Large White Butterfly, Pieris brassicae L. (LWB) is one of the greatest pests of cruciferous cultures in Estonia, and, in the years of its biggest abundance, it can destroy a significant part of a crop. Many plants contain natural compounds that can repel and/or attract insects and protect neighbouring plants. This principle is used in a method known as companion planting. The aim of this paper...

A quantitative trait locus (QTL) analysis of female reproductive data from a three-generation experimental cross between Meishan (MS) and Large White (LW) pig breeds is presented. Six F1 boars and 23 F1 sows, progeny of six LW boars and six MS sows, produced 573 F2 females and 530 F2 males. Six traits, i.e. teat number (TN), age at puberty (AP), ovulation rate (OR), weight at mating (WTM), numb...

Virtually all studies of plant-herbivore-natural enemy interactions focus on plant quality as the major constraint on development and survival. However, for many gregarious feeding insect herbivores that feed on small or ephemeral plants, the quantity of resources is much more limiting, yet this area has received virtually no attention. Here, in both lab and semi-field experiments using tents c...

The objective of this study was to evaluate the genetic parameters of thermoregulation traits and its association with sow’s performance during lactation. A total of 94 lactating Large White (LW) sows, rearing in a tropical humid climate were used in this experiment. The genetic parameters of rectal temperature measured at 0700 and 1200 (RT7 and RT12), the difference between RT12 and RT7 (dRT),...

Piétrain (P), Large White (LW) and Belgian Landrace stress negative (BN) boars were slaughtered at 50, 70, 90 or 110 kg live weight to investigate breed differences and the effect of slaughter weight on boar taint prevalence. Boar taint was quantified by four different methodologies: sensory evaluation of neckfat heated with a hot iron in the slaughterhouse, sensory evaluation of meat by consum...

A total of 823 farrowing records representing five genetic groups of pigs Nigerian local pigs (NP), the Large White (LW), NP×LW, (NP×LW) ×LW, and (NP×LW) ×NP were used to investigate the effect of pig genotype on litter performance under the humid tropical conditions of Southwestern Nigeria. Past data records spanning a period of 12 years (1979 1990) were collected from the Swine Unit of the Un...

An experimental design aiming at analysing the consequences of genetic selection from 1977 to 1998-2000 on the evolution of stress-responsive systems in the French Large White (LW) and Landrace (LR) pig populations was conducted by INRA and IFIP-Institut du Porc. Large White sows were inseminated with semen from LW boars born in 1977 (frozen semen) or in 1998 and their second-generation offspri...