共查询到10条相似文献，搜索用时 125 毫秒
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利用超级杂交稻协优9308（协青早B×中恢9308）衍生的重组自交系群体,采用条件复合区间作图法对主茎叶片数进行了动态QTL分析。在各时期检测到5个非条件QTL和2个条件QTL。非条件QTL qLN2.1、qLN2.2、qLN2.3和qLN2.4在第2染色体上成簇分布,单个非条件QTL可解释的表型变异介于11.68%～16.48%。2个条件QTL qLN2.2和qLN2.4表达时段与拔节盛期和抽穗盛期一致。最终只检测到1个叶片数非条件QTL,没有一个叶片数条件QTL能在测定的所有时期都有效应。表明控制水稻叶片数的QTL表达具有时空性。 相似文献
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Panicle angle (PA) of 254 recombinant inbred lines derived from a cross between two japonica varieties Xiushui 79 and C Bao was investigated under four environments,and a genetic linkage map including 111 SSR markers was constructed.Genetic analysis was conducted by mixed major gene plus polygene inheritance models,and quantitative trait loci (QTLs) identification by the QTLNetwork 2.0 and the composite interval mapping approach of WinQTLCart 2.5 software.Results showed that the PA trait was controlled by two major genes plus polygenes,mainly by major genes.Eight QTLs for PA were detected by the QTLNetwork 2.0 software,and each locus explained 0.01% to 39.89% of the phenotypic variation.Twelve QTLs for PA were detected by the WinQTLCart 2.5 software,with each locus explaining 2.83% to 30.60% of the phenotypic variation.Two major QTLs (qPA9.2 and qPA9.5) distributed between RM3700 and RM3600 and between RM5652 and RM410,respectively,and a moderate QTL (qPA9.7) distributed between RM257 and OSR28,were both detected by the two methods in all of the four environments.The negative effect alleles of the three QTLs were from Xiushui 79.In addition,eight pairs of epistatic QTLs with minor effects were also detected.QTL × environment interactions were not significant for additive QTLs and epistatic QTL pairs. 相似文献
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The QTL qHUS6 for hull silicon content in rice was previously located on the short arm of rice chromosome 6.By using an F2:3 population segregating in the RM587-RM19784 region harboring qHUS6 in an isogenic background,two QTLs for hull silicon content were detected,of which qHUS6-1 was located in the distal region and qHUS6-2 in the region proximal to the centromere.Three rice plants carrying small heterozygous segments in the target region were selected,of which two covered the qHUS6-1 region and the other... 相似文献
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Alpana Anupam Jahangir Imam Syed Mohammad Quatadah Anantha Siddaiah Shankar Prasad Das Mukund Variar Nimai Prasad Mandal 《水稻科学》2017,24(1):10-20
We genotyped 74 rice germplasms including Tripura's local landraces, improved varieties, cultivars and breeding lines and other rice varieties using molecular markers for genetic diversity, drought QTLs, and blast resistance genes. The number of alleles per locus ranged from 2 to 5 with an average of 2.9. The polymorphic information content value per locus ranged from 0.059 (RM537) to 0.755 (RM252) with an average of 0.475. Cluster analysis based on 30 simple sequence repeat markers revealed 5 clusters and also indicated the presence of variability within the rice accessions. The drought QTL qDTY2.1 was found in 56.0% of germplasms and qDTY1.1 was detected in only 6.8% of the germplasms. Out of seven rice blast resistance genes screened, only two rice varieties, RCPL-1-82 and Buh Vubuk (Lubuk), were positive for four blast resistance genes while only Releng possessed two blast resistance genes. Among 74 rice germplasms, only three accessions, Releng, RCPL1-82 and Buh Vubuk (Lubuk), possessed both drought-related QTLs and blast resistance genes. Overall, the 74 indigenous rice genotypes showed low level of genetic diversity, which is in contrast to high level of genetic diversity among rice varieties in northeast India, where highlights the good farming practice, conservation of germplasms and the limitation of molecular markers employed in this study. The presence of both drought related QTLs and blast resistance genes in some of the germplasms can be useful in future breeding programmes. 相似文献
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【目的】挖掘新的稻米品质性状QTL并利用分子育种技术改良稻米品质。【方法】利用构建的一套以籼稻香型恢复系昌恢121为背景亲本,以优质粳稻越光为供体亲本的染色体片段代换系（CSSLs）为材料,在4个环境下对稻米品质性状进行QTL检测及稳定性分析。【结果】在4个环境下共检测到44个QTL,其中6个QTL能在多个环境下被检测到;第2、3、5、6和10染色体上存在多效QTL簇,对稻米品质性状具有明显的调控作用;第1、6和12染色体上7个QTL能在不同环境下稳定表达。【结论】第1染色体RM3143-RM1117区间qPGWC1和第12染色体RM3331-RM5479区间qPaT12是两个新的稳定表达QTL。 相似文献
