稳定性参数在品种区试中应用问题商榷

新品种新组合多点联合区试 ,实际上是一种生态试验 ,它是研究各品种、各组合在不同条件下的适应性 ,用稳定性参数来评估各品种、各组合的适应范围 ,为新品种或新组合的合理布局提供科学依据。最近有闲翻阅了一些专业文献 ,发现登载的区试方面的文章似缺了点什么。新品种新组合有不同生态地点的试验数据 ,有重复 ,按统计的条件具备了 ,稳定性参数的公式写出来了 ,ｂｉ、Ｓ2ｄ 计算出来了 ,于是结论应运而生。但是通达稳定性参数计算原理的同志 ,认为其结论含糊不清 ,有些牵强附会。分析原因 ,主要是未能正确完整地完成运算的全过程。作者撰文…     

水稻区试品种稳定性分析的AMMI模型应用

将ＡＭＭＩ模型应用于水稻区试稳定性分析,并将分析结果与线性回归分析进行比较,ＡＭＭＩ模型可深入分析品种与区试地点的互作,为水稻区试品种稳定性评价提供参考。     

水稻区试资料的非参数度量分析

采用非参数度量方法对2004年漳州市晚季杂交水稻区试资料进行分析。结果表明:(1)丰产性最好的品种为先优95,产量低于和显著低于该品种出现率P i(%)和P i(′%)分别为74.31%和61.11%;丰产性较好的有特优316,其P i(%)和P i′(%)分别为68.06%和54.17%;丰产性最差是II优05,P i(%)和P i(′%)分别为31.94%和15.28%。(2)参试品种的产量稳定性差异显著。稳定性最好的是先优95(Si=1.933);稳定较好的有两优1816和特优103(Si=2.300);稳定性最差的是两优451(Si=6.533)。(3)6个试点分辩品种差异的能力[Dj(%)]大小顺序为漳浦>龙海>长泰>平和>漳州>诏安。     

玉米区试品种稳定性分析

本文采用“Eberhart和Russell(1966)稳定参数法”对1997年黑龙江省第二积温带中部平原区玉米区试品种进行稳定性分析。分析结果表明,玉米区试品种间产量稳定性存在明显差异。其中,稳产性较好的有4个：海942、佳试24、东禾1、绥北2103,以绥北2103稳产性最佳,高产不稳产品种有2个,低产不稳产品种有6个。     

水稻品种区试随机误差的产生原因与改进建议

水稻品种区试结果的准确度是水稻生产品种选择的主要依据。根据水稻品种区试工作实践,分析了水稻区试中随机误差产生的常见原因,并提出了减少这些随机误差的建议。     

2001年南方稻区国家水稻品种区试结果简报

２００１年南方稻区国家水稻品种区试工作紧紧围绕种植业结构调整、西部大开发和加入ＷＴＯ调整工作思路、改进试验方法、提高试验质量。在“九五”工作基础上 ,２００１年启动了优质稻品种区试和武陵山区中稻品种区试 ,调整了试验熟组设置和试点布局 ,加强了试验管理和实地考察 ,制定和修订了试验质量考评标准和技术操作规程 ,取得了显著的工作成效。一、２００１年南方稻区国家水稻品种区试工作取得的成效１．试验规模扩大２００１年试验类型 (熟期 )组１５个、试验点次２０８个、参试品种１５４个 ,分别比２０００年增加６７ %、３９%、…     

水稻区试品种抗稻瘟病鉴定结果分析

水稻品种区域试验是筛选抗病良种的主要途径。定点分析了2004年至2010年近7年来湖北恩施两河病圃水稻区试品种抗稻瘟病鉴定结果,提出以往高产、优质育种工作中的不足、建议加大抗性品种的筛选力度,促进抗病品种选育水平的提高。     

应用AMMI模型评价湖南棉花区试品种的稳定性

应用AMMI模型对2007年湖南省棉花区试QB组产量进行了分析,结果表明:通过AMMI模型的分析结果能更有效地解释基因与环境间的互作,从而提高综合评价参试品种稳定性的能力.     

