A. A. Cowan
Aberystwyth University
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by A. A. Cowan.
Sexual Plant Reproduction | 2000
A. A. Cowan; Athole H. Marshall; Terry P. T. Michaelson-Yeates
Abstract The effect of competition between incompatible and compatible pollen grains on the seed production of white clover was studied. Stigmatic receptivity was also studied. A selection line of white clover that has red leaves was used as a pollen donor and as a genetic marker to allow determination of the pollen donor responsible for ovule fertilisation. Results show that incompatible pollen did not inhibit compatible pollen grains from fertilising ovules and producing seeds, although it did slightly impair seed yield. At temperatures of 20/10°C (day/night) stigmas of white clover remained receptive to additional pollination up to 32 h after an initial compatible pollination and 40 h after an incompatible pollination. The results imply that factors other than inadequate pollination and the self-incompatibility system are responsible for failure of white clover to attain its potential seed yield.
Frontiers in Microbiology | 2017
Toby J. Wilkinson; A. A. Cowan; Hannah Vallin; L. A. Onime; Linda Boniface Oyama; Simon J. S. Cameron; Charlotte Gonot; J. M. Moorby; Kate Waddams; Vincent Theobald; David Leemans; S. Bowra; C. Nixey; Sharon A. Huws
The turkey microbiome is largely understudied, despite its relationship with bird health and growth, and the prevalence of human pathogens such as Campylobacter spp. In this study we investigated the microbiome within the small intestine (SI), caeca (C), large intestine (LI), and cloaca (CL) of turkeys at 6, 10, and 16 weeks of age. Eight turkeys were dissected within each age category and the contents of the SI, C, LI, and CL were harvested. 16S rDNA based QPCR was performed on all samples and samples for the four locations within three birds/age group were sequenced using ion torrent-based sequencing of the 16S rDNA. Sequencing data showed on a genus level, an abundance of Lactobacillus, Streptococcus, and Clostridium XI (38.2, 28.1, and 13.0% respectively) irrespective of location and age. The caeca exhibited the greatest microbiome diversity throughout the development of the turkey. PICRUSt data predicted an array of bacterial function, with most differences being apparent in the caeca of the turkeys as they matured. QPCR revealed that the caeca within 10 week old birds, contained the most Campylobacter spp. Understanding the microbial ecology of the turkey gastrointestinal tract is essential in terms of understanding production efficiency and in order to develop novel strategies for targeting Campylobacter spp.
Crop Science | 1996
Christine Belaygue; Jacques Wery; A. A. Cowan; François Tardieu
Crop Science | 2002
Christine Bissuel-Belaygue; A. A. Cowan; Athole H. Marshall; Jacques Wery
Crop Science | 2002
Christine Bissuel-Belaygue; A. A. Cowan; Athole H. Marshall; Jacques Wery
Crop Science | 2002
Christine Bissuel-Belaygue; A. A. Cowan; Athole H. Marshall; Jacques Wery
Crop Science | 2002
Christine Bissuel-Belaygue; A. A. Cowan; Athole H. Marshall; Jacques Wery
Journal of Cereal Science | 2017
Andrew Chappell; Karen P. Scott; Irene Griffiths; A. A. Cowan; Cathy Hawes; John Wishart; Peter Martin
Archive | 2004
Catherine J. Howarth; Tim Langdon; A. A. Cowan; Mike Leggett; John Valentine
Oats (Second Edition)#R##N#Chemistry and Technology | 2011
John Valentine; A. A. Cowan; Athole H. Marshall