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   chromosome inversion 在 农作物 分类中 的翻译结果: 查询用时:0.458秒
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chromosome inversion
相关语句
  染色体倒位
    The chromosome inversion frequency was higher in Liaoning,Heilongjiang,Zhejiang,Jiangsu and Henan provinces.
    染色体倒位频率则以辽宁、黑龙江、浙江、江苏、湖南为高。
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  chromosome inversion
Pericentric chromosome inversion 9phqh was not characteristic of patients with autism, while variation in heterochromatin regions 1phqh, 9qh+, and 16qh-were found significantly more frequently in children with autism.
      
Linkage with a chromosome inversion was excluded by cytological analysis.
      
Chromosome Inversion Polymorphisms Influence Morphological Traits in Trimerotropis Pallidipennis (Orthoptera)
      
The second chromosome inversion In (2L+2R) Cy in a heterozygous condition was studied for its effect on frequency and interference of crossing over in three different regions of the X chromosome of Drosophila melanogaster.
      
Chromosome inversion polymorphism in natural populations of Drosophila punjabiensis Parshad and Paika
      
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The chromosome structure aberration of soybean was indirectly identified by checking the percentage of serile pollen grains in F 1 plants from crosses between 411 accessions of soybean collected from various regions in China and cultivated soybeans with normal chromosome. The results showed that the frequencies of chromosome translocation,inversion and the normal chromosome of wild soybean (including semi-wild soybean) were 73.3%,7.4% and 19.3% respectively. The frequencies of chromosome translocation, inversion...

The chromosome structure aberration of soybean was indirectly identified by checking the percentage of serile pollen grains in F 1 plants from crosses between 411 accessions of soybean collected from various regions in China and cultivated soybeans with normal chromosome. The results showed that the frequencies of chromosome translocation,inversion and the normal chromosome of wild soybean (including semi-wild soybean) were 73.3%,7.4% and 19.3% respectively. The frequencies of chromosome translocation, inversion and the normal chromosome of cultivated soybean (including semi-cultivated soybean) were 4.7% (all are semi-cultivated),1.7% and 93.6% respectively. The chromosome stucture aberration frequencies of different evolutionary level soybean was different. As the evolution level of the tested accessions was increased the frequency of translocation decreased. In general, the chromosome translocation frequency of wild soybean in China was high and the highest ones appeared in Hebei and Henan provinces. The frequencies were also higher in Nei Menggu and Jilin provinces. The lower frequency was located in coastal regions, including Jiangsu and Zhejiang provinces. The chromosome inversion frequency was higher in Liaoning,Heilongjiang,Zhejiang,Jiangsu and Henan provinces.

本研究利用不同地理来源的大豆411份与已知的具正常染色体的栽培大豆杂交,通过对F1育性观察,间接判断大豆染色体结构变异情况。研究结果表明,中国野生大豆(野生大豆、半野生大豆)染色体易位频率为73.3%,染色体倒位频率为7.4%,染色体正常的野生大豆占19.3%。栽培大豆(半栽培大豆、栽培大豆)染色体易位频率为4.7%(全部为半栽培大豆),倒位频率为1.7%,染色体正常的频率为93.6%。说明不同进化程度的大豆染色体结构变异频率有所不同。随着进化程度的提高,染色体易位频率随之下降,栽培大豆仅存在极少的染色体倒位。中国各省份的野生大豆染色体易位频率普遍比较高,以河南、河北二省为最高,内蒙、吉林次之,而沿海地区染色体易位的频率相对较低。染色体倒位频率则以辽宁、黑龙江、浙江、江苏、湖南为高。

Interspescific hybridization among four cultivated species in Gossypium (G.herbaceum,G.arboreum,G.hirsutum and G.barbadense) were carried out to produce dispecific hybrids F1,(G.arboreum×G.herbaceum)F1 and (G.hirsutum×G.barbadense)F1,and quadrispecific hybrid F1,which was produced by crossed the chromosome doubled (G.arboreum×G.herbaceum)F1 with (G.hirsutum×G.barbadense)F1.In order to study the evolution relationship among the four cultivated species in Gossypium,the characteristic of chromosome behavior...

