品种

The average interspecific divergence was 3.860%, and special sites were found in each chicken breed which was the bases to identifying chicken breeds. The DNA taxonomy of Bar1 used NJ was consistent with morphological taxonomy among the six indigenous chicken breeds. However, the analysis of Bar2 sequences of COⅠindicated that they were lower polymorphism and no special site in most chicken breeds which was not benefit to identify chicken breeds. The DNA taxonomy of Bar2 used NJ was not consistent with morphological taxonomy among the six indigenous chicken breeds.

本研究选择的2段序列中，以Bar1序列648bp（712位点到1359位点）多态性最高，突变位点最多，为24个，品种间平均多态性为3.860%，6个鸡种在此序列中有各自不同的特异位点，NJ聚类分析6个品种基本被聚为不同的类别，与形态学分类基本一致，该COⅠ基因的Bar1序列用于这些品种鉴定是可行的；而Bar2序列进行序列多态性分析，由于其多态性低，大多品种没有其特异位点，NJ聚类分析6个品种基本被聚为不同的类别，与形态学分类基本一致，不利于品种鉴定。

Result showed that the 24 cultivars could be classified into 5 groups. The first group included 14 cultivars: Rosa "Belami"s"、Rosa "First White"、Rosa "Jubilation"、Rosa "Shuo"、Rosa "Cara Mia"、Rosa "Minor"、Rosa "Sonia Meilland"、Rosa "Grandy Masterpiece"、Rosa "Charles Mallerin"、Rosa "Cherry Brandy"、Rosa "Hiogi"、Rosa "Acrobatics"、Rosa "Lady Meillandina" and Rosa "Kardinal". The second group included 4 cultivars: Rosa "Xanadu"、Rosa "Flower Fair"、Rosa "Reading Desk"、and Rosa "West". The third group included 2 cultivars: Rosa "Red hat" and Rosa "Sohloss Manhieim". The forth group included 2 cultivars: Rosa "Purple Time" and Rosa "Sunny Girl". The fifth group included 2 cultivars: Rosa "Kent" and Rosa "Red Meidiland.

然后以主成分分析和R型聚类分析以后筛选出的主要性状为指标进行了Q型聚类分析，结果显示，24个品种可以分为五大类型：第一类型包括第一白、红衣主教、贝拉米、卡拉米亚、朱王、索尼亚、大杰作、黑王、黑旋风、樱桃白兰地、米衣、米兰夫人、绯扇、杂技表演14个品种；第二类型包括花仙、西方大地、读书台和华夏4个品种；第三类型包括曼海姆和红帽子2个品种；第四类型包括紫色时代和太阳姑娘2个品种；第五类型包括肯特和红梅郎2个品种。

Among them, 16 cultivars were moderately or higher resistant to potato late blight, 28 cultivars were moderately or higher resistant to potato late blight, 28 cultivars were moderately susceptible or less than that, and 4 cultivars had different resistant due to different altitude, accounting for 33.3%, 58.34%,and 8.33% among tested cultivars, respectively.

抗性表现为中抗以上的品种有16个，占总参试品种的33.33%，中感以下的品种有28个，占总参试品种的58.34%；其中有4个品种的抗性表现因海拔高度的不同而表现出差异，占总参试品种的8.33%。

Positive significant correlation between three infection indexes and SDD, and negative insignificant correlation between infection indexes and LIP were found. Fifteen sugarcane varieties could be divided into 6 groups on the basis of the distance more than 1.0. It resulted most ot tested sugarcane varieties had similar smut resistance. It suggested that smut race 1 and race 2 were included in inocula and the condition for Ustilago scitaminea infection was suitable in the crop season by setting up the standard varieties of NCo310, F134, NCo376 and Ya71-374 for smut identification. In addition, the results of sugarcane varieties resistant to smut race 1 and race2 were known by only a simple field trial.

结果显示：9个引进甘蔗品种中，ROC26属于感病品种，其余属于抗病或高抗品种；3个病情指数和持续发病期的两两相关均为显著正相关，潜伏侵染期与这些参数的相关为负相关，但未达到显著水平；在类间距离大于1.0的条件下，可将15个品种聚为6类，进一步明确了各品种抗黑穗病性的相似程度；抗性鉴定标准对照种NCo310、F134、NCo376和Ya71-374的应用，明确了接种源为小种1和小种2，通过一次接种试验，明确了供试品种对2个小种的抗性水平，标准对照种的抗性表现，还说明了本生长季发病条件基本是适宜的。

Healthy spikes of high-resistant varieties had thicker cell wall and tissue of cortical sclerenchyma, more number of cortical sclerenchyma layers, more number of fibrovascular bundles, smaller area of green subcutaneous tissue in rachis, and theses differences, except number of fibrovascular bundles, enlarged over time. Considering inoculated spikes, cell wall and tissue layers of cortical sclerenchyma displayed different, and to how much extent the relationship between this difference and anti-extension ability of variety had not determined. 6. On the analysis of agronomical characters and molecular marking technology, more than 30 alien anti-Gibberella wheat materials and two mutants coming from this experiment were evaluated their hereditary multiplicity.

实验结果还证明，高抗品种和感病品种的穗轴组织结构确实存在一定差异，在健康穗中，主要表现在高抗品种的皮层厚壁细胞壁和皮层厚壁组织较厚，皮层厚壁细胞层数较多，维管束数目较多，穗轴表皮下绿色组织面积较小，抗、感品种间的差异达显著水平，随发育时间延长，高抗品种的皮层厚壁细胞壁厚度、厚壁组织厚度和厚壁细胞层数增加的幅度较大；在病穗中，主要表现在高抗品种的皮层厚壁组织细胞层数和厚壁细胞壁厚度增加的幅度较大。

The results show that : pig species include Large White, Landrace, Duroc pigs and swine; cattle varieties of Simmental, Shorthorn and Brahman cattle, of Jersey cattle; sheep varieties Boer goats; duck, duck varieties, Cherry Valley Duck, Shaoxing Duck; Chicken varieties are emerging sanhuang, Guangxi top soil chicken, Ma top emerging chicken, black plume bamboo silk chickens and other species.

研究结果表明：（1）猪的品种主要包括大白猪、长白猪、杜洛克猪和香猪；牛的品种有西门塔尔牛、短角牛、婆罗门牛、娟姗牛；羊的品种有波尔山羊；鸭的品种有北京鸭、樱桃谷肉鸭、绍兴麻鸭；鸡的品种有新兴三黄鸡、广西土顶鸡、新兴麻顶鸡、黑羽竹丝鸡等品种。

A portable photosynthesis system made by PPSYSTEM Ltd. was used to study the photosynthetic properties of 3 cultivarsof Rubus idaeus under the field conditions. The results indicated that the individual leave net photosynthetic rates had 2 peaks during a day,an obvious photosynthetic midday slump was observed in A,there was a significant difference in midday depression among the 3 cultivars;evaporation rates of B and C had 2 peaks during a day,while A had 1 peak,and an obvious midday slump was observed in B and C;Stomatic conductance is the key factor of midday slump;Compared with B and C,A had a higher water using efficiency,which will consume less soil water.

利用英国PP-SYSTEM公司生产的TPS-1便携式光合作用测定系统，对3个树莓品种的光合特性进行了比较研究，结果表明树莓叶片光合速率日变化呈双峰曲线，A品种&日中低落&现象明显，B、C品种不甚明显；B、C品种的蒸腾速率日变化曲线基本上为双峰型，日变化过程中的&午休&现象非常明显，而A品种为单峰型，日变化过程中的&午休&现象不甚明显；此外，叶片气孔导度与叶片光合速率的日变化趋势基本一致，呈平行变化趋势，说明气孔导度是影响光合速率的直接因子；较B、C品种而言，A品种具有较高的水分利用效率，说明其更能节约并有效地利用土壤水分。

A it is predominantly derived from the initial variety or from a variety which itself was predominantly derived from the initial variety, while retaining the expression of essential characteristics that result from the genotype or combination of genotypes of the initial variety; an essentially derived variety may have been obtained by the selection of a natural or induced mutant or of a somaclonal variant, by the selection of a variant individual from plants of the initial variety, by backcrossing, by a transformation by genetic engineering, or by any other similar method

一个品种主要由原始品种演化而来，或主要由原始品种的实质性派生品种演化而来，同时保留了来自原始品种基因型或基因型组合的基本特征的表达；一个实质性派生品种可能通过选择自然变异或诱变或体细胞无性变异、原始品种植株的个体变异的选择、回交、基因工程的改造或任何其它类似方法而获得。

The mechanisms for the differences among rice cultivars in Cd uptake and translocation There were significant differences in root oxidating abilities and soil redox potential between two typical rice cultivars, Shan you 63 and Wu yun jing 7, that are greatly different in Cd uptake from soil. The root oxidating abilities and soil Eh were accordant with Cd uptake for the cultivars. The difference between the two cultivars in Fe concentrations of root iron plaque was also significant. The cultivar with higher Fe concentrations in root iron plaque absorbed less Cd from soil.

四、水稻不同品种对镉吸收及分配存在差异的生理机理对土壤中Cd吸收能力差异很大的水稻不同品种间，根系氧化力和土壤氧化还原电位有显著差异，品种的根系氧化力和土壤氧化还原电位与该品种对Cd的吸收能力间有很好的一致性；水稻不同品种间，根表铁氧化膜的含铁量有显著差异，根表铁氧化膜含铁量高的品种，对土壤中Cd的吸收能力低；盆栽水分腾发量高及根系伤流液Cd浓度高的品种，吸收积累Cd的能力强。

Difference of nitrogen competition and utilization in relay system Relay-planted with same late maturity or early maturity spring-sown maize, the yearly nitrogen absorption quantity of summer-sown late maturity maize YD 13 was highest, those of summer-sown middle maturity maize were middle, and those of summer-sown early maturity maize were lowest. While relay-planted with middle maturity, the yearly nitrogen absorption quantity of summer-sown late maturity maize YD13 was highest, those of summer-sown early maturity maize were middle, and those of summer-sown middle maturity maize were lowest.

不同熟期春夏玉米套作氮素竞争利用及其对产量和品质的影响 2.1 套作体系氮素竞争利用差异研究结果表明，与相同晚熟、早熟春玉米套作的夏晚熟品种YD13套作模式全年吸氮量均较高，其次是中熟品种，早熟品种全年吸氮量最低；而与中熟春玉米品种套作时，仍以夏晚熟品种YD13套作模式全年吸氮量最高，其次是早熟品种，中熟品种套作模式全年吸氮量最低。

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。