:抑制目的植物中所述MEICA1蛋白的活性,得到雄性不育植物。所述植物为单子叶植物或双子叶植物。所述单子叶植物可为禾本目植物。所述禾本目植物可为禾本科植物。所述禾本科植物可为稻属植物。所述稻属植物具体可为水稻,例如盐稻8号。
本发明还保护所述MEICA1蛋白、所述MEICA1基因、所述RNA分子、所述siRNA或以上任一所述方法在植物育种中的应用。所述育种的目的为选育雄性不育性的植物。所述育种的目的为选育花粉母细胞的染色体不能均等分离的植物。所述植物为单子叶植物或双子叶植物。所述单子叶植物可为禾本目植物。所述禾本目植物可为禾本科植物。所述禾本科植物可为稻属植物。所述稻属植物具体可为水稻,例如盐稻8号。
以上任一所述雄性不育性具体体现为不结实和/或花粉呈现败育的表型和/或花粉母细胞的染色体不能均等分离。
本发明提供了MEICA1蛋白及其编码基因,MEICA1蛋白通过调控水稻减数分裂进而影响正常配子的产生来控制水稻的育性。结合采用组织特异性抑制基因表达的方法,以MEICA1基因为靶标,可获得雄性不育的水稻。因此,MEICA1蛋白及其编码基因在水稻育种实践中具有重要意义,可以为通过利用杂种优势途径提高水稻产量与品质提供重要资源。
附图说明
图1为实施例1中用亚历山大染色液分别对水稻突变体meica1和盐稻8号的花粉进行染色的结果。
图2为实施例2中用荧光显微镜观察染色体表型的结果。
图3为实施例3中用荧光显微镜观察染色体表型的结果。
具体实施方式
以下的实施例便于更好地理解本发明,但并不限定本发明。下述实施例中的实验方法,如无特殊说明,均为常规方法。下述实施例中所用的试验材料,如无特殊说明,均为自常规生化试剂商店购买得到的。以下实施例中的定量试验,均设置三次重复实验,结果取平均值。
水稻品种盐稻8号(粳稻):江苏省盐城市明天种业科技有限公司。
水稻品种日本晴(粳稻):中国农科院作物科学研究所水稻种质资源中心,库编号I1A13071。
pUCRNAi载体(pUCRNAi vector):参考文献:Hengxiu Yu,Mo Wang,Ding Tang etal.OsSPO11-1isessential for both homologous chromosome pairing and crossoverformation in rice.Chromosoma.2010(119):625-636.。
pCAMBIA2300-Actin载体(pCAMBIA2300-Actin vector):参考文献:Hengxiu Yu,Mo Wang,Ding Tang et al.OsSPO11-1is essential for both homologous chromosomepairing and crossover formation in rice.Chromosoma.2010(119):625-636.。
根癌农杆菌EHA105:北京天恩泽生物技术有限公司,产品目录号:140383。
AAM液体培养基:CaCl2·2H2O 440mg,MgSO4·7H2O 370mg,KH2PO4170mg,KCl2940mg,KI 0.83mg,H3BO3 6.2mg,MnSO4·4H2O 22.3mg,ZnSO4·7H2O 8.6mg,Na2MoO4·2H2O0.25mg,CuSO4·5H2O 0.03mg,CoCl2·6H2O 0.03mg,肌醇100mg,甘氨酸2mg,烟酸0.5mg,VB11mg,VB6 0.5mg,FeSO4·7H2O 27.8mg,Na2-EDTA·2H2O37.3mg,蔗糖68.5g,葡萄糖36g,谷氨酰胺0.877g,水解酪蛋白0.5g,天冬氨酸0.266g,精氨酸0.228g,甘氨酸0.075g,去离子水加至1L;pH为5.2。
NB培养基:(NH4)2SO4 463mg,KNO3 2830mg,CaCl2·2H2O 166mg,MgSO4·7H2O185mg,KH2PO4400mg,KI 0.8mg,H3BO3 1.6mg,MnSO4·4H2O 4.4mg,ZnSO4·7H2O 1.5mg,肌醇100mg,甘氨酸2mg,烟酸0.5mg,VB1 1mg,VB6 0.5mg,FeSO4·7H2O 27.8mg,Na2-EDTA·2H2O37.3mg,蔗糖30g,植物胶2.5g,2,4-D 2mg,水解酪蛋白0.5g,去离子水加至1L;pH为5.8。
NBC培养基:(NH4)2SO4 463mg,KNO3 2830mg,CaCl2·2H2O 166mg,MgSO4·7H2O185mg,KH2PO4400mg,KI 0.8mg,H3BO3 1.6mg,MnSO4·4H2O 4.4mg,ZnSO4·7H2O 1.5mg,肌醇100mg,甘氨酸2mg,烟酸0.5mg,VB1 1mg,VB6 0.5mg,FeSO4·7H2O 27.8mg,Na2-EDTA·2H2O37.3mg,蔗糖30g,葡萄糖10g,植物胶2.5g,2,4-D 2mg,水解酪蛋白0.5g,去离子水加至1L;pH为5.2;倒平板之前加入乙酰丁香酮并使其浓度为100μM。
NBCS1培养基:NH4NO3 640mg,KNO3 1212mg,CaCl2·2H2O 588mg,MgSO4·7H2O247mg,KH2PO4136mg,KI 0.83mg,H3BO3 3.1mg,MnSO4·4H2O 11.2mg,ZnSO4·7H2O5.76mg,Na2MoO4·2H2O 0.24mg,CuSO4·5H2O 0.03mg,CoCl2·6H2O 0.03mg,肌醇90mg,甘氨酸2mg,烟酸6mg,VB1 8.5mg,VB6 1mg,FeSO4·7H2O 27.8mg,Na2-EDTA·2H2O 37.3mg,甘露醇36.43g,蔗糖20g,植物胶2.5g,2,4-D 2mg,水解酪蛋白0.5g,去离子水加至1L;pH为5.8;倒平板之前加入G418并使其浓度为100mg/L。
NBCS2培养基:NH4NO3 640mg,KNO3 1212mg,CaCl2·2H2O 588mg,MgSO4·7H2O247mg,KH2PO4136mg,KI 0.83mg,H3BO3 3.1mg,MnSO4·4H2O 11.2mg,ZnSO4·7H2O 5.76mg,Na2MoO4·2H2O 0.24mg,CuSO4·5H2O 0.03mg,CoCl2·6H2O 0.03mg,肌醇90mg,甘氨酸2mg,烟酸6mg,VB1 8.5mg,VB6 1mg,FeSO4·7H2O 27.8mg,Na2-EDTA·2H2O 37.3mg,甘露醇36.43g,蔗糖20g,植物胶2.5g,2,4-D 2mg,水解酪蛋白0.5g,去离子水加至1L;pH为5.8;倒平板之前加入G418并使其浓度为200mg/L。
NBA分化培养基:NH4NO3 640mg,KNO3 1212mg,CaCl2·2H2O 588mg,MgSO4·7H2O247mg,KH2PO4136mg,KI 0.83mg,H3BO3 3.1mg,MnSO4·4H2O 11.2mg,ZnSO4·7H2O 5.76mg,Na2MoO4·2H2O 0.24mg,CuSO4·5H2O 0.03mg,CoCl2·6H2O 0.03mg,肌醇90mg,甘氨酸2mg,烟酸6mg,VB1 8.5mg,VB6 1mg,FeSO4·7H2O 27.8mg,Na2-EDTA·2H2O 37.3mg,麦芽糖20g,脱落酸5mg,植物胶3g,2,4-D 2mg,6-BA 2mg,萘乙酸1mg,水解酪蛋白0.3g,去离子水加至1L;pH为5.8;倒平板之前加入G418并使其浓度为200mg/L。
1/2MS培养基:NH4NO3 825mg,KNO3 950mg,CaCl2·2H2O 220mg,MgSO4·7H2O185mg,KH2PO485mg,KI 0.83mg,H3BO3 6.2mg,MnSO4·4H2O 22.3mg,ZnSO4·7H2O 8.6mg,Na2MoO4·2H2O 0.25mg,CuSO4·5H2O 0.03mg,CoCl2·6H2O 0.03mg,肌醇100mg,甘氨酸2mg,烟酸0.5mg,VB1 0.1mg,VB6 0.5mg,FeSO4·7H2O 27.8mg,Na2-EDTA·2H2O 37.3mg,蔗糖30g,多效唑6mg,植物胶2g,萘乙酸1mg,水解酪蛋白0.3g,去离子水加至1L;pH为5.8。
实施例1、MEICA1蛋白及其编码基因的获得
一、水稻突变体meica1的获得及其表型分析
取盐稻8号,进行Co60辐射诱变,获得一个不育突变体,命名为水稻突变体meica1。
在营养生长及开花时间等方面,水稻突变体meica1与盐稻8号均无明显差异。抽穗后,水稻突变体meica1表现出雄性不育表型且最终不结实。图1的A为盐稻8号成熟期的照片。图1的B为水稻突变体meica1成熟期的照片。
用亚历山大染色液分别对水稻突变体meica1和盐稻8号的花粉进行染色。盐稻8号的花粉的照片见图1的C,显示为紫红色。水稻突变体meica1的花粉的照片见图1的D,不能被染色。
二、图位克隆
选取后代存在分离株系(可育和不育植株)的正常植株(包含AA基因型和Aa基因型)与日本晴杂交,对F2群体中220株不育隐性个体进行突变基因的初步定位。利用STS标记,将该基因初步定位于3号染色体长臂STS标记H2和H3之间。随后用F3后代群体中643株不育隐性个体将突变基因定位在STS标记Q2和Q3将近50Kb区间内。利用水稻基因组注解数据库RiceGAAS(Rice Genome Automated Annotation System)进行分析,50Kb区间内包含7个预测基因,测序发现其中一个存在一个11bp碱基缺失,导致相应蛋白的翻译移码和提前终止。
三、MEICA1蛋白及其编码基因的获得
提取日本晴的总RNA并反转录为cDNA。以cDNA为模板,分别进行ORF扩增、5’RACE和3’RACE,拼接后得到全长序列,该序列编码序列表的序列1所示的蛋白质。
将序列表的序列1所示的蛋白质命名为MEICA1蛋白。将编码MEICA1蛋白的基因命名为MEICA1基因,基因组中的相应序列如序列表的序列2所示(包含7个外显子和6个内含子;7个外显子依次为序列表的序列2自5’末端第1502-1597位,第1902-1994位,第2153-2287位,第2417-2515位,第2849-2986位,第3492-5110位,第5213-6170位),cDNA中的开放阅读框如序列表的序列3所示。
实施例2、细胞学表型分析
待测样本为:盐稻8号处于减数分裂时期的幼穗和水稻突变体meica1处于减数分裂时期的幼穗。
依次进行如下步骤:
1、取待测样本,用卡诺氏固定液(无水乙醇:冰醋酸=3:1;体积比)固定24h。
2、用解剖针将花药拨出至载玻片上,加少许醋酸洋红,用解剖针迅速将花药敲碎,使花粉母细胞游离出来,盖上盖玻片。
3、取载玻片,在盖玻片一侧加适量45%醋酸水溶液,在另一侧放置一张大小合适的滤纸条,反复重复此步骤,直到将载玻片上的醋酸洋红清除干净,然后将载玻片放入液氮中浸泡20sec,迅速取出,用刀片揭去盖玻片。
4、取载玻片,依次放入70%乙醇水溶液、90%乙醇水溶液和100%乙醇中各浸泡5min,进行梯度脱水,干燥后滴加DAPI,然后用荧光显微镜观察染色体表型。
照片见图2。盐稻8号:细线期时染色体呈相互缠绕的细线状;偶线期时,同源染色体开始配对和联会;粗线期时,同源染色体完全配对并完成联会复合体的组装,染色体呈现粗线状结构(图2的A);终变期时,染色体高度浓缩,同源染色体间通过交叉结连接在一起,并且可以清晰的看到12个呈环状或者棒状的二价体(图2的B);中期I,12个二价体整齐排列于赤道板上(图2的C);后期I时,同源染色体均等分离,在纺锤丝的牵引下移动至细胞两极(图2的D);中期II时,两个子细胞的染色体分别排布于各自的赤道板上(图2的E);后期II,姊妹染色单体均等分离,最终产生染色体数目减半大小均匀的四分体(图2的F)。水稻突变体meica1:细线期到粗线期时染色体行为无明显异常;粗线期时,同源染色体能完成联会,形成粗线状结构,但可以观察到非同源染色体间的粘连(图2的G);终变期,可以观察到若干个非同源染色体的粘连在一起(图2的H);中期I时,二价体与多价体共同排列于赤道板上(图2的I);后期I,染色体分离,同时产生大量染色体碎片(图2的J);减数第二次分裂过程中,同样存在染色体的碎片(图2的K),最终形成染色体数目不均等的四分体,且能观察到微核(图2的L)。结果表明,水稻突变体meica1花粉中染色体的行为缺陷造成随后形成的小孢子内染色体组的紊乱,导致花粉败育。
