Studies on photosynthetic characteristics of Chinese cabbage satellite monosome, diploid or trisome;2. Characteristics of Photosynthesis in Seed Plants of Satellite Chromosome Monosome, Diploid and Trisome of Chinese Cabbage

以大白菜隨體單體黄色视频大全在线、三體和二倍體為試材亚洲AAA无码视频，在自然條件下黄日韩国产在线观看，對生殖生長期的功能葉的葉綠素含量女人一级A片免费视频、希爾反應(yīng)活性a片欧美与国产一区二区、凈光合速率欧美另类偷自拍清纯唯美、光合速率日變化、Rubisco活性等生理生化指標進行了測定欧美性爱图片小说，以研究同源染色體的附加和減少對光合特性的影響欧美老屄，為開展染色體工程育種提供參考。

They are often morphologically distinct from A chromosomes, being smallerand more highly heterochromatic in most cases. B chromosomes do not pair with Achromosomes, and they are inherited in a non-Mendelian way, exhibiting meiotic andmitotic instability and nondisjunction. However, B chromosome DNA is quiteidentical to the corresponding sequence on the A chromosome complement. So far afew B chromosome specific DNA sequence have been identified. Specific DNAsequences on B chromosome have been the attractive research area on Bchromosomes.

現(xiàn)已在千余種植物和近三百種動物中被發(fā)現(xiàn)。B染色體與物種中正常染色體不同：獨立于整倍體基因組之外亚洲欧美另类视频观看，減數(shù)分裂時不與A染色體發(fā)生聯(lián)會和配對黄色网欧美日朝，細胞分裂后期不分離，非孟德爾遺傳欧美黑又硬，富含異染色質(zhì)色色色色色色论坛，不含對宿主主要性狀有影響的基因等。B染色體DNA的分子組成既與A染色體極為相似国产精品视频区一区二，具有A染色體DNA分子組成的一般特征：富含重復(fù)序列和轉(zhuǎn)座成分a片免费资源，染色體三大功能組件DNA高度同源；又與之相區(qū)別cao进入在线观看视频，含有B染色體特異的DNA序列一级婬片A片AAA毛片A，這些DNA序列可以為探討B(tài)染色體的起源和進化提供有價值的信息。

Results showed that the PMC meiosis of autotetraploid was similar to the diploid except some particularities. In metaphase Ⅰ, multivalent, quadrivalent, trivalent, bivalent and univalent were observed and some of the chromosomes were found not to rank on the metaphase plate and so did in metaphase Ⅱ cells. In anaphase Ⅰ and anaphase Ⅱ cells, there were lagging chromosomes, chromosome bridge and fragment. During anaphase Ⅱ and telophase Ⅱ, chromosome segregation was not synchronous or equal. At tetrad stage, dyad, triad, tetrad with micronucleus and polyad appeared.

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For obtaining the aneuploid in rice,the primary trisomic from triplo-1 to triplo-12 and the aneuploid derived from 1992~1995.From the offspringe of triplo-10, a primary trisomic of chromosome 10 of this variety,an isotetrasomic triplo-10-1 was obtained.

在水稻上，為了獲得這類遺傳材料加勒比无码HEZYO，從中秈3037同源三倍體后代產(chǎn)生的非整倍體中www.偷，在篩選初級三體的同時，進行了等臂染色體變異材料的篩選亚洲色图欧美日韩。

Monosomic 3, monosomic 5, monosomic 10, trisomic 4 and trisomic 5 as experiment materials, their meiosis behavior of pollen mother cell, pollen characteristics, physiological and biochemical characteristics of anther, section observation of pollen development and the structure of embryo sac were studied, and the effects on the seed set and transmission rate were analyzed.

本文以大白菜同源四倍體小孢子培養(yǎng)產(chǎn)生的且已鑒定為3號單體欧美中文自拍另类、5號單體、10號單體先锋影音网址、4號初級三體你懂的精品视频、5號初級三體的非整倍體株系及二倍體株系等為試材，對各材料的結(jié)籽率人人摸人人操人人爱人人看、雄配子傳遞率進行了統(tǒng)計，并對花粉母細胞減數(shù)分裂行為、花粉特性粉色国产毛片、花粉發(fā)育和胚囊結(jié)構(gòu)以及花藥生理生化特性等方面進行了觀察研究亚洲国产欧美日韩在线人成，進而分析了其對大白菜單體n-1雄配子和三體n+1雄配子傳遞率的影響。

In order to explain clearly the variation status of embryo from tetrapoid Robinia pseudoacacia and fully use the variation resource initiated in the sexual reproduction of TRP in the further improvement of TRP, the classification and vitalities of seed embryos from tetraploid Robinia pseudoacacia were studied. The main results are as follow. According to the cotyledon number, color and plumpness, the seed embryos of TRP could be divided into 5 types: YVT (yellow, very replete,2 cotyledons), YMT( yellow, more replete,3 cotyledons ), YRF ( yellow, replete,4 cotyledons ), GNT ( green, no-replete, 2 cotyledons ) and WNT ( white, no-replete, 2 cotyledons ).

為了闡明刺槐同源四倍體種子胚變異狀況及充分利用刺槐同源四倍體有性過程創(chuàng)造的變異資源對四倍體刺槐進行遺傳改良三级国产欧美性爱片，研究了刺槐同源四倍體種子胚類型及其生活力特征野狼福利视频，主要結(jié)論如下：刺槐同源四倍體種子胚按照子葉數(shù)量、顏色及飽滿程度亚洲欧美另类片专区，可以劃分出5個類型：黃二男女晚上看的国产在线视频、黃三、黃四自拍偷拍第、綠二及白二外国黄色视频免费观看，所有類型種子胚混合平均單胚重量接近二倍體的1/2。