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芸芥自交亲和系与自交不亲和系 sOD、POD和CAT酶活性 总被引:7,自引:1,他引:7
对芸芥( Eruca sativaMill)自交亲和系( SC)与自交不亲和系( SI)柱头SOD、POD和CAT三种酶活性进行 了测定。自交亲和系和自交不亲和系在授粉后都能引起SOD、POD和CAT三种保护性酶活性的变化。比较SC和 SI的酶活性发现,在未授粉时二者SOD酶活性差异显著,而POD和CAT酶活性则无显著性差异;异花授粉后SC 和SI的三种酶活性表现了相似的趋势,在各个时间段上无差异;自花授粉后自交亲和系的酶活性显著高于自交不 亲和系的酶活性。结果表明, SOD、POD和CAT三种酶活性的变化与自交亲和系所具有的自交亲和基因的调控有 关。 相似文献
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芸芥种质资源的遗传多样性研究 总被引:6,自引:0,他引:6
用100个随机引物对18份芸芥材料的基因组DNA进行扩增,结果有10个随机引物得到了稳定一致的RAPD谱带,每个引物扩增出2~17条谱带,共扩增出91条谱带.采用UPGMA法对扩增出的谱带进行遗传聚类分析,在遗传距离(D)=0.1333处,将18个芸芥材料分为2类8组,揭示了芸芥种质资源的遗传多样性. 相似文献
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PCR步行法克隆油菜自交不亲和基因 总被引:6,自引:0,他引:6
同源序列法与PCR步行法相结合,在油菜中克隆自交不亲和基因SLG和eSRK (extra-cellular SRK).所克隆的SLG序列长为882bp,克隆的eSRK序列长度分别为1495bp(青海大黄)、1494bp(黄籽沙逊)、1727bp(关中油白菜);其GeneBank登陆号分别为AY448025、AY448026、AY448027、AY448028、AY448029、AY448030.缺失突变可能是导致青海大黄和黄籽沙逊自交亲和的原因.克隆的SLG基因与甘蓝和白菜型油菜的SLG基因有很高的同源性,而eSRK基因与甘蓝和白菜型油菜的SRK基因的同源性较高.同源序列法与PCR walking法相结合,可以有效地克隆基因;但在克隆SLG基因的两翼序列时遇到了困难,说明PCR步行法仍有待改进. 相似文献
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芸芥木葡聚糖内糖基转移酶/水解酶基因EsXTH1的cDNA克隆和生物信息学分析1 总被引:1,自引:0,他引:1
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【目的】发掘与产量相关的穗粒性状QTL对进一步克隆和利用高产基因具有重要意义。【方法】以超级粳稻龙稻5号和典型高产籼稻中优早8号杂交衍生的重组自交系群体为试材,在4种环境下对穗部性状进行比较和QTL分析。【结果】共检测到63个穗部性状QTL,分布于除第9染色体外的11条染色体上。在4个环境下分别检测到27、27、18和35个QTL。其中,16个QTL能在2个环境下被检测到,12个在3个以上环境下稳定表达,分别占QTL总数的25.40%和19.05%;第1、3、4和5染色体的多效QTL簇能在不同环境下稳定表达,对穗部性状具有明显的调控作用。【结论】第3染色体STS3.3-STS3.6区间的qSNP3、第4染色体RM5688-RM1359区间的qSNP4.1是2个新的稳定表达的多效性QTL簇。此外,上位性效应是调控穗部性状的重要组分。 相似文献
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利用同工酶标记水稻亲本遗传差异及其在杂交水稻育种中的利用 总被引:2,自引:0,他引:2
利用淀粉凝胶和聚丙烯酰胺凝胶电泳显示的同工酶差异,分析17个杂交水稻亲本、3个新株型株系和22个光壳稻、爪哇稻品种的遗传差异,研究光壳稻和爪哇稻及其与温带粳稻之间的关系,探索同工酶标记水稻亲本遗传差异在杂交稻育种中利用的可能性。在本研究中,8个同工酶18个多态性位点至少在2个基因型间存在差异。每个具有多态性的酶谱带分别以1和0记录存在与否,由同工酶数据计算的Nei’s遗传距离创建聚类树状图。聚类分析结果表明,籼稻和粳稻容易被分开,普通粳稻与光壳稻、爪哇稻混合聚在一起;光壳稻与爪哇稻之间的遗传距离要比它们与普通粳稻之间的遗传距离小。利用光壳稻、爪哇稻选育不同生态群方向的恢复系和不育系,已配组育成了强优势的杂交稻组合。 相似文献
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《Plant Production Science》2013,16(1):139-145
AbstractThe seedlings of Oryza sativa L. cv. Nipponbare grown by hydroponic culture for 3 wks were treated with 75, 100, 150 and 200 mM NaCl for 14, 14, 6 and 3 days, respectively, and examined for chloroplast ultrastructure in the region where chlorophyll fluorescence had been recorded. NaCl treatment decreased the ratio of variable to maximum chlorophyll fluorescence yield (Fv/Fm) and caused swelling of thylakoids. The swelling of thylakoids was quantified by the percentage of the length of swollen thylakoids to the total length of thylakoids. This value was increased with increasing NaCl concentration. Although Fv/Fm decreased at all concentrations of NaCl, the minimal fluorescence yield F0 was not increased by the treatment with 75 or 100 mM NaCl. The percentage of the length of swelling was low at 75 and 100 mM NaCl. On the other hand, F0 increased and the swelling of thylakoids was prominent with 150 and 200 mM NaCl treatment. These results suggest that the decrease in Fv/Fm due to the increase in F0 under salt stress correlates with the ultrastructural damage. The decrease in Fv/Fm due to the increase in F0 is expected to be useful as an indicator to evaluate the damage in chloroplasts, especially in thylakoid membranes, under salinity. 相似文献
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《Plant Production Science》2013,16(3):322-328
AbstractStomatal conductance (gs) is an important trait responsible for the genotypic difference in gas diffusion for photosynthesis and transpiration in rice (Oryza sativa L.). We measured gs, stomatal density and stomatal length (guard-cell length) at two weeks before heading for 64 accessions from a rice diversity research set of germplasm (RDRS) and for three high-yielding cultivars (HYC) under field conditions. Considerable variations in gs, and stomatal length were observed among varieties in RDRS, and it was considered that RDRS covers the species diversity of the stomatal characteristics in rice. When it was compared among the varieties with similar plant earliness, gs was higher in HYC than in most varieties of RDRS. Stomatal density did not correlate with gs, and there was a negative correlation between stomatal density and stomatal length. However, noticeable variance existed in the latter relation, where HYC exhibited a higher stomatal density and slightly shorter stomatal length than RDRS. High gs in HYC is attributable to their high stomatal density and moderate specific stomatal conductance (gs / stomatal density) while the high-gs varieties in RDRS tended to have a lower stomatal density and higher specific stomatal conductance. Stomatal length is related to specific stomatal conductance, but there are remarkable differences between these traits. Specific stomatal conductance in HYC has not reached the upper limit for their stomatal size, which raises a possibility of further improvement of HYC in gs. 相似文献