实施例3、MEICA1基因功能分析
一、构建RNAi载体
1、取盐稻8号的5cm幼穗,提取总RNA,并反转录为cDNA。
2、以步骤1得到的cDNA为模板,采用MEICA1-RNAi-F和MEICA1-RNAi-R组成的引物对进行PCR扩增,回收PCR扩增产物。
MEICA1-RNAi-F:5’-GGATCCACAAAGAAGAGGAAGATGCC-3’;
MEICA1-RNAi-R:5’-GTCGACACGCTAAGAAGAAACTGAAT-3’。
3、用限制性内切酶BamHI和SalI双酶切步骤2得到的PCR扩增产物,回收酶切产物。
4、用限制性内切酶BamHI和SalI双酶切pUCRNAi载体,回收约2880bp的载体骨架。
5、将步骤3得到的酶切产物和步骤4得到的载体骨架连接,得到重组质粒。
6、用限制性内切酶XholI和BglII双酶切步骤5得到的重组质粒,回收载体骨架。
7、将步骤3得到的酶切产物和步骤6得到的载体骨架连接,得到重组质粒。
8、用限制性内切酶PstI酶切步骤7得到的重组质粒,回收酶切产物。
9、用限制性内切酶PstI酶切pCAMBIA2300-Actin载体,回收约10379bp的载体骨架并进行去磷酸化。
10、将步骤8得到的酶切产物和步骤9得到的去磷酸化的载体骨架进行连接,得到重组质粒,将其命名为干扰载体MEICA1-RNAi。根据测序结果,对干扰载体MEICA1-RNAi进行结构描述如下:在pCAMBIA2300-Actin载体的PstI酶切位点插入了序列表的序列4所示的双链DNA分子。干扰载体MEICA1-RNAi可在植物细胞中转录产生带发夹结构的dsRNA,引发RNAi,从而抑制MEICA1基因的表达。
序列表的序列4中,第464-706位核苷酸组成正向片段,第8-250位核苷酸组成反向片段,正向片段和反向片段之间为来自pUCRNAi载体的GA20内含子。正向片段和反向片段为反向互补的关系。
二、MEICA1-RNAi干扰植株的制备
1、将干扰载体MEICA1-RNAi导入根癌农杆菌EHA105,得到重组农杆菌。
2、用含有200μM乙酰丁香酮的AAM液体培养基重悬步骤1得到的重组农杆菌,得到菌悬液(OD600nm值为0.8-1.0)。
3、选取饱满的盐稻8号成熟种子,小心去除颖壳(避免胚受到损伤),先用70%酒精水溶液浸泡2min,然后用0.1%HgCl2水溶液浸泡12min,然后用无菌水冲洗5次(每次5min)。
4、完成步骤3后,取种子,放置于NB培养基平板中,26℃避光培养14天(诱导愈伤组织)。
5、完成步骤4后,取愈伤组织,浸泡于步骤2得到的菌悬液中,侵染20min。
6、完成步骤5后,取愈伤组织,用无菌滤纸吸干水分,放置于NBC培养基平板中,26℃避光培养3天。
7、完成步骤6后,取愈伤组织,放置于NBCS1培养基平板中,26℃避光培养14天。
8、完成步骤7后,取愈伤组织,放置于NBCS2培养基平板中,26℃避光培养14天。
9、完成步骤8后,取生长状态较好的愈伤组织,放置于NBA分化培养基平板中,26℃光照培养20天。
10、完成步骤9后,将分化出的幼苗转移到1/2MS培养基平板中,26℃光照培养至生根。
11、完成步骤10后,取幼苗,洗净以去除培养基,将根部浸泡于清水中并26℃光照培养2天,然后移栽到大田中并常规栽培管理。
12、取步骤11得到的植株,提取基因组DNA,采用23-F和23-R组成的引物对进行PCR鉴定。23-F和23-R的靶序列位于pCAMBIA2300-Actin载体上,约600bp。如果某一植株PCR鉴定中显示约600bp大小条带,即为PCR鉴定阳性,为MEICA1-RNAi干扰植株。
23-F:5’-CCTTATCTGGGAACTACTCA-3’;
23-R:5’-ATCTCCTGTCATCTCACCTT-3’。
三、转空载体植株的制备
用pCAMBIA2300-Actin载体代替干扰载体MEICA1-RNAi,其他同步骤二,得到转空载体植株。
四、育性鉴定
1、观察植株表型。
待测样本为:5株盐稻8号植株、5株转空载体植株、5株MEICA1-RNAi干扰植株、5株水稻突变体meica1。各个待测样本均是在平行状态下培养的。
在营养生殖阶段,各个待测样本的生长状况无明显差异。
抽穗后,5株MEICA1-RNAi干扰植株的花粉均表现为完全败育(100%雄性不育),5株水稻突变体meica1的花粉也均表现为完全败育,5株盐稻8号植株的花粉均表型正常最终正常结实,5株转空载体植株的花粉均表型正常最终正常结实。
2、观察花粉母细胞减数分裂细胞学表型。
待测样本为:转空载体植株处于减数分裂时期的幼穗、MEICA1-RNAi干扰植株处于减数分裂时期的幼穗。
方法同实施例2。
转空载体植株处于减数分裂时期的幼穗,减数分裂各个时期染色体行为均与野生型一样。而MEICA1-RNAi干扰植株处于减数分裂时期的幼穗,减数分裂各个时期染色体行为与水稻突变体meica1一样。MEICA1-RNAi干扰植株:粗线期时,同源染色体能完成联会,形成粗线状结构,但可以观察到非同源染色体间的粘连(图3的A);终变期,可以观察到若干个非同源染色体的粘连在一起(图3的B);中期I时,二价体与多价体共同排列于赤道板上(图3的C);后期I,染色体分离,同时产生大量染色体碎片(图3的D);减数第二次分裂过程中,也同样存在染色体的碎片(图3的E),最终形成染色体数目不均等的四分体,且能观察到微核(图3的F)。
