scholarly journals Response of Soybean Accessions from Provinces in Southern China to Phytophthora sojae

Plant Disease ◽  
1998 ◽  
Vol 82 (5) ◽  
pp. 555-559 ◽  
Author(s):  
D. E. Kyle ◽  
C. D. Nickell ◽  
R. L. Nelson ◽  
W. L. Pedersen
Keyword(s):  
Glycine Max ◽  
Resistance Genes ◽  
Southern China ◽  
Phytophthora Sojae ◽  
Sources Of Resistance ◽  
Breeding Programs ◽  
Inoculation Technique ◽  
The World ◽  
Glycine Max L ◽  
Phytophthora Rot

Phytophthora rot, caused by Phytophthora sojae, is a damaging disease of soybean (Glycine max (L.) Merr.) throughout the soybean-producing regions of the world. The discovery of new sources of resistance in soybean is vital in maintaining control of Phytophthora rot, because races of the pathogen have been discovered that can attack cultivars with commonly used resistance genes. The objectives of this study were to investigate the distribution and diversity of Phytophthora-resistant soybean in southern China and identify sources that confer resistance to multiple races for implementation into breeding programs. Soybean accessions obtained from southern China were evaluated for their response to races 1, 3, 4, 5, 7, 10, 12, 17, 20, and 25 of P. sojae using the hypocotyl inoculation technique in the greenhouse at Urbana, Illinois in 1996 and 1997. Accessions were identified that confer resistant responses to multiple races of the pathogen. These accessions may provide sources of resistance for control of Phytophthora rot of soybean in the future. The majority of the accessions with resistance to eight or more of the ten races tested were from the provinces of Hubei, Jiangsu, and Sichuan in southern China. Based on the evaluated accessions, these provinces appear to be valuable sources of Phytophthora-resistant soybean.

Common Phytophthora sojae pathotypes occurring in South Dakota

2021 ◽  
Author(s):  
Rawnaq Chowdhury ◽  
Connie Tande ◽  
Emmanuel Z Byamukama
Keyword(s):  
Glycine Max ◽  
South Dakota ◽  
Resistance Genes ◽  
Phytophthora Sojae ◽  
Stem Rot ◽  
Inoculation Technique ◽  
Glycine Max L ◽  
Rps Gene ◽  
Important Disease

Phytophthora root and stem rot, caused by Phytophthora sojae, is an important disease of soybean (Glycine max L.) in South Dakota. Because P. sojae populations are highly diverse and resistance genes deployed in commercial soybean varieties often fail to manage the disease, this study was initiated to determine P. sojae pathotype distribution in South Dakota. A total of 216 P. sojae isolates were baited from soil collected from 422 soybean fields in South Dakota in 2013-2015 and 2017. The pathotype of each isolate was determined by inoculating 10 seedlings of 13 standard soybean P. sojae differential lines using the hypocotyl inoculation technique. Of the 216 pathotyped isolates, 48 unique pathotypes were identified. The virulence complexity of isolates ranged from virulence on one Rps gene (Rps7) to virulence on 13 Rps genes and mean complexity was 5.2. Harosoy (Rps7), Harlon (Rps1a), Williams 79 (Rps 1c), William 82 (Rps1k), Harosoy 13XX (Rps1b), were susceptible to 98, 80, 78, 73, 72% of the isolates, respectively. These results highlight the highly diverse P. sojae pathotypes in South Dakota and the likely Rps genes to fail in commercial soybean varieties

scholarly journals Evaluation of genetic diversity in 19 Glycine max (L.) Merr. accessions included in the Czech National Collection of soybean genotypes

2012 ◽  
Vol 38 (No. 2) ◽  
pp. 69-74 ◽  
Author(s):  
M. Baránek ◽  
M. Kadlec ◽  
J. Raddová ◽  
M. Vachůn ◽  
M. Pidra
Keyword(s):  
Genetic Diversity ◽  
Glycine Max ◽  
Random Amplified Polymorphic Dna ◽  
Breeding Programs ◽  
Low Level ◽  
Low Degree ◽  
Soybean Genotypes ◽  
Glycine Max L ◽  
Rapd Polymorphism ◽  
Selection Of

The random amplified polymorphic DNA (RAPD) technique was used to evaluate both genetic diversity among 19 soybean accessions included in the Czech National Collection of Soybean Genotypes and their potential as a new source of genetic variations for soybean breeding programs. Only 22 of all the 40 random primers used in RAPD reactions showed polymorphism acceptable for an effective characterisation of these accessions. Altogether 122 highly reproducible RAPD fragments were generated, 55 of them were polymorphic (46%). However, because of the previously observed low degree of RAPD polymorphism in the case of Glycine max, fragments with low level of informativeness were evaluated, too. Presented results enable the selection of genetically distinct individuals. Such information may be useful to breeders willing to use genetically diverse introductions in soybean improvement process. 