Interspescific hybridization among four cultivated species in Gossypium (G.herbaceum,G.arboreum,G.hirsutum and G.barbadense) were carried out to produce dispecific hybrids F1,(G.arboreum×G.herbaceum)F1 and (G.hirsutum×G.barbadense)F1,and quadrispecific hybrid F1,which was produced by crossed the chromosome doubled (G.arboreum×G.herbaceum)F1 with (G.hirsutum×G.barbadense)F1.In order to study the evolution relationship among the four cultivated species in Gossypium,the characteristic of chromosome behavior during the meiosis and pollen viability in those interspecific hybrids F1 were studied in this paper.The results showed that the diploid interspecific hybrid,(G.arboreum×G.herbaceum) F1,had a four-chromosome-ring,the chromosome configuration was 2n=26=11Ⅱ+1Ⅳ.And the normal pollen percent was 50.71%,which showed the character of typical gamete semi-sterility,and approved that there was a chromosome translocation between the two diploid cotton species,G.arboreum and G.herbaceum.For the allotetraploid species interspecific hybrid F1,(G.hirsutum×G.barbadense) F1,most of the chromosomes at metaphase Ⅰ could be paired into bivalents,with a few number of univalents,trivalents,and quardrivalents.The chromosome configuration was 2n=52=0.78Ⅰ+22.24Ⅱ+0.94Ⅲ+0.98Ⅳ,with a normal pollen rate of 54.84%.The experiment showed that there were a few chromosome translocation or chromosome inversion between the two allotetraploid cotton species,G.hirsutum and G.barbadenses.The meiosis of the quardrispecific hybrid F1 was abnormal,and the loss of chromosomes was common.Most of the chromosomes could not synapse at metaphase I,which led to many univalents and some multivalents.The chromosome configuration of the quardrispecific hybrid F1 was 2n=52=5.45Ⅰ+14.41Ⅱ+2.44Ⅲ+1.59Ⅳ+0.63Ⅴ+0.15Ⅵ,and the normal pollen rate was 6.87%,which showed that the relationship of four cultivated cotton species was relatively closed.It is possible to produce a new germplasm with the good characters of the four cultivated species through genetic recombination.

以棉属四个栽培棉种进行种间杂交,产生(亚洲棉×草棉)和(陆地棉×海岛棉)2个二元杂种F1及其[(亚洲棉×草棉)×(陆地棉×海岛棉)]四元杂种F1,观察和测定4个栽培棉种及其2个二元杂种F1和四元杂种F1的花粉母细胞(PMC)减数分裂的染色体行为及其花粉生活力,以研究4个栽培棉种间的亲缘关系和进化关系。结果表明,二元杂种(亚洲棉×草棉)F1的PMC减数分裂中期Ⅰ出现一个四体环,其余为二价体,染色体构型为2n=26=11Ⅱ+1Ⅳ;花粉生活力的测定表明,(亚洲棉×草棉)F1可育型花粉为50.71%,表现为典型的配子半不育特性,说明两个二倍体棉种间发生一次染色体易位。(陆地棉×海岛棉)F1以26个二价体细胞为主,但有少量的单价体、三价体以及四价体,染色体构型为2n=52=0.78Ⅰ+22.24Ⅱ+0.94Ⅲ+0.98Ⅳ。花粉生活力的测定表明,(陆地棉×海岛棉)F1可育型花粉为54.84%,可见2个四倍体棉种间亲缘关系较近,二者之间仅发生了染色体的易位或倒位。而由4个栽培种合成的四元杂种F1,其减数分裂异常,染色体丢失现象普遍,部分染色体不能联会配对,以单价体的形式存在,并出现三价体、四价体、五价体等多价体,染色体构型...

以棉属四个栽培棉种进行种间杂交,产生(亚洲棉×草棉)和(陆地棉×海岛棉)2个二元杂种F1及其[(亚洲棉×草棉)×(陆地棉×海岛棉)]四元杂种F1,观察和测定4个栽培棉种及其2个二元杂种F1和四元杂种F1的花粉母细胞(PMC)减数分裂的染色体行为及其花粉生活力,以研究4个栽培棉种间的亲缘关系和进化关系。结果表明,二元杂种(亚洲棉×草棉)F1的PMC减数分裂中期Ⅰ出现一个四体环,其余为二价体,染色体构型为2n=26=11Ⅱ+1Ⅳ;花粉生活力的测定表明,(亚洲棉×草棉)F1可育型花粉为50.71%,表现为典型的配子半不育特性,说明两个二倍体棉种间发生一次染色体易位。(陆地棉×海岛棉)F1以26个二价体细胞为主,但有少量的单价体、三价体以及四价体,染色体构型为2n=52=0.78Ⅰ+22.24Ⅱ+0.94Ⅲ+0.98Ⅳ。花粉生活力的测定表明,(陆地棉×海岛棉)F1可育型花粉为54.84%,可见2个四倍体棉种间亲缘关系较近,二者之间仅发生了染色体的易位或倒位。而由4个栽培种合成的四元杂种F1,其减数分裂异常,染色体丢失现象普遍,部分染色体不能联会配对,以单价体的形式存在,并出现三价体、四价体、五价体等多价体,染色体构型为2n=52=5.45Ⅰ+14.41Ⅱ+2.44Ⅲ+1.59Ⅳ+0.63Ⅴ+0.15Ⅵ,其可育花粉为6.87%。研究结果表明了4种栽培棉种之间的亲缘关系相对较近,可以通过遗传重组产生综合有4个栽培棉种性状的新种质。

 
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