系统育种

A new Antheraea pernyi variety Hulunbei'er 1 in bivoltine area in which breeding one generation for a year has been bred by the methods of pedigree separation and hybridization.

采用系统分离和杂交育种方法，育成了适合二化一放蚕区放养的柞蚕四元杂交新品种呼伦贝尔一号。

The interactive of model and benchwork facilitate understanding the sophisticated metabolism systematically and improving the metabolic features of industrialmicrobial strains and the expression of target metabol...

根据这些信息，可以设计、优化工业微生物代谢特征，高表达目标代谢物。本文综述了系统生物技术在工业微生物育种和高通量筛选中的最新应用进展。

Data management with Visual FoxPro and data computation with MicrosoftFortran were realized in Estimating BLUP's breeding value and computing inbreedingcoefficient.

在BLUP法育种值估计和计算近交系数中，系统利用Visual Foxpro进行数据准备、整理和Microsoft Fortran进行计算，并通过链接达到数据计算结果与Visual ForPro数据管理的统一。

Exotic germplasms have been playing an important role in corn breeding and production in our country. But to make good use of them, their genetic characteristics and germplasm relationship with Chinese inbred lines representing different heterotic groups should be studied.

引进国外种质对提高我国玉米育种和生产水平具有重要作用，但要充分发挥其作用，必须系统研究其种质特点及其与我国不同优势类群自交系的遗传关系。

Based on incomplete statistics, by use of germplasms from INGER nurseries, six inbred varieties and 17 rice hybrids have been developed and released in commercial production for years and brought great economic and social profits in Guangxi province.

据不完全统计，利用INGER部份优良种质，进行系统选育和杂交育种，育成通过广西农作物品种审定并推广的品种6个，杂交稻组合17个，这些品种和组合在广西水稻生产上已大面积推广，取得了巨大的社会和经济效益。

In order to use the techniques of tissue and protoplasts culture for the plant breeding, it i prerequisite to understand the morphogenic potential of different varifies in tissue culture, and set up an efficient protoplast system capable of sustained divisi〓n and plan〓 r〓generation.

为了将组织培养和原生质体培养技术用于育种目的，必须了解不同品种的红豆草在组织培养中的再生能力和建立一个高效率的原生质体培养与再生的实验系统。

The injury tolerance of cell plasma membrane and the correlative enzymes activities of plasma-membrane protection system in the Ulmus pumila leaves treated by nine concentrations (0.3%, 0.6%, 0.9%. 1.2%, 1.5%, 1.8%, 2.1%, 2.4%, 3.0%) of Na2CO3 and NaHCO3 mixtures were studied in a greenhouse of Northeast Forestry University, Harbin, China.

在东北林业大学育种基地，利用9种浓度(0.3%、06%、0.9%、1.2%、1.5%、1.8%、2.1%、2.4%、3.0%)的Na2CO3和NaHCO3混合液对白榆扦插苗进行胁迫处理，探讨其在盐胁迫下，细胞质膜的伤害程度和质膜保护系统相关酶的活性。

Moreover, because the mulberry is a cross-pollinated plant, it is hard to judge the relations among the species accurately because of the hard up for phylogenetic information in transition types formed in intra-species and inter-species hybridization, therefore, there is no satisfied classification method for Morns L..

因此，利用分子生物学技术研究桑属植物的系统与进化关系，有助于解决我国桑属植物分类中所存在的问题，对于桑树种质资源的分析、鉴定和利用、桑树的遗传育种都具有十分重要的意义。

ABSTRACT It is because that the excellent acceptors for maize transgenic engineering are insufficient in our country, especially in the southwest mountain areas of china and hereditary variation regularity for the two characters such as efficiency of embryonic callus induction and number of regenerating plant (these two characters were abbreviated to the nduction efficiency and number of regenerating in the following of the paper, respectively), which hint the maize culturing capacity, is not very clear. Therefore, aiming at picking out superior acceptors, we had made systematic researches on the two characters with combing traditional quantitative-character genetic analyzing methods such as single-factor genetic mating design, diallel crossing genetic design, genetic effect analyzing method and the modern molecular locating method such as QTLs'. The main results are followed.(1) 50 superior inbred lines and about 30 crosses in our country, especially in the southwest of China were used for identifying and selecting the superior genotypes in the above two investigated characters under the same culturing condition in 2000 and 2001. There was very significant difference among the genotypes in the both characters. But the two characters were not certainly related. Some genotypes such as 18-599 and 18-599 were very good in them. For some ones such as zong 31, induction was higher than 18-599 and 18-599 in the efficiency, but it was only 1/3 to the later in regenerating number. In some genotypes such as S37, R08, R15, P138, A318, induction efficiency was just about 3% and scarcely any regenerating plants were got. On the whole, hybrids acted better than inbreeds in the both characters.(2) Two kind of inbreeds were selected as parents of the Griffing's method 1. 18-599 and 18-599 and the inbred line zong 31 are one kind because they are not only superior in the characters of maize cross breeding, such as CA, resistance to disease and the important agricultural characters, but also excellent in transformation characters as the induction and regeneration.

针对我国、特别是西南山地所需玉米转基因工程育种优良受体极为匮乏和反应玉米幼胚培养能力的2个主要性状，即玉米幼胚胚性愈伤组织诱导率和胚性愈伤组织绿苗发生数的遗传变异规律十分不清楚的实际情况，本研究从筛选玉米转基因工程所需要的优良受体入手，采用单因素遗传交配设计、双列杂交遗传交配设计、世代基因效应等传统数量性状分析方法，以及现代分子标记定位主效QTL分析方法，对玉米幼胚胚性愈伤组织诱导率和胚性愈伤组织绿苗发生数等2个性状进行了较为系统的分析研究，取得以下主要研究结果：(1)于2000年和2001年通过对我国、特别是西南地区近50份优良自交系和近30个杂交组合，在相同培养条件下，对幼胚培养胚性愈伤组织诱导率和胚性愈伤组织绿苗发生数等2个幼胚培养能力性状进行了筛选与鉴定，发现玉米不同基因型具有完全不同的幼胚培养胚性愈伤组织诱导率和胚性愈伤组织绿苗发生数，但幼胚培养胚性愈伤组织诱导率与胚性愈伤组织绿苗发生数并不具有必然的相关关系，有的基因型，如自交系18-599和18-599在胚性愈伤组织诱导率和愈伤组织绿苗发生数等2个性状都表现相当优异；有的基因型，如自交系综31，仅幼胚培养胚性愈伤组织诱导率性状表现高于19-599和18-599，但在胚性愈伤组织绿苗发生数这一性状则与它们有相当大的差距，仅为19-599和18-599的1/3左右；有的基因型，如S37、R08、R15、P138、A318等玉米自交系不仅幼胚培养胚性愈伤组织诱导率很低，平均仅在3％左右，而且胚性愈伤组织绿苗发生数表现也很差，基本上没有分化成苗。

Based on the practice of nectarine breeding,the systematical inheritance of peel tomenta, flesh color ,pollen fertility and flavor of parents and their hybridization offsprings was analysed.

结合油桃育种实践，对亲本、杂交后代的果皮茸毛、肉色、花粉育性、果实风味等性状进行了系统遗传分析，结果进一步证实了果皮茸毛、肉色、花粉育性3个性状各由1对等位基因控制，其中果皮有茸毛对无茸毛、白肉对黄肉、花粉可育对败育均呈完全显性，且这3对等位基因分别呈独立遗传，无互作效应；选择甜风味的品种作亲本，杂交后代出现甜油桃单株的比例较高。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。