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- Back cross breeding techniques by Taigu genic male sterile wheat 利用太谷核不育小麦进行小麦回交育种技术简介
- back cross breeding 回交育种
- When it comes to cross breeding for better strains,Li is the comrade you should consult. 至于杂交培育良种的问题，你可以去请教李同志。
- Preliminary Study on Cross Breeding Technological System of Rose in Beijing Forestry University. 北林月季杂交育种技术体系初探。
- Research on Cross Breeding and Space Mutation of Dioscorea Zingiberensis C.H. Wright. 盾叶薯蓣（Dioscorea zingiberensis C.;H
- Research progress on cross breeding of Chinese fir was summarized in this paper and the primary insufficiency was analyzed. 摘要概述了我国杉木杂交育种研究进展，分析了杉木杂交育种存在的主要问题及其对策。
- A method that combines irradiation and cross breeding has been put forword to use early-maturing rice restorer to get hybrid combination with right maturing date. 我们还提出用辐射与杂交相结合的方法，解决早熟恢复系杂交稻熟期配套问题的具体方案。
- Omit condition of zoology, economy according to Qinghai, thoroughbred breed system includes blooded breed system, cross breed system 2 respects. 根据青海省生态、经济条件 ,良种繁育体系包括纯种繁育体系、杂交繁育体系 2个方面。
- Variation patterns and rule of morphology variation in Lilium regale Wilson was revealed to provide theoretical basis for introduction and domestication, and cross breeding. 摘要揭示岷江百合的形态变异式样及变异规律，为引种驯化、杂交育种提供依据。
- Gene effects and effective gene number on litter size in pig are estimated from the mean and the mean variances of 6 generations including Taihu Pig(P1),Landrace (P2),first cross(F1),second cross(F2),third cross(F3)and back cross(B2). 利用太湖猪（P1）、长白猪（P2）、杂交一代（F1）、杂交二代（F2）、杂交三代（F3）； 和回交一代（B2）等6个世代产仔数的材料，分析了猪产仔性状的基因效应和基因数。
- The effects of fermenting accessory ingredients on the alcohol fermentation of wild grape wine was studied with cross breed of"Gongniang Erhao"as raw materials. 以山葡萄种间杂交种“公酿二号”为原料,研究发酵助剂对山葡萄酒精发酵的影响。
- In order to analysis the genetic characteristic of male sterility, test cross, sister cross, back cross, reciprocal cross and self-pollination were conducted with these male sterule plants. 通过正交和反交对不育株的所属类型进行分析，结合自交、回交分析其遗传特点。
- The flower succession of cultivated Paeonia lacriflora had close relationships with the stamen and pistil succession, which is the fundamental for parental selection in cross breeding. 摘要芍药花器官在人工栽培选择条件下的花型演化类型与雌雄蕊的演变关系密切，是杂交育种亲本类型选择的重要依据。
- Experience in cross breeding between Triticum aestivum and Agropyron glaucum was summari-zed as follows:1.Breeding of new varieties from Agrotriticum hybrids:(1)Single cross. (2)Composite cross. 作者从事小偃麦远缘杂交育种工作20余年,已育成7个小偃麦品种及广西260、261等新品系,5个稳定的中间类型(新种)及广西631、632等新八倍体种和新的附加系,它们都是小麦育种的优良桥梁亲本。
- Rose bushes shoot again after being cut back. 玫瑰丛修剪後还能再长出新枝。
- In this paper, the achievements, the chief utilization way, the difficulties and its solution way, and the future research prospects in the interspecific cross breeding were summarized. 本文综述了野生稻资源在种间杂交育种上的成就、野生稻利用的主要途径、稻种间杂交的困难、解决方法及今后的研究展望。
- A near isogenic line strain(NILs)was selected by repeated back crossing.Two NILs of dimehypo-resistance(Rd)and cartap-resistance(Rp)were selected by 12 generations back crossing. 通过12代回交，建立了抗杀虫双和抗杀螟丹近等基因系，并对其多功能氧化酶环氧化活性和生物学特性进行了比较研究。
- Abstract : After the measures of natural selection and cross breeding, induced mutation breeding by radiation has also become an effective method for creating new fruit tree germplasms. 摘要 ： 继实生选种和杂交育种后，辐射诱变育种也成为创造果树新种质的一个有效途径。
- Back Cross in Fallaway position leading to Wing 并退步位置的后退交叉进入翼步
- He trudge three hour in the snow to get back home. 他在雪中跋涉三个钟点才回到家。
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries
