Hybrid breeding for biomass yield in winter triticale: II. Combining ability and hybrid prediction     

Johannes Trini  Hans Peter Maurer  Sigrid Weissmann  Tobias Würschum 《Plant Breeding》2020,139(5):906-915

Accurate hybrid prediction and knowledge about the relative contribution of general (GCA) and specific combining ability (SCA) are of utmost importance for efficient hybrid breeding. We therefore evaluated 91 triticale single-cross hybrids in field trials at seven environments for plant height, heading time, fresh biomass, dry matter content and dry biomass. Fresh and dry biomass showed the highest proportion (23%) of variance due to SCA. Prediction accuracies based on GCA were slightly higher than based on mid-parent values. Utilizing parental kinship information yielded the highest prediction accuracies when both parental lines have been tested in other hybrid combinations, but still moderate-to-low prediction accuracies for two untested parents. Thus, hybrid prediction for biomass traits in triticale is currently promising based on mid-parent values as emphasized by our simulation study, but can be expected to shift to GCA-based prediction with an increasing importance of GCA due to selection in hybrid breeding. Moreover, the performance of potential hybrids between newly developed lines can be predicted with moderate accuracy using genomic relationship information.  相似文献   

Evaluation of a combined penetrometer for simultaneous measurement of penetration resistance and soil water content     

Yurui Sun  Peter Schulze Lammers  Daokun Ma 《植物养料与土壤学杂志》2004,167(6):745-751

A combined penetrometer is an appropriate tool to measure the soil cone resistance and the water‐content profile. As a relatively new technique, a combined capacitance‐penetrometer for the simultaneous measurement of cone index and soil water content was developed at the Department of Agricultural Engineering of Bonn University in 2002. The objective of this study was the evaluation of the effectiveness and applicability of the innovated penetrometer with a focus on three aspects: (1) A capacitance sensor with two electrode configurations was calibrated for silt loam, sandy loam, and sand. The calibration results show that both electrode configurations have sufficient water‐content sensitivity, but soil‐specific calibrations seem necessary. (2) Under laboratory conditions, the dynamic resolution and response of the capacitance‐penetrometer were validated, and its radius of influence was determined. (3) The field measurement results demonstrate that this measurement technique can be used to improve the interpretation quality of soil cone index data.  相似文献   

Our educational institution has 50 years in the service of veterinary medicine     

W Schulze 《Berliner und Münchener tier?rztliche Wochenschrift》1989,102(7):233-235

The paper gives an overview of the history of the school of vet. med. technicians at the School of Veterinary medicine Hannover.  相似文献   

牧场土壤含水率与坚实度空间变异与相关性分   总被引：3，自引：2，他引：1  

程强  孙宇瑞  林剑辉  曾庆猛  Schulze Lammers P  Schellberg J 《农业机械学报》2009,40(3):103-107

利用土壤水分/圆锥指数复合测量装置,应用精细农作技术体系网格定点测量与GPS定位,在一块面积约1.27 hm2的草地上获取了土壤含水率与坚实度空间分布基础数据,并针对采样过程中出现的数据缺失,用偏最小二乘法对数据进行修补.然后运用克里格插值法进行数字化成图,并在此基础上分别对含水率与坚实度的空间变异性及两者的相关性做了分析.  相似文献   

The quantitative composition of the gastrointestinal flora in piglets during the first weeks of life. 1. The development of the gastrointestinal flora in naturally reared piglets]     

F Schulze 《Archiv fuer experimentelle veterinaermedizin》1978,32(1):155-170

Studies were conducted into the quantitative composition of the gastro-intestinal flora of 30 naturally raised piglets in four age groups. The gastro-intestinal tract was found to be "flooded" by Escherichia coli, Clostridium perfringens, micrococci, streptococci, proteus, and lactobacteria over the first hours after birth. Development of the intestinal flora was complete at the age of four days. The groups of germs recordable from naturally and artificially raised piglets were, basically, the same. Piglets, consequently, have no specific "lactoflora".  相似文献   

Feline arterial thromboembolism: an update.     

Stephanie A Smith  Anthony H Tobias 《Veterinary Clinics of North America: Small Animal Practice》2004,34(5):1245-1271

ATE remains a devastating complication of cardiac disease. Despite some improvements in our understanding of the underlying causes and clinical features of this disease, short-term management remains a challenge, and mortality is high. Long-term mortality is primarily attributable to the severe underlying cardiac disease. Many questions remain to be answered regarding the ideal management approach for feline ATE. The authors' preferred diagnostic and therapeutic approaches for these difficult patients are detailed in Box. 1.  相似文献   

Participatory mapping of landscape values in a Pan-European perspective     

Maria Garcia-Martin  Nora Fagerholm  Claudia Bieling  Dimitris Gounaridis  Thanasis Kizos  Anu Printsmann  Matthias Müller  Juraj Lieskovský  Tobias Plieninger 《Landscape Ecology》2017,32(11):2133-2150

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Is N‐feedback involved in the regulation of nitrogenase activity in Medicago truncatula?     

Saad Sulieman  Joachim Schulze  Karl H. Mühling  Lam-Son Phan Tran 《植物养料与土壤学杂志》2020,183(1):42-45

To determine whether senescing leaves provoke an active nitrogen (N) remobilization that results in the reduction of nitrogenase activity, 60% of Medicago truncatula lower leaves were either darkened or individually excised for two weeks. Although a considerable amount of N was remobilized, N₂ fixation activity was found to be increased to maintain the N source/sink balance, indicating an absence of the negative N‐feedback regulation of nitrogenase activity in the senescing M. truncatula.  相似文献   

Metabolic changes induced by oral glucose tests in horses and their diagnostic use     

Julien Delarocque  Florian Frers  Karsten Feige  Korinna Huber  Klaus Jung  Tobias Warnken 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2021,35(1):597-605

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Infection hazards and early therapy in bovine dystocia     

H Tillmann  J Schulze 《DTW. Deutsche tier?rztliche Wochenschrift》1974,81(23):594-598

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