scholarly journals Comparative phylogeographic analysis of Cuscuta campestris and Cuscuta reflexa in Kenya: Implications for management of highly invasive vines

2021 ◽  
Author(s):  
Joel Masanga ◽  
Richard Oduor ◽  
Amos Alakonya ◽  
Mathew Ngugi ◽  
Patroba Ojola ◽  
...  
Plants ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 738
Author(s):  
Eva María Córdoba ◽  
Mónica Fernández-Aparicio ◽  
Clara Isabel González-Verdejo ◽  
Carmela López-Grau ◽  
María del Valle Muñoz-Muñoz ◽  
...  

The dodders (Cuscuta spp.) are parasitic plants that feed on the stems of their host plants. Cuscuta campestris is one of the most damaging parasitic plants for the worldwide agricultural production of broad-leaved crops. Its control is limited or non-existent, therefore resistance breeding is the best alternative both economically and environmentally. Common vetch (Vicia sativa) and bitter vetch (Vicia ervilia) are highly susceptible to C. campestris, but no resistant genotypes have been identified. Thus, the aim of this study was to identify in V. sativa and V.ervilia germplasm collections genotypes resistant to C. campestris infection for use in combating this parasitic plant. Three greenhouse screening were conducted to: (1) identify resistant responses in a collection of 154 accessions of bitter vetch and a collection of 135 accessions of common vetch genotypes against infection of C. campestris; (2) confirm the resistant response identified in common vetch accessions; and (3) characterize the effect of C. campestris infection on biomass of V. sativa resistant and susceptible accessions. Most common vetch and bitter vetch genotypes tested were susceptible to C. campestris. However, the V. sativa genotype Vs.1 exhibited high resistance. The resistant phenotype was characterized by a delay in the development of C. campestris posthaustorial growth and a darkening resembling a hypersensitive-like response at the penetration site. The resistant mechanism was effective in limiting the growth of C. campestris as the ratio of parasite/host shoot dry biomass was more significantly reduced than the rest of the accessions. To the best or our knowledge, this is the first identification of Cuscuta resistance in V. sativa genotypes.


Viruses ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 1045
Author(s):  
Hyuk-Chae Lee ◽  
Sol Jeong ◽  
Andrew Y. Cho ◽  
Kyu-Jik Kim ◽  
Jun-Young Kim ◽  
...  

Infectious bronchitis virus (IBV) was first identified in the 1930s and it imposes a major economic burden on the poultry industry. In particular, GI-19 lineage has spread globally and has evolved constantly since it was first detected in China. In this study, we analyzed S1 gene sequences from 60 IBVs isolated in South Korea. Two IBV lineages, GI-15 and GI-19, were identified in South Korea. Phylogenetic analysis suggested that there were six distinct subgroups (KM91-like, K40/09-like, and QX-like I to IV) of the South Korean GI-19 IBVs. Among them, QX-type III and IV subgroups, which are phylogenetically different from those reported in South Korea in the past, accounted for more than half of the total. Moreover, the phylogeographic analysis of the QX-like subgroups indicated at least four distinct introductions of GI-19 IBVs into South Korea during 2001–2020. The efficacy of commercialized vaccines against the recently introduced QX-like subgroups should be verified, and continuous international surveillance efforts and quarantine procedures should be enhanced to prevent the incursion of viruses.


2021 ◽  
pp. 114597
Author(s):  
Shobhit Mishra ◽  
Fahad Saad Alhodieb ◽  
Md Abul Barkat ◽  
Mohd Zaheen Hassan ◽  
Harshita Abul Barkat ◽  
...  

1985 ◽  
Vol 63 (3) ◽  
pp. 315-321 ◽  
Author(s):  
Shobha Sharma ◽  
Raj Khanna ◽  
G. G. Sanwal
Keyword(s):  

2005 ◽  
Vol 37 (1) ◽  
pp. 202-213 ◽  
Author(s):  
Jinzhong Fu ◽  
Cameron J. Weadick ◽  
Xiaomao Zeng ◽  
Yuezhao Wang ◽  
Zhijun Liu ◽  
...  

2012 ◽  
Vol 2 (3) ◽  
pp. S1303-S1307 ◽  
Author(s):  
Pavan Bhausaheb Udavant ◽  
Suggala Venkata Satyanarayana ◽  
Chandrashekhar Devidas Upasani

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