大豆开花和成熟期显性E1等位基因关联分析

【目的】深入解析大豆开花期和成熟期的遗传基础,发掘控制性状的重要基因组区间,为分子标记辅助选择育种和新基因克隆提供依据。【方法】以224份携带显性E1等位基因的大豆种质为试验材料,在4个种植环境下调查表型数据,用R-mrMLM软件包中的6种多位点关联分析模型对大豆开花和成熟期进行全基因组关联分析。【结果】共检测到91个开花期和83个成熟期QTNs(quantitative trait nucleotides),其中6个开花期和10个成熟期QTNs能在多环境中检测到,这些环境稳定QTNs分布于15个区间大小在90~490 kb的单倍型(基因组)内,并新检测到6个基因组区间。【结论】显性E1等位基因背景下大豆开花和成熟期的QTN构成复杂,位于5号染色体39.52~40.01 Mb等15个基因组区间是该群体中控制大豆开花期或成熟期的重要位点。

A CLASS OF FUNCTIONAL EQUATION AND FRACTAL INTERPOLATION FUNCTIONS

Abstract A new class of functional equation in C 0(I) is investigated. It is proved that some class of FIF satisfies the functional equation. Another functional equation is constructed. Their solutions can approximate FIF arbitrarily. And a new approximate estimate between FIF and interpolated function is given.

HAAR EXPANSIONS OF A CLASS OF FRACTAL INTERPOLATION FUNCTIONS AND THEIR LOGICAL DERIVATIVES

In this paper,we study a special class of fractal interpolation functions,and give their Haar-wavelet expansions.On the basis of the expansions,we investigate the H(o|¨)lder smoothness of such functions and their logical derivatives of order α.

暗挖PBA车站深孔注浆堵水体系技术研究与实践

以北京地铁12号线和平西桥站车站主体设计采用2导洞洞桩法、竖井横通道采用台阶法且均采用止水施工为例,通过对富水地层暗挖车站的堵水体系技术方法进行研究和施工过程中的参数确定以及效果检测与验证,全面分析了暗挖车站止水施工在地铁施工过程中的适用性,可为今后类似工程提供宝贵经验。