Interspecific crossing between blue‐tailed damselflies Ischnura elegans and I. senegalensis in the laboratory

2020 ◽  
Vol 23 (2) ◽  
pp. 165-172 ◽  
Author(s):  
Genta Okude ◽  
Takema Fukatsu ◽  
Ryo Futahashi
Keyword(s):  
Ischnura Elegans ◽  
Interspecific Crossing

scholarly journals Different stress from parasites and mate choice in two female morphs of the blue-tailed damselfly

2021 ◽  
Author(s):  
Erica Subrero ◽  
Irene Pellegrino ◽  
Marco Cucco
Keyword(s):  
Mating Behaviour ◽  
Adult Males ◽  
Similar Frequency ◽  
Male Preference ◽  
Ischnura Elegans ◽  
Emergence Success ◽  
The Common ◽  
Nw Italy ◽  
Whole Life Cycle ◽  
Pairing Behaviour

AbstractIn Odonates, female colour polymorphism is common and implies the presence of two or more female types with different colours and behaviours. To explain this phenomenon, several hypotheses have been proposed that consider morph frequency, population density, the presence of parasites, and mating behaviour. We studied the blue-tailed damselfly Ischnura elegans, a species with a blue androchrome morph and two gynochrome morphs (the common green infuscans, and the rare orange rufescens-obsoleta). The size of adult males and females, the presence of parasites, and pairing behaviour between males and the three female morphs was assessed in field conditions throughout the reproductive season in NW Italy. Moreover, growth and emergence success of larvae produced by the different morphs was analyzed in standardized conditions. In the field, males showed a preference for the gynochrome infuscans females, despite a similar frequency of androchrome females. In test conditions, male preference for the infuscans females was also observed. Paired males and paired androchrome females were larger than unpaired individuals, while there were no differences in size between paired and unpaired infuscans females. Males and androchrome females were more parasitized than infuscans females. The survival and emergence success of larvae produced by androchrome females was higher than those of offspring produced by the infuscans females. Our results suggest that a higher survival of progeny at the larval stage could counterbalance the higher parasitism and the lower pairing success of andromorph adult females and highlight the importance of considering the whole life-cycle in polymorphism studies.

scholarly journals Acylsugars in tomato leaflets confer resistance to the South American tomato pinworm, Tuta absoluta Meyr

2006 ◽  
Vol 63 (1) ◽  
pp. 20-25 ◽  
Author(s):  
Juliano Tadeu Vilela de Resende ◽  
Wilson Roberto Maluf ◽  
Marcos Ventura Faria ◽  
Alessandra Zawadzki Pfann ◽  
Ildon Rodrigues do Nascimento
Keyword(s):  
Tuta Absoluta ◽  
Wild Accession ◽  
South American ◽  
Resistance Level ◽  
Plant Damage ◽  
F2 Population ◽  
South American Tomato Pinworm ◽  
Lesion Type ◽  
Parental Lines ◽  
Interspecific Crossing

Acylsugars present in the accession 'LA716' of Lycopersicon pennellii play an important role in the resistance to Tuta absoluta. This paper investigates the possible association between the resistance to T. absoluta and the acylsugar contents in F2 and F2BC1 tomato plants derived from the interspecific crossing between L. esculentum 'TOM-584' and L. pennellii 'LA716'. From the F2 population, four high acylsugars and one low acylsugars plants were selected and tested for Tuta absoluta resistance along with parental lines TOM-584 and LA-716, and with the checks TOM-600 (high 2-tridecanone line with resistance to T. absoluta) and TOM-556 (low acylsugar line). The genotypes were tested under natural field infestation and were evaluated for overall plant damage, leaflet lesion type and percent of attacked leaflet. Four plants from F2BC1 [=(Lycopersicon esculentum 'TOM-584' <FONT FACE=Symbol>´</FONT> F2)] were selected for high acylsugars and two for low acylsugars, and tested in greenhouse cages infested with T. absoluta. These genotypes were evaluated with the parental lines and the checks for oviposition ten days after infestation, and for leaflet lesion type and overall plant damage at four different dates. The F2 genotypes BPX-370Bpl#25, BPX-370Bpl#30 and BPX-370Bpl#79, the F2BC1 genotypes BPX-370B pl#30-380 and BPX-370B pl#30-271 and the wild accession LA716 had good levels of resistance to Tuta absoluta. The resistance level increased with longer exposition time to the acylsugars, both in the field and in the cage tests. Acylsugar contents seemed to be highly and negatively correlated with the traits related to the pinworm resistance.

Male choice for female colour morphs in Ischnura elegans (Odonata, Coenagrionidae): testing the hypotheses

1999 ◽  
Vol 57 (6) ◽  
pp. 1229-1232 ◽  
Author(s):  
HANS VAN GOSSUM ◽  
ROBBY STOKS ◽  
ERIK MATTHYSEN ◽  
FAMKE VALCK ◽  
LUC DE BRUYN
Keyword(s):  
Male Choice ◽  
Ischnura Elegans ◽  
Colour Morphs

scholarly journals Short read sequencing assembly revealed the complete mitochondrial genome of Ischnura elegans Vander Linden, 1820 (Odonata: Zygoptera)

2016 ◽  
Vol 1 (1) ◽  
pp. 574-576 ◽  
Author(s):  
Wiebke Feindt ◽  
Rebecca Herzog ◽  
Hans-Jürgen Osigus ◽  
Bernd Schierwater ◽  
Heike Hadrys
Keyword(s):  
Mitochondrial Genome ◽  
Complete Mitochondrial Genome ◽  
Short Read ◽  
Short Read Sequencing ◽  
Ischnura Elegans

scholarly journals Mark-recapture estimates of daily survival rates of two damselflies (Coenagrion puella and Ischnura elegans)

2001 ◽  
Vol 79 (5) ◽  
pp. 895-899 ◽  
Author(s):  
Bradley R. Anholt ◽  
Christoph Vorburger ◽  
Peter Knaus
Keyword(s):  
Survival Rates ◽  
Mark Recapture ◽  
Ischnura Elegans ◽  
Daily Survival
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