scholarly journals Races of Phytophthora sojae and Their Virulences on Soybean Cultivars in Heilongjiang, China

Plant Disease ◽  
2010 ◽  
Vol 94 (1) ◽  
pp. 87-91 ◽  
Author(s):  
Shuzhen Zhang ◽  
Pengfei Xu ◽  
Junjiang Wu ◽  
Allen G. Xue ◽  
Jinxiu Zhang ◽  
...  
Keyword(s):  
Phytophthora Sojae ◽  
Heilongjiang Province ◽  
Plant Mortality ◽  
Pathogen Population ◽  
Sources Of Resistance ◽  
Breeding Programs ◽  
Soybean Cultivars ◽  
Rps Gene ◽  
First Time ◽  
Important Disease

Phytophthora root and stem rot, caused by Phytophthora sojae, is an economically important disease of soybean (Glycine max) in Heilongjiang Province, China. The objectives of this research were to determine the race profile of P. sojae in Heilongjiang and evaluate soybean cultivars for reactions to the pathogen races. A total of 96 single-zoospore P. sojae isolates were obtained from soil samples collected from 35 soybean fields in 18 counties in Heilongjiang from 2005 to 2007. Eight races of P. sojae, including races 1, 3, 4, 5, 9, 13, 44, and 54, were identified on a set of eight differentials, each containing a single resistance Rps gene, from 80 of the 96 isolates. Races 1 and 3 were predominant races, comprising 58 and 14 isolates, and representing 60 and 7% of the pathogen population, respectively. Races 4, 5, 44, and 54 were identified for the first time in Heilongjiang, and each was represented by two to three isolates only. Sixty-two soybean cultivars commonly grown in Heilongjiang Province were evaluated for their resistance to the eight P. sojae races identified using the hypocotyl inoculation technique. Based on the percentage of plant mortality rated 5 days after inoculation, 44 cultivars were resistant (<30% mortality) to at least one race. These cultivars may be used as sources of resistance in soybean breeding programs.

Association mapping for partial resistance to Phytophthora sojae in soybean (Glycine max (L.) Merr.)

2014 ◽  
Vol 93 (2) ◽  
pp. 355-363 ◽  
Author(s):  
JUTAO SUN ◽  
NA GUO ◽  
JUN LEI ◽  
LIHONG LI ◽  
GUANJUN HU ◽  
...  
Keyword(s):  
Glycine Max ◽  
Association Mapping ◽  
Partial Resistance ◽  
Phytophthora Sojae ◽  
Glycine Max L

KG 41 SOYBEAN

1990 ◽  
Vol 70 (2) ◽  
pp. 537-538
Author(s):  
N. R. BRADNER ◽  
R. D. SIMPSON ◽  
A. A. HADLOCK
Keyword(s):  
Glycine Max ◽  
Maturity Group ◽  
Lodging Resistance ◽  
Yield Performance ◽  
Glycine Max L ◽  
Phytophthora Rot

KG 41 is a Maturity Group 00 soybean (Glycine max (L.) Merr.) cultivar which is 2 d earlier and higher yielding than the cultivar Bicentennial. Its main advantages are its yield performance, lodging resistance and phytophthora rot tolerance.Key words: Glycine max, KG 41 cultivar, soybean

scholarly journals GmDRR1, a dirigent protein resistant to Phytophthora sojae in Glycine max (L.) Merr.

2018 ◽  
Vol 17 (6) ◽  
pp. 1289-1298 ◽  
Author(s):  
Qing-shan CHEN ◽  
Guo-long YU ◽  
Jia-nan ZOU ◽  
Jing WANG ◽  
Hong-mei QIU ◽  
...  
Keyword(s):  
Glycine Max ◽  
Phytophthora Sojae ◽  
Dirigent Protein ◽  
Glycine Max L ◽  
Protein Resistant

Soybeans

1986 ◽  
Vol 15 (2) ◽  
pp. 75-79
Author(s):  
Robert W. Howell
Keyword(s):  
United States ◽  
Glycine Max ◽  
The United States ◽  
Soybean Production ◽  
The World ◽  
Glycine Max L ◽  
World Agriculture

The rapid increase in importance of soybeans (Glycine max (L.) Merr.) and soybean products in world agriculture is a major phenomenon of the last 50 years. Beginning about 1940 soybean production and use increased rapidly, first in the United States and recently in other parts of the world. Soybean production now ranks near the top of non-cereal sources of calories and protein.

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