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以主成分分析为基础,对2004年全国青贮玉米南方区试点的42个品种的生产性能进行了综合评价,以减少相关性状对青贮玉米区试品种综合评价的影响．结果表明:用于评价的生育期、株高、穗位高、成熟时绿叶数、收获时乳线位置、鲜重、含水量、干重和籽粒产量9个性状之间存在相关性;5个主成分(生物产量、籽粒产量与含水量、收获适期、收获品质和植株高度)解析了原变量87．23％的变异信息,用这5个相互独立的因子对42个品种进行综合评价表明,42个待评品种中有31个品种的综合评价得分高于3个对照的最高综合评价得分,其中云优78、雅玉15、YA74872、DH3930、 YA0482、渝3137、科多4号、辽627、宜22-5和南2260分别排在1～10位． 相似文献
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为了简化小豆品种综合评价体系,采用主要性状的相关性、主成分及聚类分析,对30个小豆品种进行综合评价。结果表明,11个性状的变异系数在26.38%～5.66%之间,其中主茎分枝的变异系数最大,荚长的变异系数最小。相关分析表明,单株产量与全生育期、生育后期、株高、主茎分枝、单株荚数呈极显著正相关。主成分分析表明,11个主要性状可用5个主成分来表述(累积贡献率达92.3955%)。主成分聚类,筛选出单荚粒数、单株荚数、主茎分枝、生育前期、株高和百粒重6个因子来代替原有的11个性状指标,简化了小豆品种综合评价体系。经综合评价,唐山本地的2个品种排在前2位,来自东北的几个品种位居最后。 相似文献
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为探究内蒙古自治区高粱品种的特点,客观评价高粱品系,对内蒙古登记的92个高粱品种的13个主要农艺性状进行变异分析、主成分分析、隶属函数法、聚类分析和同异分析。结果表明,92个品种的13个性状变异系数在4.01%～56.66%之间。通过主成分分析,将92个品种的农艺和品质性状综合成为9个相互独立的综合指标(主成分值),这9个主成分值的累计贡献率达88.119%,再将各主成分得分值和贡献率进行计算,求出其综合评价D值,基于D值采用欧氏距离及类平均法将92个品种分为四大类：第Ⅰ类具有长生育期、株高较高、穗粒质量和千粒质量较大的特点;第Ⅱ类具有株高适中、支链淀粉含量适中、穗粒质量较大的特点;第Ⅲ类具有生育期相对较长、总淀粉含量相对较高、粗脂肪含量较低的特点;第Ⅳ类具有株高较低、生育期相对较短、穗粒质量较小、总淀粉含量和单宁含量适中、抗病性一般的特点。将同异分析法求出的联系度μ(W)与综合评价D值相结合,从92个品种中选出7个综合性状优良的品种,通过对这些品种的筛选,以期为今后内蒙古地区高粱育种目标的科学确立及品种推广提供参考。 相似文献
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采用层次分析法对临汾市23个品种的外引园林植物进行综合评价。根据综合得分将其分为3个等级:Ⅰ级(≥0.8)园林应用价值高的品种5个;Ⅱ级(0.7~0.8)园林应用价值较高的品种13个;Ⅲ级(0.6~0.7)园林应用价值一般的品种5个。从研究结果看,该评价系统能比较客观、准确地反映常用外引园林植物在临汾市的生长状况,为其他城市评价外引园林植物指标的建立提供了参考。 相似文献
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通过文山州试点2019年禾朴农业玉米品种联合体区域试验,鉴定9个玉米品种主要农艺性状,采用方差分析和主成分分析比较并进行综合评价。结果表明,有7个品种产量显著高于海禾2号(CK),其中布单339产量最高;主成分分析表明,对产量和品种综合评价影响较大的主成分有3个,第1主成分方差贡献率为46.229%,综合反映品种的经济性状、抗逆性和适应性,可以作为高产玉米各性状的综合指标。第2主成分贡献率为36.945%,特征向量值最大的是株高、单穗粒重和穗位高,指向玉米品种的形态性状和经济性状。第3主成分的方差贡献率为10.473%,反映的是抗倒性等抗性。参试品种中布单339、禾朴596和宣玉1536综合表现优良,可以在文山地区大面积示范和种植。 相似文献
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在阿克苏地区开展温室为延茬黄瓜品种对比试验,结果表明,鲁缘4号产量高、抗性强、综合评价高,其次是津绿3号、津优30、太空黄瓜,这4个品种为阿克苏地区比较理想的温室秋延茬黄瓜品种。 相似文献
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大白菜品种对软腐病抗性评价指标的研究 总被引：2，自引：0，他引：2
用8个品种测定了大白菜软腐病菌的根系侵入、潜伏侵染和伤口侵染,由此建立了品种抗性评价的3个指标,即根系侵染抗性、潜伏侵染抗性和伤口侵染抗性,以及属于这3个指标的7个参数。将不同品种在7个参数中的测定值从高到低(只一项为从低到高)分别划分为5个数值范围,并相应地记为1～5分,以表明品种抗性从弱到强的差别;以得分总和作为品种抗病性的综合定量指标。由此将8个品种分为综合抗性强、中、弱3组,其中以品种81-5和福山包头综合抗性最强,品种青石最弱。 相似文献
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中原牡丹不同品种花期与其其他生物学性状的关系研究 总被引：1，自引：0，他引：1
[目的]汇集和研究牡丹种质资源,研究牡丹花期与其其他生物学性状的关系。[方法]采用比较法分析收集到的牡丹品种的生态适应性。采用数量分类法进行品种分类。[结果]从种质资源圃的818个牡丹品种中鉴定出576个,其中早花品种58个,中花品种400个,晚花品种118个。早、中、晚品种的花色均以红色系、紫红色系为主。早花品种的花型以荷花型、菊花型、蔷薇型居多,株型以半开张型为主,叶型分布较均匀,多数生长势较强;中花品种的花型以皇冠型、绣球型居多,株型以半开张、直立型为主,叶型以中形长、圆叶型为主,生长势以中等为主;晚花品种的花型以皇冠型、绣球型为主,株型以半开张型为主,叶型以中形长叶型较多,生长势有弱化的趋势。[结论]解决了"同物异名,同名异物"的现象,明确了牡丹不同品种花期与花色、花型、花态、株型、叶型、生长势的关系。 相似文献
