查询词典 chromosome number

The results showed that the number of chromosome, which was from the cultured seedlings of meristem tip and the rank seedlings of meristem tip, was not altered, both the number were 2n=16,the hereditary stability of callus and regeneration plant was poor; and the variation percentage of chromosome in callus was 43.4%, among which haploid accounted for 6.7%, triploid accounted for 2.5%,tetraploid accounted for 10%,pentaploid accounted for 4.2%,hexaploid accounted for 3.3%,septuploid accounted for 4.2%,octoploid accounted for 3.3%,dysploid accounted for 9.2%;the chromosome variation percentage of differentiation seedlings derived from callus was11.7%,among which haploid was 6.7%,triploid accounted for 1.7%,tetraploid was 3.3%.

结果表明，茎尖分生组织培养的幼苗及丛生苗遗传稳定，其染色体未发生倍性变异，均为2n=16；愈伤组织及其再生苗遗传稳定性较差，愈伤组织染色体数变异率为43.4%，其中单倍体占6.7%、三倍体占2.5%、四倍体占10%、五倍体占4.2%、六倍体占3.3%、七倍体占4.2%、八倍体占3.3%、非整倍体占9.2%；愈伤组织分化苗染色体变异率为11.7%，其中单倍体占6.7%，三倍体占1.7%，四倍体占3.3%。

The number of the chromosomes in Henan large tail sheep is 2n=54, the karyotypes of male and female sheep are 54, XY and 54, XX, respectively. There are 26 pairs of autosomes and 1 pair of sex-chromosome. Among 26 pairs of autosomes, 3 pairs are metacentric chromosomes, 23 pairs are telocentric chromosomes. X chromosome is the biggest subtelocentric chromosome and Y chromosome is the smallest submetacentric chromosome.

河南大尾寒羊二倍体染色体数目为2n=54，公羊核型54，XY；母羊核型54，XX.27对染色体中包括26对常染色体和1对性染色体，常染色体中有3对为中着丝粒染色体，23对为端着丝粒染色体；性染色体中，X染色体为最大的端着丝粒染色体，Y染色体为最小的中着丝粒染色体。

The karyotype of the genus Lycoris has great variation,we find some new karyotypes and new chromosome number by meticulous cytological analysis, especially in Lycoris radiata which karyotypes exist tremendous variation even in different population.

石蒜属植物的染色体核型变异很大，通过细致的核型分析，发现了许多新的核型和染色体数目；其中石蒜在不同居群中的核型存在巨大的变异。

Not all polyploids are reproductively isolated from their parental plants, so an increase in chromosome number may not result in the complete cessation of gene flow between the incipient polyploids and their parental diploids.

并非所有的多倍体与其亲本有生殖隔离，因此，染色体数目增加不会导致初始多倍体与其二倍体亲本之间的基因交流完全停止。

A total of 442 BC〓F〓 and 9 BC〓F〓 plants were obtained by backcrossing F〓 and BC〓F〓 to 02428, the chromosome number of 42 BC〓F〓 and all BC〓F〓 plants so far examined varied from 24 to 38, from which 21 plants with 2n=25 and 21 diploid plants were isolated.

进一步用02428对F2和BC1 F1回交共获得442株BC1F2和9株BC2F1，已确定其中42株BC1F1及所有BC2F1植株的体细胞染色体数目，其变幅为24-38，2n=25及2n=24的植株各有21个。

Its chromosome number was 42, and 21 bivalents could be observed at PMC MI. FISH analysis by using genomic DNAs from S. cereale and genomic DNAs from L.

染色体观察结果表明，山农030-1根尖染色体数目为42，花粉母细胞减数分裂中期I染色体构型为2n=21Ⅱ。

Alterations of chromosome number hae been obsered in the somatic tissue of Crassostrea gigas diploids and artificial polyploids.

染色体数目的改变在二倍体及人工诱导多倍体太平洋牡蛎的组织中已经发现。

This small tribe is allied to Poeae , but differs in the closed, tubular leaf sheaths, small, fleshy lodicules, and chromosome number.

这小的族与Poeae有联系，但是在被关闭，管状的叶鞘，小，肉质的鳞被和染色体数目方面不同。

Hytivus. Although chromosome number of all materials studied was counted to be 2n = 38, the difference in meiotic behaviors between individuals of first selfed progenies were observed, which indicated the difference in the degree of diploidization.

虽然染色体记数的结果表明所有单株的染色体数目都为38条，但是花粉母细胞的减数分裂行为在单株间的细小差异也被观察到了，这表明各单株间存在较小的二倍化程度的差异。

The seed set frequencies ranged from 0.001% to 0.184%.The chromosome number of F2 plant root tip varied from 39 to 56.4 In the Fa progeny of wheat *AR7l, Some plants showed higher alien translocation frenquencies.

在小麦与黑麦AR71属间杂种的F_2中，个别植株发生了较高的异源易位频率，其中有1株(229-3植株)产生了多达3个异源易位。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。