上述结果表明,MEICA1-RNAi干扰植株花粉母细胞中期I出现非同源染色体的粘连,后期I出现染色体桥和碎片,最终导致遗传物质的不均等分离,造成花粉败育(雄性不育)。
SEQUENCE LISTING
<110> 中国科学院遗传与发育生物学研究所
<120> MEICA1蛋白及其编码基因在调控花粉育性中的应用
<130> GNCYX171288
<160> 4
<170> PatentIn version 3.5
<210> 1
<211> 1045
<212> PRT
<213> 水稻
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tgcaattcct gactgaataa ataataatca tagcatatag aaattttagt agcagtgtgc 60
attgcttcaa gctaaaaaag tttgatcaca catgacagtg ttgaggtaca tgcagaggga 120
aatttttcta cataacatac acactgtaac taaatcaagc ctcacacgtt agaagcaaat 180
caaagctgta atcatcaaga actaatgtcc aatcacttcc ttccttctca tgtcactgag 240
gtaaaacaac aaaggaaaag agagagaacg aacgaccagg caggcaggca accatcgtcg 300
ccgagccgcg gttgccttcg tcgcggtcgt ggctgagcct acgctctccc ttcccttctc 360
atggcactga gcgaggtgct catggagagg gagaggagaa gagggtgtgg cggcggcctg 420
ctgactccgt ccggctggcg accggatcca ctggaggggg aggccaaggc cgatgaatca 480
aatggttgga gagggcttgg gaggcagtgg cgtggcaggg atgaaagagg agaaagggcg 540
gcggctctcg ttcctctcta gggcgccgga tccgccggca aggagaatgg gatcaccgga 600
tccggcggcc ctagtctcct cactgggaga tctggcgggg agggagcggc gatggcgtta 660
cggcgagatg gcttgttgag ggagtggagg cggcgatggc ggcacggcga gatggttgag 720
ggagtggagg ggttgaggga gtggaggagg agggagttgc ggcggcgacg acgcacgcga 780
ggaaggagga gggtgaggat gcggcgcgat ggggggagaa gggcgagacg gcacgcatgg 840
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agagtcgcga caaaccgttt gaaccggcta aagtggagcg gaatgggccg attcagccca 1380
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aatggaggct gacggcggcg ccgccggcga ggaggcggag gagaggagga ggaggagcga 1560
gctcgggtcc ctcgtggaag ccatcaagtc ctccgaggtg cgtgctcgtg cggctcctcg 1620
tccccatttg ctccgttagg ccacttctag ggtttagctt gatacattgt tcgagtgctg 1680
cggccgtgat tggtttccac gaatagagag ttcggtcgag tggaatggat gtagatttgg 1740
ggggtgggga tgggggaatg gatgtttctg ggtgggattt aagatgaatc tccgcgaact 1800
tctgtaggtg ttggccgttg gggtttgggg atttgtgcgc gctctagtta atccatactc 1860
ttccaggcat taataacaac atgatctgta tataatagca ggttttggag aacagaattt 1920
cccttatcaa ccaactcgag gatccttttc agttgtgtgc agatgatctg ggcctagtgg 1980
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acgatgatat atgtagccag tcggatggac tcactgattc attgtttctt agtggacgtt 2100
gtcagtgttt tctagtaagg agttttctta tggtaccttg acaacatctt aggcatcgtg 2160
ggatgattcc acatgttccg gtgtatcaca ctgcatgcta cacaagtcaa ttctgcaggt 2220
tgctcttaaa tgctcagaat tagatacaac caattgcttg gggccatttc ttactcttgg 2280
ttcaaaggta cttgttgcca ttccaaatgg agtcttgctt catcataagt gccagctgta 2340
cctaccttgc ctgcctatct gctttctggc tcaaccaatc aaaacatttg cttgtttttt 2400
ggtgcaccta tgccaggctg gttcgtggtg tgtgaggcat ctcctgtggt ctgttgaatc 2460
