共查询到19条相似文献,搜索用时 62 毫秒
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水稻多分蘖矮秆突变体d63的遗传分析与基因定位 总被引:1,自引:0,他引:1
多分蘖矮秆突变体d63来源于SARⅢ二倍体与明恢63杂交得到的双胚苗株系的自然突变。与野生型相比,其株高显著下降,分蘖明显增多,剑叶变细变短,结实率和千粒重均大幅下降。遗传分析表明,该突变性状受一对隐性单基因控制。该基因位于水稻第8染色体短臂上距离RM22195约0.4 cM的位置。用水稻基因组注释软件Rice Genome Annotation预测,发现从端粒区至RM22195间共有14 个注释基因,未发现已经报道的与株高、分蘖相关的同源基因。因此,推测D63可能是一个未被报道的新基因。 相似文献
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在自然光条件下水培籼稻品种Nankinkodo中,发现根为红色的自然突变体,命名为HG1。水培条件下该突变体在光照强度大于29 μmol/(m2·s)的可见光下,根开始转红,在光照强度为180 μmol/(m2·s)的可见光下,呈鲜红,具有明显的光照敏感性。遗传分析表明,该突变体光照敏感性的红根性状由1对显性基因控制, 暂命名为Lsr。利用微卫星标记将Lsr基因定位在第4染色体上RM252与RM303之间,遗传距离分别为9.8 cM和6.4 cM, 这为Lsr基因的精细定位和克隆奠定了基础。 相似文献
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LI Yun XU Pei-zhou ZHANG Hong-yu FU Shao-hong YANG Jin ZHANG Ru-quan WU Xian-jun 《水稻科学》2009,16(1):75-78
A spontaneous mutant with multiple stigmas (mst) was found in an indica rice line 466. The mst mutant exhibits normal at the vegetative development stage and produces normal inflorescence structures. The difference between the mutant and the wild type was observed when the stamen primordium began to develop. In the mst florets, palea and lemma opened, lodicules were homeotically transformed into palea/lemma-like structures, and stamens were homeotically transformed into carpel-like structures. It looked like multiple stigmas being full of the whole floret. The phenotypic changes of mst were very similar to that of B-like mutant spw1. Compared with other mutants with pistillate morphologies, the severe mst florets showed that the inner three floral organs were completely changed into palea/lemma-like structures. Moreover, the mutant was female sterile. Occasionally, with the changing environment, one or two stamens were fertile. Genetic analysis indicated that the mutant traits were controlled by a single recessive gene. 相似文献
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水稻花器官数目突变体fon6的研究初报 总被引:1,自引:0,他引:1
fon6是在籼稻恢复系乐恢188/明恢62杂交F3代发现的花器官数目突变体,表型分析结果表明:该突变体小花颖壳畸形扭曲、内颖长于外颖不闭合;每朵小花内外颖壳总数目2~4片;雄蕊数目为1~14枚;雌蕊数目增加,子房数目2~6个,胚囊畸形。突变体套袋自交结实率为14.06%,花粉活力较高,平均花粉可染率为91.86%。自交种子能正常萌发成苗,突变性状表现稳定的遗传特性。以突变体为父本分别与蜀恢527、明恢63杂交,F2代群体中正常株与突变株的分离均符合3∶1的比例,F3代及BC1F2代进一步的观察与统计结果均表明,该突变性状受1对隐性核基因控制,将该突变基因暂定名为fon6(floral organ number6)。 相似文献
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A double mutant with streaked leaf and abnormal floret was found and temporarily named streaked leaf and floral organ number mutant (st-fon).For this mutant,besides white streak appeared on culm,leaves and panicles,the number of floral organs increased and florets cracked.The extreme phenotype was that several small florets grew from one floret or branch rachis in small florets extended and developed into panicles.By using transmission electron microscope to observe the ultrastructure of white histocytes of leaves at the seedling stage,the white tissues which showed abnormal plastids,lamellas and thylakoids could not develop into normal chloroplast,and the development of chloroplast was blocked at the early growth stage of plastid.Scanning electron microscope and paraffin section were also used to observe the development of floral organs,and the results indicated that the development of floral meristem was out of order and unlimited,whereas in the twisty leaves,vascular bundle sheath cells grew excessively,or some bubbly cells increased.Genetic analyses carried out by means of cross and backcross with four normal-leaf-color materials revealed that the mutant is of cytoplasm inheritance. 相似文献
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LI Jin-bo XIA Ming-yuan WAN Bing-liang DU Xue-shu ZHA Zhong-ping YU Da-zhao QI Hua-xiong 《水稻科学》2009,16(1):79-82
A mutant with twisted hulls was found in a breeding population of rice (Oryza sativa L.). The mutant shows less grain weight and inferior grain quality in addition to twisted hulls. Genetic analysis indicated that the phenotype of mutant was controlled by a single recessive gene (temporarily designated as TWH). To map the TWH gene, an F2 population was generated by crossing the twh mutant to R725, an indica rice variety with normal hulls. For bulked segregant analysis, the bulk of mutant plants was prepared by mixing equal amount of plant tissue from 10 twisted-hull plants and the bulk of normal plants was obtained by pooling equal amount tissue of 10 normal-hull plants. Two hundred and seven pairs of simple sequence repeat (SSR) primers, which are distributed on 12 rice chromosomes, were used for polymorphism analysis of the parents and the two bulks. The TWH locus was initially mapped close to the SSR marker RM526 on chromosome 2. Therefore, further mapping was performed using 50 pairs of SSR primers around the marker RM526. The TWH was delimited between the SSR markers RM14128 and RM208 on the long arm of chromosome 2 at the genetic distances of 1.4 cM and 2.7 cM, respectively. These results provide the foundation for further fine mapping, cloning and functional analysis of the TWH gene. 相似文献