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通过对武汉梅园100个开花良好的梅花品种进行多年结果习性的观察研究,选择出了2个类型的花果兼用梅花品种:①作为果品加工的花果兼用梅花品种8个;②作为实生选种的花果兼用梅花品种8个。同时,对相应的栽培技术如修剪、施肥等进行了一些探索。 相似文献
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Cong GUO Wei GUAN XiangGuo ZENG QingHua ZHANG FaYun XIANG YueJun SONG YongChao HAN 《中国农业科学》2019,52(24):4632-4646
【Objective】The objective of this study was to analyze 11 phenotype indexes of 60 rose cultivars and to illustrate the variation rules and the genetic diversity coefficient of each index and the correlation between them. The principal component analysis was used to select an optimal evaluation and calculation method to provide reference for rational clustering of rose cultivars. 【Method】Taking 11 statistical characters of 60 modern rose cultivars in field as the research object, the variation index and Shannon-wiener genetic diversity index of each character data in rose cultivars were analyzed with SPSS19.0 and Microsoft Excel 2007, and the correlation analysis and principal component analysis of each character were carried out. Based on the composite score of principal components and each principal component score, the clustering of the rose cultivars were done.【Result】The statistical results of phenotypic traits showed that, the majority of the tested roses were erect and expanded shrubs, which accounted for 53% and 35% of the total cultivars respectively. The number of leaflets of mature leaves was 5, accounting for 68% of total cultivars. The average whole leaf length, top leaflet width, internode length and average flower diameter of 60 rose cultivars were 11.6, 3.2, 3.6 and 7.6 cm, respectively. The variation coefficient of each quantitative index ranged from 21% to 25%, which was not large. The main color of rose was pure color, accounting for 82% of the total. Among them, purple and yellow flowers were the most. The cultivars with successive flower heads accounted for 65% of the total number, and the flower shapes were mainly ball-shaped and cup-shaped, accounting for 33% and 32% of the total cultivars, respectively. The main senescence modes of rose flowers were petal abscission and flower withering, accounting for 47% and 43% of the total cultivars, respectively. The variation range of the genetic diversity coefficient of each index was between 0.62 and 3.73, among which the diversity index of 8 traits was above 1, the highest was the whole leaf length, and the lowest was the leaflet number. The genetic diversity coefficient of flower color among qualitative traits was the highest. There was an extremely significant positive correlation between whole leaf length and the top leaflet width, the internode length and the whole leaf length, the internode length and the top leaflet width. The flower head number was very significantly negatively correlated with the internode length. There