遗传性状

In this paper, major agronomic traits and grain quality traits affecting rice yield and grain quality were investigated in seven aromatic rice maintainer lines bred in Sichuan and one variety introduced from America. It was aimed at estimating the numbers of gene controlling aroma, the allelism of aroma genes, location of aroma gene on the chromosome, and molecular tagging of aroma gene.

本研究利用四川新育成的七个香稻保持系(D香1B、D香2B、内香2B、内香4B、绵香2B、绵香3B、宜香1B)、一个香稻引进改良品种(泸香90)和一个非香型保持系为材料，研究了香稻保持系主要农艺性状和品质性状对品质、产量的影响，并且通过杂交群体构建对香稻香味性状进行了遗传分析。

The seeds could not be stored for a long time and the number of germination was 50% or so when seeds were cold stored . We can infer through analyzing the inheritance of some character of Gerbera jamesonii that the expression of red flower color of hybrids somewhat trended to that of female parents , plant height、flower diameter and flower doubleness had a declined tendency .

通过对杂交组合F1代的部分性状遗传变异情况分析可知：非洲菊舌状花瓣的红色具有偏母性遗传的倾向；单瓣性具有一定的遗传优势，重瓣型不具有遗传优势；杂交F1代的株高和花径呈趋小性衰减的趋势。

Most of rice traits are quantitative for example yield,quality and stress resistent, which are controlled by polygene.

水稻的大多数性状如产量、品质、抗逆性等多为数量性状，因此对数量性状基因位点进行鉴定在水稻遗传育种上具有重要意义。

At present, the research at pubescence character concerns mainly on cotton, tomato, tea and other crops, but the research on soybean pubescence is not much.

为了探讨大豆无茸毛性状的遗传规律及寻找与大豆无茸毛性状连锁的分子标记，加快无茸毛性状的利用进程。

The results indicated that there existed significant variation for the density of glandular trichome among different parents and different individuals of F2 generation.

研究结果表明：烤烟腺毛密度在亲本间和杂交组合F2代个体间存在着较大的遗传变异，F2代不同个体腺毛密度的次数分布经卡方测验符合正态分布曲线，说明腺毛密度具有数量性状的遗传特征，其广义遗传率和狭义遗传率分别为83.3%和26.6%。

Genetic cluster analysis is similar based on the results of morphological and DNA markers, the five populations could be divided into three groups. But there are different groups sort of individual locations, reflecting the similarities and difference about the analysis of the relationship between population with the two kinds of markers, It could be concluded that there was coupling and relevance to some extent in evaluating genetic diversity with the same experiment sampling by morphological and SSR marker variation. However, there was also differences. In research, the two can complement each other.8. Identification of Genetic Relationship of Amygdalus plants by SSRThe genetic relationship among 55 Amygdalus plants collections, belonging to 6 species and collected from both homeland and abroad were identified via SSR molecular marker technique.

新疆野扁桃遗传多样性不同研究分析方法结果的比较与评价表型与DNA二种水平的遗传标记方法揭示的遗传多样性水平有差异，表型性状比DNA分子标记具有更大的变异性；其受到环境的影响较大，也即对环境更敏感。2种水平的遗传标记聚类结果将野扁桃5个不同分布群体均可分为3个大类群，但是出现有个别不同的群体排序位置，反映了2种标记在分析种群间关系上的异同性，从本研究结果来看，说明表型与DNA标记有一定的耦合性和相关性，但也存在差异，在研究上可以互为补充。8。

The phenotypic mean values for the three populations and the midparental heterosis values for the two backcross populations were used for quantitative trait locus mapping and analysis, the genetic basis and correlations betweent the traits were analysed.

将三个群体的表型值和两个回交群体的中亲优势值进行了数量性状位点(quantitative trait locus，QTL)的检测及效应分析，初步分析了持绿性、充实度和产量等农艺性状的遗传基础和各性状间的相关关系。

The major agronomic characters, morphology and the genetic stability of polyembryonic seedling of the mutant line were systematically investigated. The results are as follows. The agronomic characters of IR36-Shuang were obvious different with its parent IR36-4X. The plant height, panicle length, 1000 grain weight and the setting rate of the IR36-Shuang were lower than that of its parent by 35.41%、5.08%、15.72% and 12.39%, respectively.

对该突变株后代的主要农艺性状、多胚苗形态特征和遗传稳定性进行研究表明，突变株系与其原始亲本在主要农艺性状上存在明显差异，前者在株高、穗长、千粒重和结实率等性状上比后者分别下降35.41%、5.08%、15.72%和12.39%。

Further studies showed some DH plants could generate two or more than two stems in which wrinkledness mutant and wild types except for the leaf wrinkledness, therefore they were the better materials for studying the wrinkledness characteristic. The finding is useful in studying, locating and cloning the wrinkledness gene linked to leaf mutants of Brassica allosextuple CGMCC № 2553 DH lines in the future.

进一步研究发现，在同一DH再生植株上常常会萌发出皱缩和野生型的2个或多个分枝，由于皱缩和野生型除了叶片皱缩性状不同外，其他性状完全相同，因此叶片突变体和野生型是研究叶片皱缩性状的理想材料，有利于进一步研究皱缩基因的遗传，定位、克隆叶片皱缩相关基因。

Most traits for crop breeding are quantitative in nature, which are controlled by polygenes. It is very important for crop improvement to accurately identify and finely map quantitative trait loci.

农作物大多数性状都是由多基因控制的数量性状，对数量性状基因座(quantitative trait loci， QTL)进行鉴定和定位对作物遗传育种具有重要意义。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。