应用HSC法评价蚕豆高产稳产性

用高稳系数（HSC）法分析了1999年吞豆区域试验7个参试品种的高产稳产性，结果表明，95－08高产又稳产，95－20产量一般，但稳产性好，95－25丰产性最好，但稳产性很差，95－22稳产性最好，但丰产性最差，95－23既低产又不稳产，HSC是反映高产性的参数，又是反映稳产性的参数，使高产与穗产两因素得到了科学的有机结合，用HSC法分析评价蚕豆新品种高产稳产性是一种准确，简便，可靠的方法。     

2001年北方稻区国家水稻品种区试优良品种

２００１年全国北方稻区水稻品种区试共组织了豫粳６号组、中作９３组、金珠１号组、秋光组、吉玉粳组和东农４１６组共６个熟期组的区试及生产试验。供试品种 (组合 )共计７４个 ,试验点次７６个。经过对试验资料的初步分析总结 ,有１２个品种 (组合 )在区试和生产试验中比较突出 ,拟推荐全国品种审定委员会审定。现介绍如下 :１．津优９７０１杂交稻组合 ,天津市农作所选育 ,２０００～２００１年参加了国家北方水稻区域试验。２０００年初试平均单产５７０．７ｋｇ／６６７ｍ２,较对照中作９３增产１７．９ % ,达显著水平。２００１年续…     

杂交稻优优122的丰产性稳定性适应性分析

利用１９９６和１９９７两年早造广东省区域试验资料以及１９９７年全国籼型交稻（中早熟组）区域试验资料,对优优１２２的丰产性、稳定性和适应性进行了分析和比较,结果表明,优优１２２的丰产性,稳定性和适应性都明显地优于对照 当,是一个较为理想的中早熟杂交稻新组合。     

Effects of visible light irradiation on the oxidative stability in rice bran

Raw rice bran was treated with or without visible light exposure at room temperature or stored at 40 °C in the dark for 10 days and rice bran oil (RBO) was recovered from each rice bran. Headspace oxygen content from rice bran and conjugated dienoic acid (CDA) value, acid value, content of γ-oryzanol, and fluorescence intensity in RBO were analyzed to determine the effects of visible light on the oxidative stability in rice bran. Headspace oxygen content in visible light irradiated rice bran (RBL) decreased by 12.8% for 10 days while those in the dark (RBD) and stored at 40 °C (RBT) decreased by 5.87 and 5.35%, respectively, implying visible light irradiation accelerates the consumption of oxygen. CDA values in RBO from RBL were significantly higher than those in RBO from RBD and RBT (p < 0.05). However, acid values in RBO were not significantly different among samples (p > 0.05). Both γ-oryzanol content and fluorescence intensity in RBO from RBL were significantly lower than those in RBO from RBD and RBT (p < 0.05). Fluorescence intensity, which is related to the content of chlorophylls, decreased in samples under light only, implying that chlorophyll photosensitization may play important roles in the acceleration of lipid oxidation in rice bran.     

国家甜菜品种区域试验品种稳定性分析

对1999年国家甜菜品种区域试验结果进行统计分析,求得各参试品种的稳定性统计参数,即品种(V)×地点(U)互作方差估计值()和变异系数(iCKvu),据此对参试品种分析了稳定性,结果表明:所有的参试品种都表现出了较好的稳定性,具有广泛的适应性和使用价值。ik^2vu     

Evaluation of yield,stability and adaptability of national winter rapeseed regional trials in the upper Yangtze River region in 2017-2018

Rapeseed variety needs to be tested by regional trial in multiple sites for many years before being applied in market in China. Performants of rapeseed were affected by the interaction of sites and varieties. Evaluation of regional trials is very important for guiding rapeseed breeding. GGE (genotype main effects and genotype ​× ​environment interaction) biplot was used to evaluate yield, stability, adaptability, representativeness and discrimination of national winter rapeseed trials in the upper reaches of Yangtze River in 2017-2018. Results showed that the main effects of genotype (G), environment (E) and genotype ​× ​environment interaction (G × E) were significant (P ​< ​0.01) for yield. Among them, E accounted for 46.95% total variation on average, G and G × E accounted for 19.34% and 33.71% respectively. Eight varieties were found with high-yield, excellent stability and adaptability, including ‘Yiyou 29’, ‘Xiwang 920’, ‘Liyouza 108’, ‘Nanyou 546’, ‘Dadi 195’, ‘Jiayou 1’, ‘Huayouza 28’ and ‘Yuhua 2’. Test sites included Nanchong, Mianyang, Wanzhou, Shuangliu and Chengdu in Sichuan Province and Zunyi together with Guiyang in Guizhou Province were selected for their excellent representativeness and discrimination. These results would provide theoretical basis for rapeseed breeding.     