was a significantly positive correlation between the senescence type and the growth habit, the number of flower heads was significantly positive correlated with the number of leaflets and the flower type, but significantly negative correlated with the flower diameter. The results of principal component analysis showed that the 11 phenotype indexes could be simplified into 4 principal component factors, and the variance contribution rate of the 4 principal components was up to 63.28%, among which the variance contribution rate of the first principal component was up to 21.1%. Each principal component factor mainly represented the index variables, such as leaf shape, flower shape, number of flower heads, number of petals and flower aging mode. Based on the composite score of principal components and each principal component score, the 60 cultivars of roses were clustered, and the distribution range of the composite score of principal components of each cultivar was from -1.878 to 1.522. The rose cultivars could be divided into 4 clusters according to the scores, and each cluster was represented by 8, 36, 15 and 1 cultivars, respectively. The classification of each cluster reflected the comprehensive performance of roses in the field. 【Conclusion】Modern rose had a rich diversity of flower color and leaf shape indexes, and some flower shape indexes were significantly related to leaf shape or growth habit. The conclusions would contribute to rose breeding and selecting. The four principal component indexes and the clustering of cultivars selected in the study provided theoretical basis for the preservation and application of the existing rose cultivars. 相似文献
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大丽花花型群体表型性状遗传多样性研究 总被引：3，自引：0，他引：3
本文以4个花型群体84个优良大丽花品种为试材,对大丽花7个表型性状的遗传多样性进行分析。结果表明：大丽花不同花型群体间在茎粗、叶长、叶宽、花径和花梗长性状上差异显著,在株高和叶柄长性状上差异不显著;巨大花型的在叶长、叶宽和叶柄长性状上分化明显,其它花型的叶分化不明显,4个花型群体间在花径和花梗长性状上分化均明显;花径在大花型中与株高、茎粗呈极显著负相关,小花型中与叶柄长显著正相关;4个花型群体内叶长与叶宽均呈极显著正相关,同一花型群体内,不同性状相关程度有所差异。 相似文献
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通过对引进的6个百合栽培品种发育过程、主要性状的观测分析,综合比较各品种的生长情况和特性,结果表明：“木门”、“罗宾娜”、“索邦”、“西伯利亚”4个品种在长势、株型、花型、花期、抗冻性等方面比较优良,适合在固原地区日光温室栽培. 相似文献
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菏泽和洛阳芍药品种资源表型多样性研究 总被引：2，自引：1，他引：1
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[目的]建立盆栽东方百合品种综合评价体系,筛选出适合广西地区规模化设施栽培的优良百合品种.[方法]观测统计12个盆栽东方百合品种的20个植物学性状指标,应用层次分析法从花性状、茎叶性状和生长适应性3个方面构建盆栽东方百合品种的综合评价体系.[结果]通过对花性状、茎叶性状和生长适应性赋权,确定评价20个性状指标的权重值,其中叶烧情况、成花率、花径、落叶情况和株型紧凑度的总排序权重所占比重较大,分别为0.1429、0.1372、0.1139、0.0714和0.0677;根据品种综合评价得分,将12个东方百合品种划分为优秀、优良、一般和较差4个等级,其中,Entertainer、Starlight express、Souvenir、Bahamas和Pink champion 5个品种综合性状表现优良,适合小规模生产;Fortune和After eight综合性状表现差,可淘汰.[结论]东方百合品种Entertainer、Starlight express、Souvenir、Bahamas和Pink champion具有花朵硕大、花色艳丽、花期长、株型紧凑和适应性强等优点,可作为广西地区设施盆栽百合品种引进推广. 相似文献