tattgatgaa tctgaagatg cccaagagga agaacactcc agattatttc ctgaggtcaa 2520
gggctttgag tctctctctc tctctctctc tctctctctc tctctctctc ttaaaaaaga 2580
tctgtttgta tttcattgca atacatgtag ttatcagtaa taacagaaag aacatttgta 2640
cattactctc aatcactaca ttttttttca atgcagacct atgcaagtga acagtactac 2700
tctcaatcac tacatttttt tcaccagctc atattagttt atacttaatt gttctacatt 2760
ctggagattc attacatcat ttattccttt ctgtaactgt gattctatct agaatgttcc 2820
aatacaagtt caacttattt gactgcagat aattgcactg accttaaata tctcttccaa 2880
gcacctccct gttgcatcta aatgcattgc cgaagatact gtgcatgctg ttggcgactt 2940
tattttggag ttactaaccc tgactgaaag ctcaatactt gacaaggtaa cggttcagtt 3000
cctatattac acaatggtcg tatcaggtgg tttaacttgc atgaccgaaa tctatatttc 3060
tctccttttt ttttatgatc atgttgcttg atttatgtcc tataagatag ttttatatgc 3120
tatcttgcat atatatatcc ttcatctcct gaaagtaact tagcaacaaa aatctaaagg 3180
ggaaatagca aataatggcc aactagagta aatatgttac ctccatgaca ttacaataac 3240
aatagacctt atctgtttca aattacttac aagttttgtt tactcctaaa gagatgtttt 3300
ctgtgagaat attggaaatt catcctttaa ttggaagtgc ttcctaccct tgactaatac 3360
atagattcgt caggctaaaa tttatgtttt tttatccaac tttgatcata tgagatggta 3420
gtgctctttt caaatcattg aaatgctaat attgtagaaa tggagtcatt gtctatgctc 3480
tctgttgaca gaaactcgga actacaggac atgttgctaa ggctgcacct gtttttctag 3540
atgaaaccat caaactgtgc agagtgtact ccgaggctgc aaaatcagac cagtgcataa 3600
tgagcatgcc taaagaagag acaactgagg aacacaaaga gacagatctt actagcaaca 3660
ttgcccagat tacagcatgc actattcagt ccttgtgtaa aataggaacc catgcagcat 3720
ccagtggtgg aagccaggtg attttactga atatatcatg gaagggcata atttccttac 3780
tgcagcttgg taaagggatg gtagaagaaa aggtgaatgt aagagagatt attttaattc 3840
ctatctcagt tgccattgaa tctctgaggg ttgctactga gagatggtgt gtaccattac 3900
aagaagtcct tggtaccgct gaagctagaa gggctttctt accaatcaaa tatttcctaa 3960
cgaacgccgt taggatttgt tctatatatc catctgaaac aatggcaata tacaagagca 4020
taatccggtg tgcactgctg atttcacact caagtattct gttctgcaga aatccccagt 4080
tgaaagcagc aagtgaatta ctttttgagt tattggagcc tagttccttt cttctgttag 4140
acacacttat gaagtcaaca gaagtaagtc cagagtctaa atgccagctc gtgcagtact 4200
ttttggaaaa agtacgaacc ggtaatccag agtacaccgg agaagttgat catacaatga 4260
atttcgctac attgggttgc attttttctg tggattctga tgttgataat ataaacaggg 4320
cacttttacc tgctgaattt actgtgttct tgcacttcct caatgcttcc ccatggttga 4380
gggaagaggt ggtcattgaa ttatgtaaga agctacatct gtttcttaat attttaacgt 4440
tggaagatgt ctactcatat gtacttggct gccaaattcc tgcactaagt agtgatgatg 4500
attctcctaa ggttgtctgg caacctgtat atacttctct tatacaagcc ttgaagactt 4560
ttatgattgc tgcttcttct tcaagtgctg cttggagtga gtttgaagtc ttcttacttg 4620
