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Theoretical analyses of testing efficiency in long-term breeding of poplar

Journal of Forestry Research 2005年第4期16卷 275-280页

作者： LI Huo-gen Dag Lindgren Darius Danusevicius CUI Jian-guo College of Forest Resources and Environments Nanjing Forestry University Nanjing 210037 P. R. China. Department of Forest Genetics and Plant Physiology Swedish University of Agticultaral Sciences S-901 83 Umed Sweden. Department of Forest Genetics and Reforestation Lithuanian Forest Research Institute LT-4312 Kaunas reg. Lithuania. College of Forestry Shenyang Agricultural University Shenyang 110161 R R. China.

The major goal for long-term poplar breeding can be formulated as maximizing annual progress in Group Merit Gain at a given annual budget （GMG/Y＊）. To evaluate different breeding scenarios, a deterministic simulator BREEDING CYCLE ANALYZER covering the most important aspects （gain, cost, time, technique, and gene diversity） of a full breeding cycle was used. The breeding strategies considered was based on pairwise crossing of the selected breeding population and balanced within family selection for the next breeding population. A main scenario and a number of alternative scenarios within these constraints were evaluated using estimates of the best available inputs for poplars. In focus was a comparison between three different testing scenarios for selecting the parents mated to create future breeding generations, thus selecting based on phenotype, clone test or progeny test. For the main scenario, the highest GMG/Y, and the optimal selection age for clone, phenotype and progeny strategies were 0.7480 %, 0.6989% and 0.4675%; 7, 6, and 11 years respectively. Clone test was best except when heritability was high, plant price was high or total budget was low; phenotype strategy was the second except for the case of extremely low narrow-sense heritability, for which the progeny strategy was a little more efficient than phenotype strategy. GMG/Y was markedly affected by narrow-sense heritability, additive variance at mature age, rotation age, plant-dependent cost, total budget and the time needed to produce the test plants, while diversity loss and recombination cost had rather weak effect on GMG/Y. Short rotation age and cheap testing cost favoured all three testing strategies. Comparably short rotation age, low plant-dependent cost and high total budget seem to promote early selection for progeny strategy.

关键词： Poplar Group merit gain testing efficiency Breeding strategy Clonal testing Progeny testing

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Flexible,efficient,and accurate tests for epidemics

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Science China Mathematics 2024年第8期67卷 1881-1898页

作者： Linjiajie Fang Bing-Yi Jing Shen Ling Qiyue Wang Qing Yang Data Science and Analytics Thrust The Hong Kong University of Science and TechnologyHong KongChina Department of Statistics and Data Science Southern University of Science and TechnologyShenzhen 518055China Department of Mathematics and Statistics Dalhousie UniversityHalifaxNS B 3H 4R 2Canada Department of Mathematics The Hong Kong University of Science and TechnologyHong KongChina

Group testing involves discovering a small subset of distinguished subjects from a large population while efficiently reducing the total number of *** has been widely used for industrial testing,information technology,and biology,especially epidemic ***,in reality,are noisy for the presence of false *** tests are accurate but time-consuming,while others are cheaper but less *** which test to use is constrained by various considerations,such as availability,cost,accuracy,and *** this paper,we propose flexible,efficient,and accurate tests(FEATs).FEATs are based on group testing with simple but careful designs by incorporating ideas such as close contact cliques and repeated *** could dramatically improve the efficiency or accuracy of existing *** example,for accurate but slow tests,the FEAT can improve efficiency multiple times without compromising *** the other hand,for fast but inaccurate tests,the FEAT can sharply reduce the false-negative rate(FNR)and significantly increase *** justifications are *** point out some scenarios where the FEAT can be effectively employed.

关键词： epidemiology control blood testing testing efficiency testing accuracy

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A new method for improving efficiency of protocol testing

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Frontiers of Electrical and Electronic Engineering in China 2007年第3期2卷 273-276页

作者： ZHAO Baohua JIANG Zhenhai Department of Computer Science and Technology University of Science and Technology of ChinaHefei 230027China

Traditional solutions have encountered some bottleneck in improving the efficiency of protocol testing.A novel method that records the test sequence dynamically is *** dynamically reordering algorithms are brought forward in line with different fault *** impact of the new method of testing efficiency is also *** results demonstrate that the proposed solution is better than the traditional ones in terms of testing efficiency.

关键词： conformance testing test sequence dynamic reordering testing efficiency

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