英语释义

• mate a hybrid of the first generation with one of its parents

片语

Backcross population回交群体

Nullisomic backcross小黑麦异代换系

backcross progeny回交子代

Inverse backcross反回交

interspecific backcross回交

backcross method回交法

incomplete backcross不完全回交

gamete backcross配子回交

double backcross双向回交

英汉例句

• the variance component of cross and backcross generations of quantitative character controlled by multigenes is studied on condition of chromosome translocation.

  研究了染色体易位情况下，多基因控制的数量性状杂交及回交世代的方差组成。

• no significant differences in studied traits was obssrved among the groups with various genes, controlling erucic acid content(eac)in the backcross generation.

  回交世代不同芥酸含量的各组在产量和大多数其他性状上没有明显差异。

• we analyzed agronomy traits and substituted segments of 5 advanced backcross substitution lines derived from a backcross of 9311 and a japonica donor, nipponbare.

  为供体的5个高代回交置换系的农艺性状及置换片段进行分析。

• the results had been showed that male sterile lines has 100 percent rate for both the sterile plant and sterile degree in the different backcross generation.

  研究结果表明，中八叶乌塌菜各回交后代不育株率和不育度均表现为100%，不育系在回交二代时外部形态接近轮回亲本。

• the recombination rate of the target traits was higher in backcross generations than in the other segregation generations.

  总粒数与其它性状相关不显着。目标性状的重组率以回交后代为高。

• the related techniques in backcross breeding were also discussed.

  对回交育种中的有关技术也进行了讨论。

• improved cms line of wu ta tsai was similar to its recurrent parent in economic traits with backcross generation, but it has severe selfed depression.

  改良不育系从外部形态上接近轮回亲本，但是随着回交世代的增加衰退现象较为严重。

• doing foreground selection of bc_1f_1 with polymorphic locus, 161 donor segment were detected, and doing background selection and backcross for plants containing donor segment.

  利用所筛选的多态性标记对bc_1f_1群体进行前景检测，检测到161个供体片段，并对含有供体片段的单株进行背景选择和回交。

• gene expression of two chinese cabbage backcross hybrid bc1, bc2 and their parents at bud stage was analyzed by means of cdna-aflp technique.

  利用cdna-aflp技术对两种材料的不同回交世代bc1、bc2代与其亲本在蕾期的基因表达进行分析。

• molecular marker-assisted selection (mas) provides a very efficient tool for backcross breeding because it can offer rapid and precise selection of the targeted gene.

  分子标记辅助选择技术以其对目标基因快速而精确的选择为回交育种提供了非常有效的工具。

• for this reason, in this type of species such as the silkworm, backcross population is generally used to map dmninant-recessive markers.

  由于这个原因，作囤这类物种的遗传连锁图谱通常是使用回交群体。

• keep the original strains going. after several generations you will need to backcross to one of the previous strains.

  必须继续保留原线鱼种，因为经过异种杂交后往往需要原线鱼种做反交。

• however, because of backcross between a and o. aurea and self-cross of b, the genetic structures of offsprings are more and more close to the maternal parent.

  随着a组合与母本的回交及b组合的自交，又使得杂交子代的遗传结构向母本靠近。

• the results were verified by backcross inheritance experiment.

  上述结果通过回交试验得到进一步验证。

• the body weights and body sizes of positive and inverse backcross progeny of charolais and nangyang yellow cattle and nangyang yellow cattle were compared.

  本研究把夏南杂交的正回交后代、反回交后代及南阳牛的体重、体尺作了比较分析。

• it was concluded that the modified backcross method would short-en the duration of breeding.

  初步认为，用修饰回交法能缩短年限；

• marker-assisted selection for protein content was conducted in backcross population in wheat.

  对小麦回交后代的蛋白质含量进行了分子标记辅助选择研究。

• there is no difference among different backcross generations.

  不同的回交世代缺绿无差异；

• pedigree method, backcross method and convergent cross selection are used widely in dwarf maize breeding.

  矮生玉米自交系的选育方法主要有系谱法、回交法和聚合选择法。

• the double low variety used backcross male parent for double high gms, the double low gms had been bred through continuous backcross, at the same time, the double low hybrid has be en bred.

  以现有的双低品种为回交父本，将双高核不育材料转育成双低核不育系，并已配制出了双低杂交种。

• backcross makes a notable impact eff ection on improving fibre yield and long fibre content.

  回交法对提高亚麻出麻率和纤维产量上效果显着。

• both the average number and length of introgressed segments decreased along with the increase of backcross generations.

  统计分析表明，平均导入片段数和平均导入片段长度均随回交世代的增加而逐渐减少。

• improved cms line of zao 49 was similar to its recurrent parent in economic traits with backcross generation, but it has severe selfed depression.

  改良不育系从外部形态上接近轮回亲本，但是随着回交世代的增加衰退现象较为严重。