六倍体

The result showed that newwheat species might be prodcued in progeny of unstable amphidiploid, which offeredsignificant pattern for evolution from octaploid wheat to hexaploid wheat and widenedthe train of thought of studying the origin of biological species.

这个结果显示，通过对双二倍体分离后代的有效选择，有可能形成一个新的小麦种，从而为从八倍体小麦向六倍体小麦演化提供了一个新的进化模式，拓宽了研究物种起源的思路。

CIMMYT synthetic hexaploid wheats were employed to cross with rye for evaluating the crossability of SHWs and screening SHWs with high crossability for distant cross. Great variation of the seed set percentage was observed among 102 SHWs ranged from 0% to 72.49%. Of 102 SHWs, 11 ones possessed the crossability higher than 50%, and one (YAR/Aegilops tauschii 518) had a similar crossability as Chinese Spring.

利用102份从CIMMYT引进的人工合成六倍体小麦与黑麦杂交，分析了人工合成六倍体小麦的可杂交性，结果表明：人工合成小麦的可杂交能力变异很大，从0%~72.49%；其中有11份人工合成小麦的可杂交率超过50%以上，1份人工合成小麦YAR/Aegilops tauschii 518的杂交结实率达到72.49%，与中国春相似。

They are complex polyploids, being partly tetraploid and partly hexaploid

它们是复杂的多倍体，其中一部分是四倍体，一部分是六倍体。

These microscopic characteristics of pollen grain and stomata could be used as the evidence to identify diaploid spieces and hexaploid, octoploid spieces whose chromosome ploidies are hugely different.

结论］用花粉粒和气孔的一些微观特征作为鉴别二倍体和六倍体、八倍体等染色体组倍数相差较大的物种有一定的依据。

Percentage of seedling in hexaploid Tritical X common wheat was more high because endosperm developed very well than that in common wheat X hexaploid Tritical because endosperm developed bad. Many seeds and good seedling were obtained by back-crossing.

2六倍体小黑麦×普通小麦与普通小麦×六倍体小黑麦两种杂交方式都有比较高的杂交结实率，但前者种子发育好，种子相对饱满，出苗率高，后者种子胚乳发育不良，出苗率低。

"Wheats are called diploids when they have seven chromosomes, tetraploids when they have fourteen , and hexaploids when they have twenty-one."

其性细胞具有7条染色体的小麦称为二倍体；具有14条染色体的称为四倍体；具有21条的称为六倍体。

In geographical distribution, the tetraploids and the hexaploids were continuous, and overlapped with C. saluenensis and C. pitardii.

四倍体与六倍体类型地理分布是连续的，并与近缘的二倍体种怒江山茶、西南山茶重叠分布。

The tetraploids of C.reticulata from the localities with the altitude of over 1800 m were gross-morphologically similar to the hexaploids, but those growing between 1100 ～1800 m were different to some extent from the hexaploids.

中海拔(1800m)以上的四倍体的云南山茶花外部形态特征与六倍体类型比较相似，而低海拔(1100～1800 m)的四倍体类型的外部形态特征则有些不同，但核形态结构是比较相似的。

Specific bands of D genomes and AB genome in four diploids, four tetraploids and four hexaploids, respectively, could be also amplified by means of M70/E5 1 and M711E5 1 primer combinations screened from twenty pairs of AFLP primer combination for test.

对二倍体、四倍体和六倍体小麦各4个材料的DNA进行AFLP扩增，从20对引物组合中筛选出M70/E51和M71/E51两个引物组合能扩增出D染色体组或AB染色体组的特异性带。

In grain-filling stage, the qP values of evolutionary wheats decreased under water stress, while Shan253 and Changwu134 hadn't decreased, indicated that the effect of water stress on the re-oxidation in Q-A of modern wheat was slight, while before this stage, the electron transport from PSⅡto QA restrained by water stress was main factor of photosynthesis non-stomata limitation to modern wheat; The qNP values of hexaploid were higher than diploid and tetraploid wheat, indicated that the ability of using light energy

随小麦由二倍体向四倍体、六倍体及现代小麦进化，表观电子传递速率有增大趋势，其受水分胁迫影响的程度在花前期有加剧趋势，花前期栽培一粒、栽培二粒、普通小麦、陕253和长武134这五种小麦在水分胁迫下表观量子产额的降幅分别为5%、7.47%、14.29%、33.3%和53.49%，光饱和Pn的降幅分别为8.8%、26.14%、23.25%、44.22%和51.29%，光饱和点整体上也是下降的，且这三个指标的降幅随进化程度提高有增大趋势，表明小麦在进化过程中能量转换系统受水分胁迫影响的程度加剧；而在水分胁迫下，小麦的羧化效率和RuBP再生速率也均下降，下降的程

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。