Wheat Cultivars Adapted to Post-Heading High Temperature Stress   总被引：3，自引：0，他引：3  

H. Tewolde  C. J. Fernandez  C. A. Erickson 《Journal of Agronomy and Crop Science》2006,192(2):111-120

The existence of genetic variation in wheat for tolerance to high temperature stress has been reported but cultivars released for a particular production system often are not characterized. The objective of this study was to identify and describe the characteristics of wheat cultivars adapted to production systems with risks of high temperature during the post‐heading period. Fifteen diverse wheat cultivars and one unreleased genotype were evaluated at the Texas A&M University Agricultural Research and Extension Center, Uvalde, TX, during two seasons characterized by daily maximum temperatures as high as 36 °C. Measurements during both seasons included days to heading, days to physiological maturity and grain yield. Large and significant (P < 0.05) grain yield differences were measured among cultivars within each season. Yield varied between 2979 and 4671 kg ha^?1 in the first season and between 1916 and 5200 kg ha^?1 in the second season. Late planting in the second season delayed heading date resulting in the post‐heading period to coincide with periods of high temperatures. Cultivars that headed early, in general, yielded better than cultivars that headed later within each season with yield reduction of 35.3 kg ha^?1 in the first season and 91.0 kg ha^?1 in the second season for every 1 day delay in heading after mid‐March. Early‐heading cultivars outperformed later‐heading cultivars because of two distinct advantages: the early‐heading cultivars had longer post‐heading and, therefore, longer grain filling period than the later‐heading cultivars. In addition, early‐heading cultivars completed a greater fraction of the grain filling earlier in the season when air temperatures were lower and generally more favourable. The advantage of earlier‐heading cultivars was also manifested in the amount of green leaves retained to anthesis. Earlier‐heading cultivars produced fewer total leaves per tiller but retained more green leaves and lost fewer leaves to senescence at anthesis than later‐heading cultivars. The results suggest that early heading is an important and effective single trait defining wheat cultivars adapted to production systems prone to high temperature stress during the post‐heading period.  相似文献   

Lipid oxidation in a chicken muscle model system: oxidative response of lipid classes to iron ascorbate or methemoglobin catalysis     

Sista RV  Erickson MC  Shewfelt RL 《Journal of agricultural and food chemistry》2000,48(5):1421-1426

Catalysis by iron ascorbate and activated methemoglobin generated different oxidative responses in chicken muscle model systems. In iron ascorbate systems, large increases in hydroperoxides and thiobarbituric acid-reactive substances (TBARS) occurred during the initial stage of incubation. Thereafter, iron ascorbate catalysis led to a slow increase in the oxidation of triacylglcyerol (TG) and sarcoplasmic reticulum (SR) membrane lipids. By the end of incubation, 24, 36, and 32% of the initial content of n-3 fatty acids in free fatty acids, TG, and SR single-lipid model systems catalyzed by iron ascorbate had been lost. Reduced losses of n-3 fatty acids were observed in the SR and TG fractions (0 and 24%, respectively) when iron ascorbate model systems contained all three lipid fractions (mix). Hydroperoxides and TBARS in model systems catalyzed by activated methemoglobin were characterized by a lag phase during most of the incubation. Consistent with their role as antioxidants, losses of alpha-tocopherol (42-49%), gamma-tocopherol (36-42%), and protein sulfhydryls (41-52%) were observed in model systems catalyzed by activated methemoglobin. SR and mix model systems were 30-50% slower to oxidize than TG model systems when activated methemoglobin served as the catalytic agent.  相似文献   

Role of the airways in exercise-induced pulmonary haemorrhage.     

H H Erickson  C A Kindig  D C Poole 《Equine veterinary journal》2001,33(6):537-539

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Exposure of pigs to a pseudorabies virus formed by in vivo recombination of two vaccine strains in sheep     

J B Katz  L M Henderson  G A Erickson  F A Osorio 《Journal of veterinary diagnostic investigation》1990,2(2):135-136

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In vitro holding strength of the laparoscopic Miller's knot compared with open Miller's knot,open surgeon's throw,and laparoscopic surgeon's throw in a vascular pedicle model     

Andrea K. Erickson DVM  W. Alexander Fox-Alvarez DVM  MS  DACVS-SA  Penny J. Regier DVM  MS  DACVS-SA  J. Brad Case DVM  MS  DACVS-SA 《Veterinary surgery : VS》2020,49(8):1563-1570

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High-resolution images and drone-based LiDAR reveal striking patterns of vegetation gaps in a wooded spinifex grassland of Western Australia     

Getzin  Stephan  L&#;ns  Christian  Yizhaq  Hezi  Erickson  Todd E.  Mu&#;oz-Rojas  Miriam  Huth  Andreas  Wiegand  Kerstin 《Landscape Ecology》2022,37(3):829-845

Landscape Ecology - Vegetation patterns in hummock grasslands of Australia’s arid interior can be very complex. Additionally, the grasslands are interspersed with variable amounts of trees...  相似文献   

Alpharma Beef Cattle Nutrition Symposium: parameterizing health and performance expectations of feedlot cattle     

Branine ME  Galyean ML  Zinn RA  Erickson GE 《Journal of animal science》2011,89(6):1863-1864

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Submillimeter heterodyne detection of interstellar carbon monoxide at 434 micrometers     

Fetterman HR  Koepf GA  Goldsmith PF  Clifton BJ  Buhl D  Erickson NR  Peck DD  McAvoy N  Tannenwald PE 《Science (New York, N.Y.)》1981,211(4482):580-582

A submillimeter heterodyne radiometer, developed for astronomical applications, uses an optically pumped laser local oscillator and a quasi-optical Schottky diode mixer. The resultant telescope-mounted system, which has a noise temperature less than 4000 K (double sideband) and high frequency and spatial resolution, has been used to detect the J = 6 --> 5 rotational transition of carbon monoxide at 434 micrometers in the Orion molecular cloud. The measurements, when compared with previous millimeter-wave data, indicate that the broad carbon monoxide emission feature is produced by an optically thin gas whose temperature exceeds 180 K.  相似文献   

ON THE MAPPING OF THE VELOCITYPOTENTIAL AND STREAM FUNCTIONS OF AN IDEAL FLUID     

Erickson AC 《Science (New York, N.Y.)》1935,81(2098):274-275

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Hymenoptera: Pure Venom from Bees, Wasps, and Hornets     

O'connor R  Rosenbrook W  Erickson R 《Science (New York, N.Y.)》1963,139(3553):420

Pure venom can be obtained from bees, wasps, and hornets by electrical stimulation with inexpensive apparatus.  相似文献