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补偿标准是生态公益林生态补偿研究中的难点、重点和关键问题。文章定性论述了公益林生态补偿标准与其影响因素的关系。以补偿标准为因变量,以人均可支配收入、蓄积量、原木价格、林地投入、禁伐比例为自变量进行多元回归分析。结果显示:林地投入与补偿标准不显著,人均可支配收入、蓄积量、原木价格、禁伐比例与补偿标准存在较强的线性关系。 相似文献
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Sheng Teng Chaoguang Tian Mingsheng Chen Dali Zeng Longbiao Guo Lihuang Zhu Bin Han Qian Qian 《Euphytica》2006,152(2):141-148
Chlorate resistance is one of the reliable characters in Indica/Japonica classification. To understand the genetic basis of chlorate resistance is very important for revealing the evolutionary mechanism of Indica/Japonica differentiation. In this study, a doubled haploid (DH) population derived from anther culture of ZYQ8/JX17, a typical Indica and Japonica hybrid, was used as the genetic material to investigate chlorate sensitivity of the parents and DH lines. The quantitative trait loci (QTLs) of chlorate resistance were analyzed based on the molecular linkage map of this population. Total of 3 QTLs (qCHR-2, qCHR-8 and qCHR-10) for chlorate resistance were detected on chromosomes 2, 8 and 10, respectively. A QTL × QTL epistatic interaction was detected between qCHR-2 and qCHR-10. Genes involved in nitrogen assimilation, such as nitrate reduction, molybdenum cofactor biosynthesis and nitrate transport were strong candidates of QTLs for chlorate resistance. A putative nitrate reductase gene (8611.t00011), and two putative nitrate reductase genes (9319.t00010 and 9319.t00012) were in the genomic region of qCHR-2, and qCHR-8, respectively, and a putative nitrate transporter gene (756.t00011) was in the region of qCHR-10. The expression of 8611.t00011, 9319.t00010 and 756.t00011 were confirmed by the corresponding cDNAs, and 2 in/del and 12 SNPs in the coding regions of these three genes were found between Indica (cv. 9311) and Japonica (cv. Nipponbare) in silico. These results indicated that these three genes were candidates of the chlorate resistance QTLs. An in/del in the coding region of 8611.t00011 was used to develop a new PCR marker. A polymorphism was detected between JX17/Nipponbare and ZYQ8/9311. This polymorphism corresponds to the chlorate sensitivity of Nipponbare and 9311. This marker was located between Y8007R and RM250 on chromosome 2 in the DH population, where qCHR-2 was also located. 相似文献
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Effective cumulative temperature (ECT) after heading would be a more reasonable parameter for seed sampling of pre-harvest sprouting/seed dormancy (SD) tests in segregating populations than the days after flowering. SD is an important agronomic trait associated with grain yielding, eating quality and seed quality. To identify genomic regions affecting SD at different grain-filling temperatures, and to further examine the association between SD and ECT during grain-filling, 127 double haploid (DH) lines derived from a cross between ZYQ8 (indica)/JX17 (japonica) by anther culture were analyzed. The quantitative trait loci (QTLs) and their digenic epistasis for SD were identified using a molecular linkage map of this population. A total of four putative QTLs for SD (qSD-3, qSD-5, 6 and 11) were detected on chromosomes 3, 5, 6 and 11, together explaining 41.4% of the phenotypic variation. Nine pairs of digenic epistatic loci were associated with SD on all but chromosome 9, and their contributions to phenotypic variation varied from 2.87%–8.73%. The SD QTL on chromosome 3 was identical to the QTLs found in other mapping populations with different genetic backgrounds, which could be a desirable candidate for gene cloning and marker-assisted selection in rice breeding. 相似文献
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水稻Wx基因(CT)n微卫星标记与稻米淀粉品质的关系研究 总被引：21，自引：0，他引：21
利用引物４８４／４８５对龙特甫Ａｘ３７１Ｆ２群体的３６个单株进行Ｗｘ微卫星（ＣＴ）ｎ检测发现,微卫星标记是共显性标记,３种类型标记的分离比是８：１５：１３,符合盂德尔分离定律,进一步将同－Ｗｘ基因型植株上的种子混合测定淀粉品质,发现表观直链淀粉含量（ａｐｐａｒｅｎｔａｍｙｌｏｓｅｃｏｎｔｅｎｔ,ＡＡＣ）、糊化温度（ｇｅｌａｔｉｎｉｚａｔｉｏｎ ｔｅｍｐｅｒａｔｕｒｅ,ＧＴ）、胶稠度（ｇｅｌ ｃｏｍ 相似文献
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