查询词典 line breeding

If each human family were dependent only on its own resources; if the children of improvident parents starved to death; if, thus, overbreeding brought its own "punishment" to the germ line--then there would be no public interest in controlling the breeding of families.

如果每个人类家庭都是依赖本身的资源；如果眼光短浅父母的子女饥饿致死；如果过度生育为生殖细胞带来自我的「惩罚」—那么管制家庭生育是不涉公共利益。

By carefully and selectively breeding and inbreeding, it was possible to create a line of dogs that bred true to form.

上校小心谨慎地饲养和繁殖他们，并逐渐形成新的一支适合饲养标准的品种。

Marker-assisted introgression is one of the major applications of molecular information in animal breeding aiming at introgression of one or more favorable genes from a line to another, while keeping the genetic background of the recipient as much as possible. It consists of three phases.

标记辅助导入是分子遗传信息应用于动物育种的一个重要方面，其目的是在标记信息的辅助下将一个品种中的一个或多个优良基因导入另一个品种，同时还要尽可能地保持受体群体原有的遗传背景。

Km. This in turn slowed shore-line erosion, improved fish-breeding habitats, and increased the egret population.

这减缓了海岸线侵蚀、改善了鱼类繁殖生存环境，并使白鹫数量再次增加。

Researchers took the lead in making studies on onion and pepper male sterile line utilization, heterosis utilization and resistance breeding in solanaceous and cruciferous vegetables, watermelon and melon.

并在国内率先开展了洋葱、辣椒不育系利用，茄果类、十字花科蔬菜及西甜瓜杂种优势利用及抗病育种研究，1982年至今育成并通过审定的蔬菜新品种75个。

In order to determine the genetic differences between high molecular weigh glutenin subunits 17+18 and 7+8, HMW-GS 17+18 was introduced into Longmai 20 by 6 consecutive backcrosses with biochemical marker assisted selection. The near isogenic lines of HMW-GS 17+18 and 7+8 were obtained and grown in the experimental field of Crop Breeding Institute of Heilongjiang Academy of Agricultural Sciences in 2006. The field experiments were designed using the method of two line-contrast arrangement with four replicates.

为了解小麦Glu-B1位点HMW-GS 17+18与7+8的遗传差异，利用生化标记和连续6次选择性回交的方法将17+18亚基转移到黑龙江省小麦品种龙麦20中，获得了龙麦20的Glu-B1位点HMW-GS17+18与7+8的近等基因系。2006年将NILs种植在黑龙江省农业科学院育种研究所的试验田，田间设计采用双列对比排列，4次重复。

If you insist on feeding these, I recommend breeding guppies or something along that line.

如果你一定要坚持投喂活饵，我倒是建议你喂一些古比鱼之类的东西。

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。

Four resistance genes, Xa4, xa5, xa13 and Xa21 in the near-isogenic line IRBB60 from IRRI were pyramided into breeding lines in South China using PCR-based marker-assisted selection.

本研究以携带Xa4、xa5、xa13、Xa21 4个抗白叶枯病基因的IRBB60与8个水稻新品系，组配8个杂交组合。

The traditional line selection and cross breeding is one of the most effective ways to cultivate improved varieties.

传统的家系选择和杂交育种是培育优良品种最有效的方法之一。

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。