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193篇 您的检索式:作者名="Welk"
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1Heritability of early growth traits and their plasticity in 14 woody species of Chinese subtropical forest显示文摘Aims Genetic variation in plant traits represents the raw material for future adaptive evolution.Its extent can be estimated as heritability based on the performance of experimental plants of known relatedness,such as maternal half-sib seed families.While there is considerable heritability information for herbaceous plants and commercially important trees,little is known for woody species of natural subtropical forest.Moreover,it is open whether heritability is higher for species with r-or K-strategies,for more common species with larger distribution ranges than for rarer ones,or for populations closer to the centres of distributional ranges.Methods For 14 woody species in Chinese subtropical forest,we collected 13-38 maternal seed families,assessed seed size,grew replicates of each seed family in one more and one less benign nursery environment and measured stem diameter and plant height after 7 months.Important findings For the different species,plants grew 1.8-8.1 times taller in the more benign environment.For all 14 species,variation between seed families(and thus heritability)was significant(with very few exceptions at the P<0.001 level)for seed size and for stem diameter and plant height in both nurseries.Moreover,significant seed family by nursery interactions for stem diameter and plant height for all species(P<0.001)indicated significant heritability for plasticity in these traits.Multiple regression analysis suggests that heritabilities were higher for species with higher age at reproduction and higher wood density(traits indicating a K strategy)but also for species with higher specific leaf area(a trait rather indicating an r strategy).Furthermore,heritabilities were higher for species with larger range sizes,while there was no significant relationship between heritabilities and the distance of the study area to the range margins of our study species.In conclusion,the detected large heritability estimates suggest considerable potential for the evolution of plant performance and its plasticity for trees of subtropical forest.Moreover,our study shows that the simple method of comparing plants of different maternal seed families is valuable to address evolutionary ecological questions for so far understudied species.Xueqin Zeng Walter Durka Erik Welk Markus Fischer 2017Journal of Plant Ecology2017,10,1:4
2Parental influences on physical activity in children an exploration of potential mechanisms显示文摘Welk G Wood K Morss G 2003Pediatric Ex- ercise Science2003,,15:1
3Maturity-relatedvariation in moderate-to-vigorous physical activity among9-14 year olds 显示文摘Wickel EE Eisenmann JC Welk GJ 2007Journal of Physical Activity andHealth2007,6,:1
4The male sling for post-prostateetomy urinary incontinence: a review of contemporary sling designs andouteomes显示文摘Welk BK Hersehom S 2012BJU Int2012,109,3:1
5Median and related local filters for tensor-valued images 显示文摘Martin Welk Joachim Weiekert Florian Becker 2007Signal Processing2007,87,:1
6The youth physical activity promotion model:a conceptual bridge between theory and practice显示文摘Welk J J 1999Quest1999,,51:1
7Mechanical ventilation of isola Ted rat lungs changes the structure and biophysical properties of surfactant 显示文摘Veldhuizen RA Welk B Harbottle R 2002J Appl Physiol2002,92,3:1
8Stability of variables associated with the metabolic syndrome from adolescence to adulthood: the Aerobics Center Longitudinal Study显示文摘Eisenmann J C Welk G J Wickel E E 2004Am J Hum Biol2004,16,6:1
9Effect of aporrectodea trapezoids activity on seedling growth of Pseudotsuga menziesii,nutrient dynamics and microbial activity in different forest soils显示文摘Welke S E Parkinson S E 2003Forest Ecology and Management2003,173,123:1
10Optical coher- ence tomography in dermatology 显示文摘Pagnoni A Knuette A Welke P 1999Skin Res Technol1999,5,:1
11A Comparative Evaluation of Three Accelerometry-based Physical Activity Monitors显示文摘Welk GJ Blair SN Wood K 0,,09:1
12Combined in- fluence of physical activity and screen time recommendations on childhood overweight显示文摘LAURSON K R EISENMANN J C WELK G J 2008J Pediatr2008,153,2:1
13Approaches to devel- opment of criterion-referenced standards in health related youth fitness tests 显示文摘Zhu W Mahar MT Welk GJ 2011American Journal of Preventive Medicine2011,42,2:1
14Assessing body composition among 3- to 8-year-old children :Anthropometry, BIA, and DXA 显示文摘Eisenmann JC Heelan KA Welk GJ 2004Obes Res2004,12,10:1
15Development and validation of a regression model to estimate V02peak From PACER 20-m shuttle run performance显示文摘Mahar MT Welk GJ Rowe DA 2006J Phys Act Health2006,,3:1
16Microbicidal efficacy of thiocyanate hydrogen peroxide after adding lactoperoxidase under saliva loading in the quantitative suspension test显示文摘Welk A Rudolph P Kreth J 2011Arch Oral Biol2011,56,12:1
17Diagnostic per- formance of BMI percentiles to identify adolescents with metabolic syndrome 显示文摘Larson KR Welk GJ Eisenmann JC 2014Pediatrics2014,133,2:1
18An in vivo comparison of two frequency-based electronic apex locators 显示文摘Welk AR Baumgartner JC Marehall JG 2003J Endod2003,29,8:1
19The structure-directing properties of ^2-显示文摘WELK M E NORQUIST A J STERN C L 2000Inorg Chem2000,39,18:1
20Low-density lipoprotein receptor variants are associated with spontaneous and treatment-induced recovery from hepatitis C virus infection显示文摘Andreas Mas Marques Tobias Mueller Justus Welke Stefan Taube Christoph Sarrazin Manfred Wiese Juliane Halangk Heiko Witt Golo Ahlenstiel Ulrich Spengler Uwe Goebel Eckart Schott Viola Weich Beate Schlosser Hermann E. Wasmuth Frank Lammert Thomas Berg Ecka 2009Infection, Genetics and Evolution2009,,5:1
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