中国水稻科学
中國水稻科學
중국수도과학
CHINESE JOURNAL OF RICE SCIENCE
2014年
2期
111-118
,共8页
魏祥进%宋建%刘胜%邵高能%圣忠华%唐绍清%胡培松
魏祥進%宋建%劉勝%邵高能%聖忠華%唐紹清%鬍培鬆
위상진%송건%류성%소고능%골충화%당소청%호배송
水稻%叶绿素缺乏%温度敏感突变%基因定位
水稻%葉綠素缺乏%溫度敏感突變%基因定位
수도%협록소결핍%온도민감돌변%기인정위
rice%chlorophyll deficient%thermo-sensitive mutant%gene mapping
从粳稻品种 Asominori 的组培后代中发现了一个温度敏感的叶绿素缺乏突变体.低温(23℃)条件下该突变体幼苗3叶期前表现为白化表型随后致死,但在正常温度条件下与野生型无明显差异(30℃).与野生型相比,该突变体幼苗低温条件下叶绿素含量明显下降,叶绿体结构发育异常.遗传分析结果表明,该突变体受一对隐性核基因控制,定名为 cde2(chlo-rophyll deficient 2)基因.从 cde2与籼稻品种培矮64衍生的 F2群体中挑选1064株表现为突变表型的单株进行基因定位,将该基因初步定位于水稻第1染色体的着丝粒附近,随后利用已有的 SSR 标记和自行开发的 Indel 标记,进一步将该基因定位在标记 RM11041和 Indel1之间,物理距离为365.6 kb.此外,对该突变体叶绿素合成、光合作用以及质体转录/翻译系统相关基因的表达量测定表明,CDE2突变后增加了与叶绿素合成和质体转录/翻译相关基因的表达,但降低了光合作用相关基因的表达.结果表明,CDE2在水稻叶绿素合成以及叶绿体的发育过程中起着重要的作用.
從粳稻品種 Asominori 的組培後代中髮現瞭一箇溫度敏感的葉綠素缺乏突變體.低溫(23℃)條件下該突變體幼苗3葉期前錶現為白化錶型隨後緻死,但在正常溫度條件下與野生型無明顯差異(30℃).與野生型相比,該突變體幼苗低溫條件下葉綠素含量明顯下降,葉綠體結構髮育異常.遺傳分析結果錶明,該突變體受一對隱性覈基因控製,定名為 cde2(chlo-rophyll deficient 2)基因.從 cde2與秈稻品種培矮64衍生的 F2群體中挑選1064株錶現為突變錶型的單株進行基因定位,將該基因初步定位于水稻第1染色體的著絲粒附近,隨後利用已有的 SSR 標記和自行開髮的 Indel 標記,進一步將該基因定位在標記 RM11041和 Indel1之間,物理距離為365.6 kb.此外,對該突變體葉綠素閤成、光閤作用以及質體轉錄/翻譯繫統相關基因的錶達量測定錶明,CDE2突變後增加瞭與葉綠素閤成和質體轉錄/翻譯相關基因的錶達,但降低瞭光閤作用相關基因的錶達.結果錶明,CDE2在水稻葉綠素閤成以及葉綠體的髮育過程中起著重要的作用.
종갱도품충 Asominori 적조배후대중발현료일개온도민감적협록소결핍돌변체.저온(23℃)조건하해돌변체유묘3협기전표현위백화표형수후치사,단재정상온도조건하여야생형무명현차이(30℃).여야생형상비,해돌변체유묘저온조건하협록소함량명현하강,협록체결구발육이상.유전분석결과표명,해돌변체수일대은성핵기인공제,정명위 cde2(chlo-rophyll deficient 2)기인.종 cde2여선도품충배왜64연생적 F2군체중도선1064주표현위돌변표형적단주진행기인정위,장해기인초보정위우수도제1염색체적착사립부근,수후이용이유적 SSR 표기화자행개발적 Indel 표기,진일보장해기인정위재표기 RM11041화 Indel1지간,물리거리위365.6 kb.차외,대해돌변체협록소합성、광합작용이급질체전록/번역계통상관기인적표체량측정표명,CDE2돌변후증가료여협록소합성화질체전록/번역상관기인적표체,단강저료광합작용상관기인적표체.결과표명,CDE2재수도협록소합성이급협록체적발육과정중기착중요적작용.
A thermo-sensitive chlorophyll deficient mutant was obtained from the progeny of tissue culture of a japonica rice cultivar Asominori.The mutant was characterized by albino leaves before 3-leaf stage under low temperature (23℃),while showing normal phenotype under high temperature(30℃).The chlorophyll contents of the mutant were significantly lower than those of wild-type before 3-leaf stage under low temperature,which is due to altered chloroplast development under low temperature.Genetic analysis showed that the mutation was controlled by a single recessive gene,which is tentatively designed as cde2 (chlorophyll deficient 2 ).Furthermore,using an F2 population derived from cde2/Peiai 64 and polymorphic markers between cde2 and Peiai 64,the cde2 was finally localized on the centromeric region of chromosome 1 and positioned between SSR markers RM1 1041 and Indel1 ,within the physical distance about 365 .6 kb.In addition, the expression level of genes associated with chlorophyll biosynthesis, photosynthesis and plastidial transcription/translation apparatus was measured and the results shows that the cde2 mutation increased the transcript level of chlorophyll biosynthesis genes and the platidial transcription/translation apparatus related genes,but reduced the expression level of photosynthesis genes,indicating that CDE2 may involve in the chlorophyll biosynthesis and chloroplast development.