基因组学与应用生物学
基因組學與應用生物學
기인조학여응용생물학
GENOMICS AND APPLIED BIOLOGY
2009年
1期
1-9
,共9页
赫圣博%何玮%陈红旗%朱旭东%杨军%胡筱荷%罗达
赫聖博%何瑋%陳紅旂%硃旭東%楊軍%鬍篠荷%囉達
혁골박%하위%진홍기%주욱동%양군%호소하%라체
水稻突变体%des2%des5%特性分析%定位
水稻突變體%des2%des5%特性分析%定位
수도돌변체%des2%des5%특성분석%정위
Rice mutants%des2%des5%Characterization%Mapping
小穗发育是决定水稻产量的主要农艺性状,鉴定控制小穗发育的关键基因对研究和分析调控农艺性状的分子机理是至关重要的.本文中,我们鉴定了一组小穗数目明显减少的突变体,命名为decteased spikelets(des),这里详细研究des2和des5两个突变体.结果显示des2是由单基因隐性位点控制,图位克隆将此位点定位到6号染色体的长臂上,并最终克隆了此基因,发现des2是moc1的一个新的等位突变体.定位克隆和序列分析显示在des5中,LAX基因的编码HLH(螺旋一环一螺旋)结构域的区域发生了一个点突变,暗示des5是lax的一个新的等位突变体.我们的结果暗示小穗和水稻叶腋分枝的发育受相同的遗传途径调控.
小穗髮育是決定水稻產量的主要農藝性狀,鑒定控製小穗髮育的關鍵基因對研究和分析調控農藝性狀的分子機理是至關重要的.本文中,我們鑒定瞭一組小穗數目明顯減少的突變體,命名為decteased spikelets(des),這裏詳細研究des2和des5兩箇突變體.結果顯示des2是由單基因隱性位點控製,圖位剋隆將此位點定位到6號染色體的長臂上,併最終剋隆瞭此基因,髮現des2是moc1的一箇新的等位突變體.定位剋隆和序列分析顯示在des5中,LAX基因的編碼HLH(螺鏇一環一螺鏇)結構域的區域髮生瞭一箇點突變,暗示des5是lax的一箇新的等位突變體.我們的結果暗示小穗和水稻葉腋分枝的髮育受相同的遺傳途徑調控.
소수발육시결정수도산량적주요농예성상,감정공제소수발육적관건기인대연구화분석조공농예성상적분자궤리시지관중요적.본문중,아문감정료일조소수수목명현감소적돌변체,명명위decteased spikelets(des),저리상세연구des2화des5량개돌변체.결과현시des2시유단기인은성위점공제,도위극륭장차위점정위도6호염색체적장비상,병최종극륭료차기인,발현des2시moc1적일개신적등위돌변체.정위극륭화서렬분석현시재des5중,LAX기인적편마HLH(라선일배일라선)결구역적구역발생료일개점돌변,암시des5시lax적일개신적등위돌변체.아문적결과암시소수화수도협액분지적발육수상동적유전도경조공.
Identification of key regulator genes in the control of spikelet development in panicle, one of the main agronomic traits to determine rice yield, is important to investigate the underlying molecular mechanism and provide the molecular basis for analysis of the agronomic traits. In this study, we have identified a group of mutants with conspicuous reduction of spikelet number, which are designated decreased spikelets (des). Two of the des mutants, des2 and des5, were analyzed in detail. We showed that a single recessive locus was responsible for des2 phenotype, which is located on the long arm of chromosome 6. The des2 locus was cloned and it was found that des2 is a new allele of moc1. Positional cloning and sequence analysis showed that there is a point mutation in the HLH do-main-encoding region of LAX gene in des5, indicating that des5 is a new allele of lax. Our data indicate that spikelet development is regulated by the same pathway in the control of development of axillary branches in rice.