Selection for rate of development and pupal weight in ‘Cnephasia’ jactatana: A genetic tool for quality improvement
- 1 January 1990
- journal article
- research article
- Published by Wiley in Entomologia Experimentalis et Applicata
- Vol. 54 (1) , 1-8
- https://doi.org/10.1111/j.1570-7458.1990.tb01305.x
Abstract
Selection for fast and slow rate of pupation over three successive generations in ‘Cnephasia’ jactatana (Walker) (Lepidoptera: Tortricidae) produced a ‘fast strain’ that pupated 2 days earlier than the ‘slow strain’. Selection for pupal weight was asymmetrical with the ‘light’ selection having more effect than the ‘heavy’ selection. The larval critical weight (LCW), the larval maximum weight (LMW) and the latent feeding period were not affected by any of the selections. ‘Slow’ and ‘light’ selections resulted in longer pre‐pupal periods than ‘fast’, ‘heavy’ or the laboratory population. Fecundity was reduced in females from ‘slow’ and ‘light’ selections. Selection in insects is discussed as a possible genetic tool for overall quality improvement.Résumé: La sélection de la vitesse de développement et du poids des chrysalides de ‘Cnephasia jactatana’: outil génétique pour l'amélioration des caractéristiquesLa sélection pour la rapidité d'apparition des chrysalides de C. jactatana Walker produit en 3 générations une lignée ‘rapide’ qui se nymphose 2 jours avant la ‘lente’. La sélection pour le poids des chrysalides est asymétrique, ayant plus d'effet sur la sélection développement lent que sur la sélection développement rapide. Le poids critique larvaire (LCW), le poids larvaire maximal (LMW) et la période latente d'alimentation ne sont pas modifiés par ces sélections. Les lignées ‘lente’ et ‘légère’ ont des périodes prénymphales plus longues que les lignées ‘rapide’ et ‘lourde’, ou la souche de laboratoire. Les fécondités des lignées ‘lente’ et ‘légère’ sont réduites. Les sélections associées des insectes sont examinées comme outil génétique potentiel permettant d'améliorer les performances globales.Keywords
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