agaacctttt ccatccccat ttcctttgct tggaaattct aacagagcta tggtgtttct 4680
tcatgcatta tgctgaagct gaaacttcaa cctatttaat caatcagcta tttcttctgt 4740
taaagactct agcgtcacca gaggaagttc ttgcacctct cagtgctctg aggaagcttg 4800
ctcgtgcatc atgtaacatc ttgagctatg catcgtctgc aacaattgat caaatttata 4860
ccatgctgaa tgatagctct tccaagtcat cgatcttgta cttagcactg ttgatggaag 4920
gatttccttt tgattcatta tctcgtggtg taaaggaaca tgctgtgaag acactgttca 4980
cttcttttgc tgggtatcta cagaatcaga actacttcaa gaatcatgga gaaatcaact 5040
tgccaacttc ttctagttcg ggcataatag ggtttcctgt acatgctcta gcctctgctt 5100
tccagagttg gtaagtccct tgtctcttac tattattcag tctgatgcta aaatgctgct 5160
tttatttttg gaaccaaaga aacaattctt ttgtacacaa tattttatgc agcgaaataa 5220
aggacgttac cattgatgaa aaaagtattg ctactatgtt caagattgcc acctctctca 5280
ttaatcttta tagaacttca cctgatagca gtaagaacct ccttgtcaag cacatcagtt 5340
ccatattggt tattattacg cacatgaggc atctttgtgc gttcagtgag ttggagaagt 5400
taactttgga gttgcacact ctgttcatgt ccagttttga taattcaaat acagcaatct 5460
ctcagtgcaa accatcaatg gcttcattta tggcaattct tggtcacttg aacactactg 5520
aagacgatgc aaacccactt tgttctgcaa tgtgggatct gttccatttc ttgctgaggg 5580
agcggcattg ggcactcatt caccttgcaa tgggttcctt tgggtacttt gccgctcgca 5640
cttcttttgc acagctctgg aaatttgttc ctgtagatgc tgccctttcc tacacatgca 5700
caggggtgga catagatgag gatgggttta tgtcagaatt gaaagccttc cttcagaaag 5760
aggtagcctt gcgagatgac aaatggtctg aagagcaaat atgttcacta gtttcagagg 5820
ggagaatgct gaagaaactg gttgaatcat gcttggaaat tcctctagtt ccagagcctg 5880
agaaagtttc aattactaat tatgtgaaaa caaagaaaag gaagatgcca gatggaattt 5940
gtgaaggaat gcctgagaat gtttcagtta ctaatgatgt ggaaacaaag aagaggaaga 6000
tgccagatag aatttgtgaa ggaatgatgc ttgtacagaa cggtctcaag atcatgcgga 6060
gtgctctcag tgaaacagac ttggcggagc tgaaggacag gtttgctgta cacttgtcgc 6120
gccttgagga cgcagtttct catcttgcta gtttctctga taaaatctaa gattctcgtt 6180
gttaatgtac atccatcatg atttccaatt cagtttcttc ttagcgttga agtgaaatac 6240
cgttgtgatt gaggctgcta atatgctatg aatgactgga gcccaactta cagtgaatgc 6300
acatgaaagt aactttcttt cccaaatgga tttaccataa tactaaagtg tttttctgct 6360
ttcataaagt ttaatccctg cagaggacgc acacacact 6399
<210> 3
<211> 3138
<212> DNA
<213> 水稻
<400> 3
atggaggctg acggcggcgc cgccggcgag gaggcggagg agaggaggag gaggagcgag 60
ctcgggtccc tcgtggaagc catcaagtcc tccgaggttt tggagaacag aatttccctt 120
atcaaccaac tcgaggatcc ttttcagttg tgtgcagatg atctgggcct agtggttgaa 180
agtctgatcg catcgtggga tgattccaca tgttccggtg tatcacactg catgctacac 240
aagtcaattc tgcaggttgc tcttaaatgc tcagaattag atacaaccaa ttgcttgggg 300
ccatttctta ctcttggttc aaaggctggt tcgtggtgtg tgaggcatct cctgtggtct 360