Direct measurement of rice bran lipase activity for inactivation kinetics and storage stability prediction

Rice bran is a rich source of valuable nutrients and has potential for high-value applications. Endogenous lipases catalyze the hydrolysis of rice bran oil to free fatty acids, which initiates lipid oxidation. The evaluation of the success of rice bran stabilization processes in terms of the degree of lipid oxidation and shelf-life has so far relied on the measurement of free fatty acid content over a storage period of 3–6 months. In the present study, a photometric and a titrimetric pH-stat method for direct lipase activity measurement immediately after debranning were adapted to rice bran. The photometric method was further applied to determine rice bran lipase/esterase inactivation kinetics, which are useful to optimize stabilization treatments in order to prevent overprocessing and retain maximum level of nutrients. Rice bran was heat-treated in a specialized, hermetically sealable reactor at controlled holding times (5–40 min), temperatures (70–145 °C) and moisture contents (10–20%). Temperature dependency of the lipase/esterase inactivation rate could be described by the Arrhenius equation. Empirical findings on the importance of moisture content for effective rice bran stabilization could be quantified. Furthermore, the results demonstrate the great potential of the method to predict the shelf-life of stabilized rice bran without time-consuming storage tests.     

寒地水稻优良品种对比试验

为筛选出适合宁安市种植的优质水稻品种,特选取五优稻1号、五优稻3号、五优稻A、五技选98-1、五源2000-2、五常03-88、松粳1号、2000-17、哈04-19等17个品种的进行对比试验,结果表明,五优稻3号成熟度好、商品性佳、产量在17个参试品种中最高,可达616.7 kg/667 m2;其次是哈04-19产量为610.8 kg/667 m2,可在2008年扩大面积继续试验。     

水稻新品种(系)产量稳定性研究

通过试验,对5个水稻新品种的产量稳定性进行分析,研究各试验品种的稳产性、高产性、特殊适应性及产量趋势,为水稻新品种推广提供科学依据。     

我国冬油菜区域试验品种的高产稳产和适应性分析

高产稳产和广适性是油菜育种的重要目标,利用GGE双标图方法对品种稳产性和适应性进行科学评价,有助于提升油菜新品种的选择效率和推广应用效果。本研究采用GGE双标图方法分析了2016-2017年长江下游国家冬油菜品种区域试验中参试品种高产稳产性和适应性。结果表明：1) 油菜产量的基因型、环境、基因型与环境互作效应均达极显著水平（P<0.01）,两组试验平均环境主效占处理平方和的66.0%,而基因型主效占8.1%,基因型与环境互作效应占26.1%。2)德徽油88和中油600丰产性好,稳产性较好;创油17号在区域试验中丰产性好而稳产性差;对照品种秦优10号丰产性较好,稳产性有待提高。3)理想指数分析揭示了中油600的高产稳产性综合表现优秀,德徽油88次之,而对照品种秦优10号的综合表现一般。4)德徽油88适宜种植区域最广,是所有参试品种中适应性最广的品种;创油17号的适应区域也较广,但同时在其余区域的表现有待提高;秦优29和中油600的适应性较好;而秦优10号、秦优29、宁杂118、宁杂158、荣华油50和苏6006等品种仅在个别区域适宜种植,适应性有待提高。     

Quality traits in winter wheat: Comparison of stability parameters and correlations between traits regarding their stability

Fluctuations of environmental conditions increase variability in both grain yield and quality of wheat (Triticum aestivum L.). In order to evaluate stability, different stability parameters of the static or the dynamic concept can be applied, which could be negatively correlated. While correlation analysis of the mean performance between traits is common, correlations between stability estimates for quality traits have not been investigated, to the best of the authors’ knowledge. Therefore, indirect, rheological and baking traits, and grain yield from two datasets were analysed, and the mean performance, each three stability parameters of the two different concepts (static and dynamic) were calculated over all environments within each dataset.Results showed that stability parameters of the same concept were significantly positively correlated for almost all traits. Between the stability concepts, there was only one significant negative correlation, indicating that no trade-off between the two stability concepts exists. A trade-off between stability and mean performance occurred only for five traits, suggesting only a weak trade-off between stability and mean performance, allowing the development of cultivars that are of both stable and of high quality. Clusters of traits that showed similar stability could be identified but were not consistent across stability parameters and datasets.     

灰色评判在水稻育种中的应用

运用灰色系统的理论与方法,根据水稻育种目标。对杂交水稻F1代测配组合的主要农艺性状进行灰色评判,筛选高产优良杂交稻组合,为水稻品种的早期选育提供理论依据。