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遮光对超级杂交稻叶片叶绿素含量的影响 总被引：1，自引：0，他引：1
为了探讨不同遮光条件下超级杂交稻剑叶的叶绿素含量动态变化特征,以超级杂交稻、普通杂交稻和高产常规稻代表品种为供试材料,设置齐穗后遮光30%、60%和不遮光3个处理。结果表明,不同遮光处理对叶绿素含量影响显著,超级杂交稻在齐穗后遮光其叶绿素a、叶绿素b和叶绿素a+b的含量均有所提高,其中叶绿素b含量增加的幅度高于叶绿素a;遮光处理对超级杂交稻类胡萝卜素含量的影响不明显;遮光处理降低超级杂交稻叶绿素a/b,超级杂交稻叶绿素a/b下降幅度要高于常规稻和普通杂交稻,这可能与超级杂交稻对环境适应能力的脆弱性有关。 相似文献
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Ding Shilin Liu Chaolei Shang Lianguang Yang Shenglong Zhang Anpeng Jiang Hongzhen Ruan Banpu Fang Guonan Tian Biao Ye Guoyou Guo Longbiao Qian Qian Gao Zhenyu 《水稻科学》2021,28(1):81-88
Cadmium(Cd)is a non-essential toxic metal that is harmful to plants.To investigate the genetic mechanism of Cd tolerance in rice,quantitative trait loci(QTLs)associated with Cd tolerance at the seedling stage were analyzed using a recombinant inbred line(RIL)population derived from a cross between PA64s and 93-11.A total of 36 QTLs associated with shoot length,root length,shoot dry weight,root dry weight and total dry weight were detected in Hangzhou and Lingshui of China.Among them,15 QTLs were identified under the control condition and 15 QTLs were identified under the Cd stress condition,and 6 QTLs for Cd tolerant coefficient were detected on chromosomes 1,3,7 and 9.The qCDSL1.1 and qCDSL1.2 were identified in Hangzhou and Lingshui,respectively,and had overlapping intervals on chromosome 1.To further confirm the effects of qCDSL1.1 and qCDSL1.2,we developed a chromosome segment substitution line(CSSL),CSSLqCDSL1,in 93-11 background harboring qCDSL1.1/qCDSL1.2 from PA64s.Compared to 93-11,CSSLqCDSL1 had increased shoot length under the Cd stress condition.These results pave the way for further isolation of those genes controlling Cd tolerance in rice and marker-assistant selection of rice elite varieties with Cd tolerance. 相似文献
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GUO Longbiao LUO Lijun Xing Yongzhong MEI Hanwei QIAN Qian YING Chunshan SHI Chunhai 《水稻科学》2002,10(3)
Grain yield in cereal crops was an etemal theme. 相似文献
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以高产恢复系“中413”为轮回亲本,导入来自149份供体亲本的遗传成份,育成约2500个株系的导入系群体。经目测选择粒长明显高于轮回亲本的株系并测量其粒长、粒宽,发现有667个株系的粒长超过7．0mm,粒长最大可达10．6mm,平均8．4mm;粒宽变幅为2．0-3．8mm,长宽比变幅为2．3-4．3,与轮回亲本相比粒型变化明显。在强水分胁迫条件下,导入系在卷叶级别和冠层温度等指标上有巨大变幅,发现有47个株系的卷叶级别和近100个株系的冠层温度低于轮回亲本,有16个株系的卷叶级别和冠层温度指标均低于耐旱对照品种“中旱3号”。 相似文献
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LV Yang WANG Yueying Noushin JAHAN HU Haitao CHEN Ping SHANG Lianguang LIN Haiyan DONG Guojun HU Jiang GAO Zhenyu QIAN Qian ZHANG Yu GUO Longbiao 《水稻科学》2019,26(6):384-392
Excavating single nucleotide polymorphisms(SNPs) significantly associated with rice grain shape and predicting candidate genes through genome-wide association study(GWAS) can provide a theoretical basis for discovery and utilization of excellent genetic resources in rice. Based on 16 352 SNPs, 161 natural indica rice varieties with various grain sizes in southern China were used for GWAS of grain shape-related traits, referring to grain length(GL), grain width(GW), 1000-grain weight(TGW), and grain length/width(GLW). Phenotypic statistics showed that coefficient of variation values for these four traits GL, GW, TGW and GLW were 9.92%, 9.09%, 20.20% and 16.38%, respectively. Each trait showed a normal distribution, and there was a certain correlation between these traits. Through general linear model correlation analysis, a total of 38 significant loci were identified, and a range of 100 kb upstream and downstream of the significant loci was identified as the candidate interval. On chromosome 3, GS3 and q GL3 were found to regulate GL. On chromosome 6, TGW6 and GW6 a were found to regulate TGW. Also, some QTLs related to grain shape were found on chromosomes 5 and 9. Besides that, using sequenced 3 K-germplasm resources, we found that there are 22 overlapped varieties between these two natural populations. Twenty-six SNPs and fourteen haplotypes were identified in five regions of GS3 genes. The detection of multiple candidate genes/QTLs within the candidate interval is beneficial for further excavation of superior rice genetic resources. 相似文献
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