2015 BGRI Poster Abstracts

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Displaying 411 - 415 of 415

Barberry plays a role in spreading inoculums to wheat fields to cause stripe rust in China

Wheat stripe rust, caused by basidiomycete fungus Puccinia striiformis f. sp. tritici (Pst), is a damaging disease worldwide. The recent discovery demonstrated the fungus depends on living wheat and aecial hosts, mainly barberry (Berberis) species, to complete its life cycle. In China, we determined that, under natural conditions, the sexual cycle of Pst occurs based on collections of Pst isolates from the diseased barberry in the past three years. However, no direct evidence to support...Read complete abstract

Primary Author: Zhao, College of Plant Protection, Northwest A&F University, China

Keywords: barberry, stripe rust

Status of wheat rust research and control in China

In China, wheat is grown on approximately 24 million hectares with an annual yield of 100 million tonnes. Stem rust, caused by Puccinia graminis f. sp. tritici, is a threat mainly to spring wheat in northeastern China. Leaf rust, caused by P. triticina, occurs on crops in the late growth stages in the Yellow-Huai-Hai River regions. Stripe rust, caused by P. striiformis f. sp. tritici (Pst), is destructive in all winter wheat regions and...Read complete abstract

Primary Author: Zhensheng Kang, College of Plant Protection, Northwest A&F University, P.R. China

Keywords:

Distribution resistance genes and strategies for sustainable control of wheat stripe rust in China

The appearance and spread of new Pst races are common consequences of the widespread use of single resistance genes in one or more widely grown cultivars, with epidemics occurring some time later. Based on the geographical situation in China, epidemiology of stripe rust can be divided into three major zones, namely autumn sources of inocula, spring sources of inocula, and the spring epidemic areas. About 67 stripe rust resistance genes (Yr1 Yr67) and some...Read complete abstract

Primary Author: Zhou, State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University, P.R. China

Keywords: China, stripe rust, resistance, control

Association mapping for validation of genomic regions influencing adult plant resistance to leaf rust in Australian barley breeding germplasm

Elite barley breeding lines from the Australian Northern Region Barley Breeding Program were evaluated at the seedling and adult growth stages for resistance to leaf rust (LR) caused by Puccinia hordei. F3:5 lines derived from parental germplasm of different geographic origins were screened in the glasshouse and field spanning four years of trials. The 2009 and 2011 breeding populations (BP1 and BP2) comprised 360 lines and were genotyped with 3,244 polymorphic diversity arrays technology (...Read complete abstract

Primary Author: Ziems, The University of Queensland, Queensland Alliance for Agriculture and Food Innovation, Australia

Keywords: Australia, barley, leaf rust, association mapping, APR

Breeding strategies to decrease stripe rust epidemics in Uzbekistan

Winter wheat production in Uzbekistan is threatened by yellow rust and leaf rust. Both rusts are capable of causing substantial economic losses, but their incidence varies due to different ecological requirements. Yellow rust caused significant yield losses in 2009, 2010, 2013, and in some regions, also in 2014. Several stripe rust resistant lines with high grain yield and desirable agronomic characteristics are being introduced through the International Winter Wheat Improvement Program (...Read complete abstract

Primary Author: Ziyaev, Kashkadarya Branch of the Grain and Leguminous Research Institute, Uzbekistan

Keywords: Uzbekistan, stripe rust

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