gttgaatcta ttgatgaatc tgaagatgcc caagaggaag aacactccag attatttcct 420
gagataattg cactgacctt aaatatctct tccaagcacc tccctgttgc atctaaatgc 480
attgccgaag atactgtgca tgctgttggc gactttattt tggagttact aaccctgact 540
gaaagctcaa tacttgacaa gaaactcgga actacaggac atgttgctaa ggctgcacct 600
gtttttctag atgaaaccat caaactgtgc agagtgtact ccgaggctgc aaaatcagac 660
cagtgcataa tgagcatgcc taaagaagag acaactgagg aacacaaaga gacagatctt 720
actagcaaca ttgcccagat tacagcatgc actattcagt ccttgtgtaa aataggaacc 780
catgcagcat ccagtggtgg aagccaggtg attttactga atatatcatg gaagggcata 840
atttccttac tgcagcttgg taaagggatg gtagaagaaa aggtgaatgt aagagagatt 900
attttaattc ctatctcagt tgccattgaa tctctgaggg ttgctactga gagatggtgt 960
gtaccattac aagaagtcct tggtaccgct gaagctagaa gggctttctt accaatcaaa 1020
tatttcctaa cgaacgccgt taggatttgt tctatatatc catctgaaac aatggcaata 1080
tacaagagca taatccggtg tgcactgctg atttcacact caagtattct gttctgcaga 1140
aatccccagt tgaaagcagc aagtgaatta ctttttgagt tattggagcc tagttccttt 1200
cttctgttag acacacttat gaagtcaaca gaagtaagtc cagagtctaa atgccagctc 1260
gtgcagtact ttttggaaaa agtacgaacc ggtaatccag agtacaccgg agaagttgat 1320
catacaatga atttcgctac attgggttgc attttttctg tggattctga tgttgataat 1380
ataaacaggg cacttttacc tgctgaattt actgtgttct tgcacttcct caatgcttcc 1440
ccatggttga gggaagaggt ggtcattgaa ttatgtaaga agctacatct gtttcttaat 1500
attttaacgt tggaagatgt ctactcatat gtacttggct gccaaattcc tgcactaagt 1560
agtgatgatg attctcctaa ggttgtctgg caacctgtat atacttctct tatacaagcc 1620
ttgaagactt ttatgattgc tgcttcttct tcaagtgctg cttggagtga gtttgaagtc 1680
ttcttacttg agaacctttt ccatccccat ttcctttgct tggaaattct aacagagcta 1740
tggtgtttct tcatgcatta tgctgaagct gaaacttcaa cctatttaat caatcagcta 1800
tttcttctgt taaagactct agcgtcacca gaggaagttc ttgcacctct cagtgctctg 1860
aggaagcttg ctcgtgcatc atgtaacatc ttgagctatg catcgtctgc aacaattgat 1920
caaatttata ccatgctgaa tgatagctct tccaagtcat cgatcttgta cttagcactg 1980
ttgatggaag gatttccttt tgattcatta tctcgtggtg taaaggaaca tgctgtgaag 2040
acactgttca cttcttttgc tgggtatcta cagaatcaga actacttcaa gaatcatgga 2100
gaaatcaact tgccaacttc ttctagttcg ggcataatag ggtttcctgt acatgctcta 2160
gcctctgctt tccagagttg cgaaataaag gacgttacca ttgatgaaaa aagtattgct 2220
actatgttca agattgccac ctctctcatt aatctttata gaacttcacc tgatagcagt 2280
aagaacctcc ttgtcaagca catcagttcc atattggtta ttattacgca catgaggcat 2340
ctttgtgcgt tcagtgagtt ggagaagtta actttggagt tgcacactct gttcatgtcc 2400
agttttgata attcaaatac agcaatctct cagtgcaaac catcaatggc ttcatttatg 2460
gcaattcttg gtcacttgaa cactactgaa gacgatgcaa acccactttg ttctgcaatg 2520
tgggatctgt tccatttctt gctgagggag cggcattggg cactcattca ccttgcaatg 2580
ggttcctttg ggtactttgc cgctcgcact tcttttgcac agctctggaa atttgttcct 2640
gtagatgctg ccctttccta cacatgcaca ggggtggaca tagatgagga tgggtttatg 2700
tcagaattga aagccttcct tcagaaagag gtagccttgc gagatgacaa atggtctgaa 2760
gagcaaatat gttcactagt ttcagagggg agaatgctga agaaactggt tgaatcatgc 2820
ttggaaattc ctctagttcc agagcctgag aaagtttcaa ttactaatta tgtgaaaaca 2880
aagaaaagga agatgccaga tggaatttgt gaaggaatgc ctgagaatgt ttcagttact 2940
aatgatgtgg aaacaaagaa gaggaagatg ccagatagaa tttgtgaagg aatgatgctt 3000
gtacagaacg gtctcaagat catgcggagt gctctcagtg aaacagactt ggcggagctg 3060
aaggacaggt ttgctgtaca cttgtcgcgc cttgaggacg cagtttctca tcttgctagt 3120
ttctctgata aaatctaa 3138
<210> 4
<211> 713
<212> DNA
<213> 人工序列
<400> 4
gctcgacacg ctaagaagaa actgaattgg aaatcatgat ggatgtacat taacaacgag 60
aatcttagat tttatcagag aaactagcaa gatgagaaac tgcgtcctca aggcgcgaca 120
agtgtacagc aaacctgtcc ttcagctccg ccaagtctgt ttcactgaga gcactccgca 180
tgatcttgag accgttctgt acaagcatca ttccttcaca aattctatct ggcatcttcc 240
tcttctttgt ggatctggta cggaccgtac tactctattc gtttcaatat atttatttgt 300
ttcagctgac tgcaagattc aaaaatttct ttattatttt aaattttgtg tcactcaaaa 360
ccagataaac aatttgatat agaggcacta tatatataca tattctcgat tatatatgta 420
aatgagttaa cctttttttc cacttaaatt atatagggga tccacaaaga agaggaagat 480
gccagataga atttgtgaag gaatgatgct tgtacagaac ggtctcaaga tcatgcggag 540
tgctctcagt gaaacagact tggcggagct gaaggacagg tttgctgtac acttgtcgcg 600
ccttgaggac gcagtttctc atcttgctag tttctctgat aaaatctaag attctcgttg 660
ttaatgtaca tccatcatga tttccaattc agtttcttct tagcgtgtcg acc 713
Claims (5)
1.MEICA1蛋白在调控植物雄性育性中的应用;MEICA1蛋白为由序列表中序列1所示的氨基酸序列组成的蛋白质;所述植物为水稻。
2.一种培育雄性不育植物的方法,包括如下步骤:抑制目的植物中编码MEICA1蛋白的基因的表达,得到雄性不育植物;MEICA1蛋白为由序列表中序列1所示的氨基酸序列组成的蛋白质;所述植物为水稻。
3.如权利要求2所述的方法,其特征在于:编码MEICA1蛋白的基因为如下1)或2)或3)的DNA分子:
1)编码区如序列表中序列3所示的DNA分子;
2)序列表中序列2第1502-6170位核苷酸所示的DNA分子;
3)序列表中序列2所示的DNA分子。
4.一种培育花粉母细胞的染色体不能均等分离的植物的方法,包括如下步骤:抑制目的植物中编码MEICA1蛋白的基因的表达,得到花粉母细胞的染色体不能均等分离的植物;MEICA1蛋白为由序列表中序列1所示的氨基酸序列组成的蛋白质;所述植物为水稻。
5.如权利要求4所述的方法,其特征在于:编码MEICA1蛋白的基因为如下1)或2)或3)的DNA分子:
1)编码区如序列表中序列3所示的DNA分子;
2)序列表中序列2第1502-6170位核苷酸所示的DNA分子;
3)序列表中序列2所示的DNA分子。
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GenBank.PREDICTED: Oryza sativa Japonica Group uncharacterized LOC4331 594 (LOC4331 594),transcript variant X2, mRNA.《GenBank》.2016, * |
PREDICTED: Oryza sativa Japonica Group uncharacterized LOC4331 594 (LOC4331 594),transcript variant X2, mRNA;GenBank;《GenBank》;20160301;XM_01 5775523.1 * |
RNA干扰机制;王琦 等;《植物病理学研究进展》;中国农业科学技术出版社;20091031;RNA干扰机制 * |
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