Genetic variability among native and introduced strains of the parasitic nematode Deladenus siricidicola

2020 ◽  
Vol 173 ◽  
pp. 107385
Author(s):  
E. Erin Morris ◽  
Patrick O'Grady ◽  
György Csóka ◽  
Ann E. Hajek
Plant Disease ◽  
2016 ◽  
Vol 100 (1) ◽  
pp. 149-153 ◽  
Author(s):  
Claudia M. Holguin ◽  
Xinyuan Ma ◽  
John D. Mueller ◽  
Paula Agudelo

Hoplolaimus columbus is an important nematode pest of soybean in South Carolina and North Carolina. Tolerant cultivars are available for the management of this plant-parasitic nematode; however, variation in the response of soybean cultivars to H. columbus populations has been observed. This variation may be due to the presence of different species or high genetic diversity of H. columbus populations. The objective of this study was to identify the Hoplolaimus spp. present in fields representing the main soybean-growing regions in South Carolina and North Carolina and to examine the genetic variability of these populations. In South Carolina, the only species found associated with soybean was H. columbus but, in North Carolina, H. stephanus was the dominant species. The two species were never found together. Genetic variability analyses of a mitochondrial and a nuclear marker showed that only one haplotype was shared by the H. columbus populations. H. stephanus showed higher genetic variability, with private haplotypes per sampling location. Knowledge of the distribution and genetic variability of these two Hoplolaimus spp. is valuable to growers to determine potentially damaging infestations of these plant-parasitic nematodes in soybean fields.


PLoS ONE ◽  
2018 ◽  
Vol 13 (11) ◽  
pp. e0207529
Author(s):  
Miguel Castillo ◽  
Eugenio Sanfuentes ◽  
Andrés Angulo ◽  
Jose Becerra ◽  
Jesús L. Romero-Romero ◽  
...  

2001 ◽  
Vol 21 (6) ◽  
pp. 580-592 ◽  
Author(s):  
Arnold Boonstra ◽  
Dick de Zeeuw ◽  
Paul E. de Jong ◽  
Gerjan Navis

2013 ◽  
Vol 44 (02) ◽  
Author(s):  
H Trippe ◽  
S Lutz ◽  
A Della Marina ◽  
U Hehr ◽  
W Kress ◽  
...  
Keyword(s):  

2017 ◽  
Vol 23 (1) ◽  
Author(s):  
R.A. PATIL ◽  
S.G. BHARAD ◽  
S.N. SAWANT

Assessment of genetic diversity in the available germplasm is the prerequisite for development of improved genotypes through planned breeding programmes. In the view of this Forty-eight genotypes of seedling origin guava along with 1 check (L-49/Sardar) collected and conserved at germplasm block, Main Garden, Department of Horticulture, Dr. P. D. A. University, Akola were evaluated for genetic variability and diversity based on the qualitative characteristics. The genotypes were evaluated for sixteen morphological traitsviz. tree, leaf, floral and fruit traits. Results Show considerable extent of variability amongst the 49 genotypes in each traits. A sizeable amount of intrapopulation diversity recorded can be used to identify diverse parents which can be utilized in hybridization programmes.


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