查询词典 backcrossed

Then by the tracking investigation of the herbicide resistance of generations crossed or backcrossed with Bar gene transgenic wheat and the wheat hybrid descents heredity performance were studied. The result indicated that: 1 Development of regeneration systemsWheat genotypes and medium are the key factores influencing the development of regeneration systems for immature embryo cultivation.

此外通过回交将抗Basta除草剂的Bar基因转育到这些小麦品种，通过对转Bar基因小麦人工杂交与回交后代除草剂抗性的连续跟踪鉴定，研究了Bar基因在小麦杂种后代的遗传表现。

The F〓 generations self-pollinated to produce F〓 populations and backcrossed with susceptible parents to produce BC〓F〓 populations.

南方锈病高抗自交系齐319分别与高感自交系鲁原92、黄早4、478、340、9801杂交，F〓自交及与感病亲本回交。

To determine the inheritance of resistance in Chuanmai 42, it was crossed and backcrossed with the susceptible Sichuan varieties of common wheat Mianyang 26 (MY26) and Mianyang 335 (MY335) for preparing the F2 and BC1 populations. A total of 208 and 337 F2 plants of Chuanmai 42×MY26,Chuanmai 42×MY335, and 171 and 216 BC1 plants of Chuanmai 42/MY26//MY26,Chuanmai 42/MY335//MY335, respectively, were used for resistance analyses.

为明确川麦42抗条锈性遗传基础，将川麦42分别与高感条锈小麦品种绵阳26、绵阳335杂交和回交，获得杂交F1、F2、BC1群体，其中，川麦42×绵阳26、川麦42×绵阳335 F2群体分别为208和337株，川麦42/绵阳26//绵阳26、川麦42/绵阳335//绵阳335 BC1群体分别为171和216株用于抗性遗传分析。

Using plant AT-1found by kenaf breeding research group of institute of bast fiber crops Chinese academy of agricultural sciences in Sanya of Hainan province were used as female parent in crossing with 15-4, 04K1 and then backcrossed four times with male parent in order to select two high sterile male sterility.

利用中国农业科学院麻类研究所红麻育种课题组在海南三亚发现的红麻不育株AT-1做母本分别与15-4，04K1做杂交，再用父本回交4次，选育出2个高度不育的不育系。

Bainong 64',a resistant wheat variety to slow powdery mildew,'Jingshuang 16',a susceptible wheat variety to slow powdery mildew were crossed with each other and backcrossed with their F_1,and thus six generations including the parents were obtained.

慢白粉品种'百农64'与感病品种'京双16'杂交，F1自交并分别与两亲本回交，获得包括亲本在内的6个世代，分析了'百农64'慢白粉性的基因数目、遗传力和遗传模型。

Firstly, cross donor and recipient lines to produce F1; secondly, repeated backcross the F1 individuals and the subsequent progenies with the recipient to recover its genetic background; and thirdly, intercross the backcrossed progenies to fix the introgressed genes in the population.

在标记辅助导入过程中，标记信息既可用于辅助前景选择，即对目标基因携带者的选择，以保证目标基因的正确导入，也可用于辅助背景选择，即对受体基因组的选择，以加快受体遗传背景的恢复。

Six inbred lines of sweet corn with great genetic diversity were used as parents to make complete diallel crossing using Griffing method I . Some combinations were backcrossed and selfcrossed.

选用遗传差异较大的加强型甜玉米自交系6份做杂交亲本，按Griffing方法I遗传交配设计配制组合，并对部分杂交组合做自交和回交试验，研究甜玉米含糖量性状的遗传。

In this study we mapped a grain length controlling gene named Lk-4 with SSR and CAPs markers by screening 800 recessive plants in a BC2F2 population derived from a cross of Shuhui527×Xiaoli and backcrossed with Xiaoli as the donor parent.

对F2和BC2F2 群体籽粒大小形状和千粒重的遗传分析表明，回交能将大部分对目的基因效应具有干扰修饰作用的微效基因多态性除去，从而有利于对目的基因型的准确鉴定；在F2和BC2F2群体中只发现两类籽粒长短表现型，即短粒和长粒，并且二者分离比例符合3：1的典型一对等位基因分离比例。

In order to study transmission of 6VS/6AL chromosome through gametes and its genetic stability in different genetic background, the 6VS/6AL translocation line 92R137 (highly resistant to powdery mildew) were respectively crossed to common wheat varieties Bainong 64, Bainong 9310, Han 5310, Xiaoyan 54, Huaimai 20 and Xumai 856 introduced from different areas of China and the hybrids F1 were backcrossed as male and female.

为研究小麦－簇毛麦6VS/6AL易位染色体在不同小麦背景中的遗传稳定性及其在配子中的传递，利用高抗白粉病的普通小麦－簇毛麦6VS/6AL易位系92R137与不抗白粉病的栽培品种百农64、百农9310、邯5310、小偃54、淮麦20、徐麦856进行杂交，并用这些品种分别与杂种Fl进行正反回交。

However, the use of Aegliops tauschii in improvement of wheat yield trait has not been reported. In this study, T.durum-Ae.Squarrosa amphidiploids was crossed with common wheat PH85-16, then backcrossed with PH85-16. The variation characteristic of the main yield traits of BC1F1 and BC1F2 were analyzed. Then, QTLs affecting yield traits were detected by 130 SSR primer pairs of D genome in BC_1F_1 and BC_1F_2.The result showed chromosomes in D genome from Aegliops tauschii affected yield trait of wheat significantly.

本研究以二倍体小麦粗山羊草与四倍体硬粒小麦合成的双二倍体Am6为亲本，与普通小麦PH85-16 进行杂交，再用PH85-16 进行回交，对获得的回交后代进行了主要产量性状调查，利用位于小麦D 基组的SSR 分子标记进行了分子标记分析，对来自粗山羊草与产量性状相关的数量性状位点进行定位，探讨粗山羊草对小麦产量性状的影响。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。