遗传性状

In this paper, 12 years old Chinese Fir clones were studied on the genetic variation of growth properties, basic density and tracheid morphological characteristics. The main results were as follows.

本文综合研究了12年生杉木无性系试验林的生长性状、基本密度和管胞形态的遗传变异规律。

Eight provenances of 19-year-old Picea koraiensis Nakai from the provenance trials of Maoershan (45°20'N, 127°30'E), Liangshui (47°10'N, 128°53'E) and Jiagedaqi (50°24'N, 124°07'E) in Northeast China were investigated to analyze the genetic variation in growth characteristics and wood characteristics (tracheid length, tracheid diameter, tracheid wall thickness, annual ring width as well as wood density).

以来自中国东北地区帽儿山(45°20'N， 127°30'E)、凉水(47°10'N， 128°53'E)和加格达奇(50°24'N， 124°07'E)的19年生红皮云杉种源试验林8个种源为材料，测定和分析了种源间高生长、径生长和材质性状(管胞长度、管胞直径、年轮宽度和木材密度)的遗传变异。

Plant disease resistant reaction is a complex physiological process. To date, it has been found that many compounds are involved in the recognition of pathogens and following signaling transudation pathways.

中文题名水稻抗稻瘟病数量性状相关基因的鉴定与分析副题名外文题名 Identification and characteristics of quantitative trait loci associated genes resistant to rice blast disease in rice 论文作者郑先武导师朱立煌研究员学科专业遗传学研究领域\研究方向学位级别博士学位授予单位中国科学院遗传与发育生物学研究所学位授予日期2002 论文页码总数77页关键词水稻抗病基因稻瘟病馆藏号BSLW /2003 /S511 /97 植物对外界病原的抗性过程是一个复杂的生理现象。

Most variations of most bases arose from transition, and a few of them were transversion. Furthermore, there was great coherence among these changed bases in type

远缘杂交后代的进化可能是一个持续过程，姊妹系内的株系之间某些性状存在差异，这些差异很可能与重复序列的变异有关，这为后生遗传效应机制的研究提供了有用的材料。

Significant variation of flower size between different habitats in Trollius ranunculoides was found.

而且，植物大小与生理性状(如净光合速率、叶面积等)表现出显著的正的遗传

Sexual precocity is a complex character determined by polygenes.

性早熟在很大程度上与遗传密切相关，是一个由多基因决定的复杂性状。

A total of34 markers were found to be significant associated (P＜0.001 ) with the five grain color traits,which showed these traits were controlled by polygenes with minor effects.

不过各个位点的贡献率都比较小，表明在白米材料群体中，其颜色参数性状受微效多基因控制，其遗传方式比较复杂。

Accessions hybrid BC1 F2 were backcrossed, with two elite parents Diantun502 and Flcxi35 widely cultivated in Yunnan as recurrent parent, while 548 accessions core collection in Yunnan rice landrace as donors. Under natural low temperature 18.1℃ at booting stage, the genetic variation to main morphological characters of core collection hybrids in Yunnan rice landrace was analyzed between indica and japonica, rice cropping regions.

在昆明孕穗期平均温度181℃的自然低温下，以云南当家品种滇屯502和合系35作轮回亲本，以548份云南稻核心种质为供体亲本配制的杂种BC1F2（458份）为材料，按籼粳、稻作区进行云南稻核心种质杂种后代形态性状遗传变异研究。

Their six generations F1, F2, backcrosses B1 and B2 and their parents P1 and P2 were used to study the inheritance of eggplant fruit color traits with joint analysis of multiple generations.

以3个果色不同的茄子栽培种自交系为试验材料，用色差仪和目测相结合的方法将果色分级，通过P1、P2、F1、B1、B2和F26个世代联合分析法，研究茄子果色性状的遗传规律。

In this study, genetic analyses were conducted to determine the genetic basis in an elite resistant inbred line Siyi with complete resistance to maize dwarf mosaic. A new genetic model, two dominant complementary genes conditioning the resistance, were found by Mendelian genetic analysis based on parents, F1, F2 and backcrosses in three successive years' field trails. The two genes were further mapped near the centromere of chromosome 3 and 6, respectively by tightly linked microsatellite markers using 242 plants from F2 generation. The resistance gene on chromosome 3 is 1.0 cM apart from the flanking markers phi053 and umc1527, respectively. Whereas the linkage distance between two flanking markers bnlg1600 and phi075 and resistance gene on chromosome 6 was 1.0 and 4.0 cM, respectively. Genotypic analysis of the plants from testcross and F3 populations supported the new genetic manners.

课题组通过连续三年的抗病鉴定，在国内种质资源中筛选出一份综合农艺性状优良、配合力较高的自交系四一，三年的表型遗传研究和两年的分子标记工作，发现四一中的玉米矮花叶病抗性是由两对显性互补基因控制的，进而利用F2作图群体，把发现的两个基因定位在第三和第六染色体的着丝点附近，并获得了双侧紧密连锁的分子标记连锁图谱，其中第三染色体上的分子标记UMC1527和phi053从抗病基因双侧逼近1 cM，而第六染色体上的分子标记phi075、bnlg1600从抗病基因双侧分别逼近4 cM和1 cM；利用B2群体、F2：3家系、BC3F1群体和带有第三、第六染色体抗病基因以及两个抗病基因的近等基因系，进一步证实了四一中成株期抗性是由两个显性互补基因控制的。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。