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The light-sensitive red-root mutant, designated as HG1, was newly observed from an indica rice variety, Nankinkodo, when seedlings were grown with roots exposed to natural light. The root color of the mutant began to turn slight-red when the roots were exposed to the light at the intensity of 29 μmol/(m2·s), then turned dark-red at the light intensity of 180 μmol/(m2·s), suggesting that the root color of the mutant was evidently sensitive to light. Furthermore, genetic analysis showed that the character of ... 相似文献
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A rice etiolation mutant 824ys featured with chlorophyll deficiency was identified from a normal green rice variety 824B.It showed whole green-yellow plant from the seedling stage,reduced number of tillers and longer growth duration.The contents of chlorophyll,chlorophyll a,chlorophyll b and net photosynthetic rate in leaves of the mutant obviously decreased,as well as the number of spikelets per panicle,seed setting rate and 1000-grain weight compared with its wild-type parent.Genetic analyses on F1 and F2 generetions of 824ys crossed with three normal green varieties showed that the chlorophyll-deficit mutant character was controlled by a pair of recessive nuclear gene.Genetic mapping of the mutant gene was conducted by using microsatellite markers and F2 mapping population of 495R/824ys,and the mutant gene of 824ys was mapped on the shon arm of rice chromosome 3.The genetic distances from the target gene to the markers RM218,RM282 and RM6959 were 25.6 cM,5.2 cM and 21.8 cM,respectively.It was considered to be a now chlorophyll-deficit mutant gene and tentatively named as chl11(t). 相似文献
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一个新的水稻叶绿素缺失突变基因的遗传分析和分子标记定位 总被引:4,自引:0,他引:4
从正常绿色水稻品种824B中发现1个黄化突变体824ys。该突变体具有叶绿素缺失突变特性,表现为植株黄绿色,分蘖数减少,生育期延长,总叶绿素、叶绿素a、叶绿素b的含量以及净光合速率比野生型亲本824B明显下降,每穗着粒数、结实率、千粒重等降低。对824ys与3个正常绿色品种杂交F1、F2的遗传分析表明,控制824ys的叶绿素缺失突变性状为1对隐性核基因。以495R/824ys F2作为定位群体,应用微卫星标记将824ys的叶绿素缺失突变基因定位于水稻第3染色体短臂,与RM218、RM282和RM6959等标记之间的遗传距离分别为25.6、 5.2和21.8 cM。认为该基因为一个新的水稻叶绿素缺失突变基因,暂命名为chl11(t)。 相似文献
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A spontaneous mutation,tentatively named d63,was derived from the twin-seedling progenies of rice crossed by diploid SARIII and Minghui 63.Compared with wild-type plants,the d63 mutant showed multiple abnormal phenotypes,such as dwarfism,more tillers,smaller flag leaf and reduced seed-setting rate and 1000-grain weight.In this study,two F 2 populations were developed by crossing between d63 and Nipponbare,d63 and 93-11.Genetic analysis indicated that d63 was controlled by a single recessive gene,which was located on the short arm of chromosome 8,within the genetic distance of 0.40 cM from RM22195.Hence,D63 might be a new gene as there are no dwarf genes reported on the short arm of chromosome 8. 相似文献
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Zhong-hua SHENG Xiang-jin WEI Gao-neng SHAO Jian SONG Ju LUO Pei-song HU Shao-qing TANG Li-yun CHEN 《水稻科学》2013,20(5):336-342
A new white striped leaf mutant wsl1 was discovered from Nipponbare mutated by ethyl methanesulfonate. The mutant showed white striped leaves at the seedling stage and the leaves gradually turned green after the tillering stage. The chlorophyll content of wsl1 was significantly lower than that of wild-type during the fourth leaf stage, tillering stage and booting stage. The numbers of chloroplast, grana and grana lamella were reduced and the thylakoids were degenerated in wsl1 compared with wild type. Genetic analysis showed that the wsl1 was controlled by a single recessive gene. Molecular mapping of the wsl1 was performed using an F2 population derived from wsl1/Nanjing 11. The wsl1 was finally mapped on the telomere region of chromosome 9 and positioned between simple sequence repeat markers RM23742 and RM23759 which are separated by approximately 486.5 kb. The results may facilitate map-based cloning of wsl1 and understanding of the molecular mechanism of the regulation of leaf-color by WSL1 in rice. 相似文献