遗传性状

The inheritance of poly-eggs was investigated by crossing and reciprocally crossing APIV with monoembryonic rice variety IR36,Minghui No.77 and Longtepu B,respectively.It was suggested that the production of poly-eggs is probably controlled by gametophytic genotypes,rather than sporophytic ones.

通过多胚水稻品系APⅣ与单胚水稻品种IR36、明恢77和龙特浦B正反杂交，研究APⅣ的多卵遗传行为，表明APⅣ的多卵性状可能不是由孢子体基因型决定的，而是由雄配子体基因型决定，属配子体遗传的范畴。

Dynamic inheritance of rice allelopathy on the root length of receiver plant lettuce (Lactuca sativa L.) and its genotype×environment effects were analyzed by using additivedominant developmental genetic models.

采用包括基因型与环境互作的数量性状加性—显性发育遗传模型，分析了供试水稻对受体植物莴苣幼苗根长化感作用的动态遗传及与环境的互作效应。

So it is very necessary to study variances of Chinese Meretrix meretrix germplasm resources and their molecular genetic bases for their lasting utilization,sustained and healthy development of aquaculture industry. In this study, the genetic bases and their variances of representative populations of Meretrix clam were investigated through phenotypic traits and on the molecular level by quantitative genetic methods and molecular marker analysis technique.

本研究从表观性状和分子水平上探测我国文蛤种质资源的遗传基础和变异水平，旨在深入了解我国文蛤的种质状况并为其保护和可持续利用提供依据；在此基础上，通过杂交选择育种实践，分析和探讨文蛤由此获得杂种优势水平，为养殖文蛤的遗传改良和新品种培育提供理论指导。

A mispairing PCR-RFLP technique was applied in this study to determine the Insulin-like Growth Factor 2(IGF2) gene intron3 G3072A mutation in an outbred Landrace and Large White, and the gelded boars from Landrace×Large White cross. The difference of corresponding traits and the genetic effects of the boars inherited from parental A allele and inherited from parental G allele were analyzed.

采用错配PCR-RFLP技术鉴别了长白猪和大白猪纯种以及长白×大白猪杂交后代去势公猪胰岛素样生长因子2(IGF2)基因内含子3的3072位点变异，分析了遗传来自父本不同等位基因个体间的相关性状差异及不同等位基因的遗传效应。

The leaf angle and leaf reclinate value were all belong to quantitative trait, and heritability ratio were in the middle.

叶片夹角和披垂值均具有数量性状遗传特征，遗传率中等。

In this paper, 35 Tupaia blangeri chinensises captured from Kunming,Yunnan province were investigated. We analyzed hereditary conditionality index about some morphological characters. According to Rife-Buranamanas law, We analyzed the appearance characteristics with hereditary conditionality including color of fur, orbit etc.. The results showed the following: wild fur with seasonal red spot, white fur of abdomen, non-white orbit, fleshcolor palm, non-cocked ear, round tip tail, and the line between the breasts of both sides in a vertical position with axis line.

主要以上海市肿瘤研究所购自云南昆明地区的35只中缅树鼩及其实验室条件下繁殖的G1代为试验素材，对涉及形态性状遗传制约性的一些指标进行分析，应用Rife-Buranamanas 定律分析中缅树鼩涉及毛色等诸多具有遗传制约性的外貌特征的显隐性关系，得出中缅树鼩典型的外貌特征为野生型毛色有季节性红斑、白腹、没有白眼圈、掌底肤色为肉色、耳朵不竖、圆形的尾尖、两侧乳房每对之间的连线分别与体轴线垂直。

Thus, quantitative traits obey the mixed major gene plus polygenes inheritance model. The model was first introduced and then developed in human and animal genetic studies.

近年的育种实践、QTL定位和一系列遗传研究结果与经典数量遗传学的多基因假说相佐，认为数量性状是由若干效应大小不同的基因所控制，即认同主基因+多基因混合遗传模式。

The inheritance of branch number and length of maize tassel was re-studied by means of a mixed inheritance models of quantitative traits of a major gene plus polygene based on parents, F_1, F_2 and backcrosses from two different combinations of maize.

以478×CMI312和丹340 ×CML322等两个组合的 6个世代（P_1，P_2，F_1，F_2，B_1，B_2）为材料，采用数量性状的主基因－多基因混合遗传模型，重新研究了玉米雄穗分枝数和雄穗长度的遗传。

The research progress in genetic linkage map construction of forest tree species both at home and abroad were reviewed in the paper.Two main problems involved in the field were discussed.One was the limitation of the number of individuals of mapping populations and the other was the random markers mostly employed by the majority of studies.These problems have resulted in crossing combination specificity in the constructed maps and the QTLs located on the basis of the maps.As a result,the QTLs discovered up to now have low credibility and poor practicability in marker-assisted selection.

本文就目前国内外林木连锁遗传图谱领域的研究进展进行了综述，指出了该领域研究中存在的主要问题，即一方面是作图个体的数量有限，另一方面是采用的标记以随机标记为主，导致了建成的图谱以及利用图谱获得的数量性状基因位点信息具有杂交组合特异性，造成了QTLs的可信度和在林木遗传改良以及标记辅助选择中的实用性降低等现象。

This paper is one of a series of reports on the genetic improvement of cotton varieties in the Yangtse valley in China since 1950s, the purpose of which is to study the genetic improvements on yield and yield components (bolls per plant, boll size and lint percentage).

本文是我国长江流域棉区棉花品种遗传改良研究的系列报道之一，目的在于探讨建国以来我国长江棉区棉花品种在产量和产量组分性状上遗传改良的成效。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。