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在4个环境下种植直立穗粳稻品种秀水79与弯曲穗品种C堡及两者杂交后衍生得到的RIL群体254个株系并调查其穗角,运用主基因+多基因混合遗传模型对穗角性状进行遗传分离分析;运用基于混合线性模型的QTLNetwork 2.0软件和基于多元回归模型的WinQTLcart 2.5软件的复合区间作图法,对穗角性状进行QTL定位。结果发现,1）穗角性状受两对主基因+多基因共同控制,以主基因遗传为主;2）QTLNetwork 2.0检测到8个控制穗角性状的加性QTL,解释表型变异的0.01%~39.89%;WinQTLcart 2.5检测到12个控制穗角性状的加性QTL,可解释表型变异的2.83%~30.60%。检测到的所有QTL分布于第4、5、6、7、9、11染色体上,其中分布于RM3700-RM3600和RM5652-RM410区间的两个主效位点qPA9.2和qPA9.5,以及分布于RM257-OSR28区间的qPA9.7 在两种方法和4个环境下均检测到,减效等位基因来自秀水79;3）检测到8对加性×加性上位性互作位点,解释表型变异的0.36%~1.71%。检测到的各个加性和上位性位点均不存在显著的基因型与环境的互作。 相似文献
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不同环境下稻米品质性状QTL的检测及稳定性分析 总被引：1，自引：0，他引：1
【目的】挖掘新的稻米品质性状QTL并利用分子育种技术改良稻米品质。【方法】利用构建的一套以籼稻香型恢复系昌恢121为背景亲本，以优质粳稻越光为供体亲本的染色体片段代换系（CSSLs）为材料，在4个环境下对稻米品质性状进行QTL检测及稳定性分析。【结果】在4个环境下共检测到44个QTL，其中6个QTL能在多个环境下被检测到；第2、3、5、6和10染色体上存在多效QTL簇，对稻米品质性状具有明显的调控作用；第1、6和12染色体上7个QTL能在不同环境下稳定表达。【结论】第1染色体RM3143−RM1117区间qPGWC1和第12染色体RM3331−RM5479区间qPaT12是两个新的稳定表达QTL。 相似文献
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ZHANG Ya-dong ZHANG Ying-hui DONG Shao-ling CHEN rao ZHAO Qing-yong ZHU Zhen ZHOU Li-hui YAO Shu ZHAO Ling YU Xing WANG Cai-lin 《水稻科学》2013,20(6):400-406
Grain size traits, including grain length, grain width and grain thickness, are controlled by quantitative trait loci （QTLs）. Many QTLs relating to rice grain size traits had been reported, but their control mechanisms have not yet been elucidated. A recombinant inbred line （RIL） population of 240 lines, deriving from a cross between TD70, an extra-large grain size japonica line with 80 g of 1000-grain weight, and Kasalath, a small grain size indica variety, were constructed and used to map grain size QTLs to a linkage map by using 141 SSR markers in 2010 and 2011. Five QTLs for grain length, six for grain width and seven for grain thickness were detected distributing over chromosomes 2, 3, 5, 7, 9 and 12. Seven QTLs, namely qGL3.1, qGW2, qGW2.2, qGW5.1, qGW5.2, qGT2.3 and qGT3.1, were detected in either of the two years and explained for 56.19%, 4.42%, 29.41%, 10.37%, 7.61%, 21.19% and 17.06% of the observed phenotypic variances on average, respectively. The marker interval RM1347-RM5699 on chromosome 2 was found common for grain length, grain width and grain thickness; qGL3.1 and qGT3.1 were mapped to the same interval RM6080-RM6832 on chromosome 3. All 18 QTL alleles were derived from the large grain parent TD70. Most of the QTLs mapped in the present study were found the same as the genes previously cloned （GW2, GS3 or qGL3, GW5 and GS5）, and several were the same as the QTLs （GS7 and qGL-7） previously mapped. Three QTLs, qGL2.2 on chromosome 2, qGW9 and qGT9 on chromosome 9, were first detected. These results laid a foundation for further fine mapping or cloning of these QTLs. 相似文献
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Leina Zheng Wenwei Zhang Shijia Liu Liangming Chen Xi Liu Xingang Chen Jing Ma Weiwei Chen Zhigang Zhao Ling Jiang Jianmin Wan 《Journal of Cereal Science》2012
A backcross inbred line population derived from a cross between Koshihikari and Kasalath was used to dissect the genetic relationship among chalkiness, protein content, and paste viscosity properties in rice in three environments. A total of 11 traits (or parameters) were analyzed, including percentage of grains with chalkiness (PGWC), protein content (PC) and protein index (PI), and eight parameters from the viscosity profile. PGWC, PC and PI were significantly correlated with the paste viscosity parameters. We identified 39 QTLs in three environments; ten QTL clusters emerged. Eight QTLs were consistently detected across the three environments and further confirmed using a set of chromosome segment substitution lines (CSSLs) where Kasalath was used as the donor parent and Koshihikari as the recurrent parent. One and two major clusters on chromosome 6 corresponded to the Wx and Alk loci, respectively. The former was responsible for PGWC and most of the viscosity parameters, and the latter for PI and some viscosity parameters. Particularly, QTL qPI-6.1 was linked with both the Wx and Alk loci. The co-locations of QTLs for PGWC and viscosity parameters and the linkage of qPI-6.1 and qBDV-6 at the Wx locus could be largely responsible for the phenotypic correlations between these traits. 相似文献