In the self-bred progenies of autopolyploid,we found that a very few chimaeraexist in the cells of root tips,but most of them had no change in ploidy. We also found13 diploid plants in the experimental plot (ratio is 0.46%) and can be divided into 4categories.

在部分同源多倍體株系的自交結(jié)實(shí)后代中人人操性视，隨機(jī)取樣進(jìn)行根尖染色體檢查色又色综合，結(jié)果表明多倍株系體的自交結(jié)實(shí)后代倍性沒(méi)有變化人人操人人摸人人偷，但發(fā)現(xiàn)有個(gè)別細(xì)胞為不同倍性的嵌合體日本熟妇乱人伦A片高清；田間觀察到分離出來(lái)的極少數(shù)正常二倍體A片ⅩXXXX，占0.46％亚洲欧美中文精品，按照形態(tài)特征可以分成四個(gè)不同的類(lèi)型涩涩网页。

So, the abnormality of embryo sac was one of the factors that induce low seed setting percentage in autotetraploid rice.

從對(duì)13個(gè)品種的成熟胚囊育性調(diào)查的結(jié)果來(lái)看，同源四倍體水稻胚囊育性是影響其結(jié)實(shí)率的原因之一。

Study on the pollen fertility and the process of pollen formation and development in autotetraploid rice showed that the pollen fertility was high (78.33%), though many abnormities appeared in this process.

通過(guò)對(duì)5個(gè)品種的同源四倍體水稻花粉發(fā)育過(guò)程和13 個(gè)品種的花粉育性調(diào)查結(jié)果表明啊啊啊好大爽被插乱伦视频，同源四倍體花粉平均育性為78.33%欧美性爱性交一区，明顯比二倍體（91.85%）低。

In conclusion, abnormal meiosis of PM-Cs is the cytogenetic causes for fertility reduction of tetraploid melon.

花粉母細(xì)胞減數(shù)分裂的異常是同源四倍體甜瓜育性低的細(xì)胞學(xué)原因黄色自拍偷拍网址。

This may be due to the characteristics of soybean genome,an ancient tetraploid.

這些基因位于10條不同染色體上，F(xiàn)T類(lèi)基因具有成對(duì)排列于同一條染色體的短的區(qū)段的傾向免费AA午夜精品，TFL1和CEN的4個(gè)不同拷貝均位于不同的染色體上免费美女网站国产。7對(duì)基因之間同源性高于90%，而且多位于不同染色體上晚上福利视频，可能與大豆古四倍體的特性有關(guān)人人看人人摸人人操人人看。4。

The phylogenetic analysis based on the sequences in this region indicated that the y-type HMW glutenin subunits of Agropyron elongatum species were different from other subunits, whereas the x-type subunits of them were most closely related to that from the B genome.

推測(cè)四倍體長(zhǎng)穗偃麥草中的E1基因組可能起源于二倍體的E基因組国产A片综合。與來(lái)自小麥族的A最新2020中文字幕永久人人视频、B、D和G基因組部分亞基基因的啟動(dòng)子序列比較表明搞黄刺激网站，小麥族的這一區(qū)域在進(jìn)化上是相當(dāng)保守的亚洲不卡AV不卡一区二区岛国，不同基因組來(lái)源的序列同源性都在90%以上。

However, analysis of DNA methylation level indicated that the total DNA methylation levels were not significantly different between diploid and autotetraploid. Autotriploid showed a trend of low DNA methylation level. It implied that the alterations of DNA methylation levels were not linear with the autopolyploidy level in watermelon.

有趣地是激情图片久久久，二倍體與四倍體西瓜相比DNA甲基化水準(zhǔn)卻未發(fā)生大規(guī)模的調(diào)整大学生美女一级片，而三倍體西瓜顯示出較為明顯的低DNA甲基化水準(zhǔn)趨勢(shì)，表明西瓜同源多倍化過(guò)程中其基因組DNA甲基化水準(zhǔn)變化與其倍性不成線性關(guān)系蜜桃无码成人影片在线播放。

Thus, the meiotic chromosome cofigurations showed that the tetraploids and hexaploids in C.reticulata allopolyploids, and the appearance of a few tetravalents in some populations might indicatehomology of chromosomes in different genomes to some extent.

根據(jù)減數(shù)分裂的構(gòu)型电影一级毛片，我們認(rèn)為，四倍體和六倍體分別為異源四倍體和異源六倍體真人a一级性交，少數(shù)四價(jià)體的存在表明染色體有部分同源性色中色com。

Most primers amplified same bands in diploids, tetraploids and hexaploids. It suggest that D and AB genomes have high homology and D genomes be successfully transferred from diploid to hexaploid.

從供試的絕大多數(shù)引物均能在不同倍性小麥中擴(kuò)增出相同的條帶證明了D染色體組和AB染色體組間存在著很高的同源性以及利用二倍體和四倍體小麥雜交人工合成六倍體小麥的真實(shí)性。