Genetic map construction and quantitative trait locus (QTL) detection of growth-related traits in Litopenaeus vannamei for selective breeding applications.

Growth is a priority trait from the point of view of genetic improvement. Molecular markers linked to quantitative trait loci (QTL) have been regarded as useful for marker-assisted selection (MAS) in complex traits as growth. Using an intermediate F2 cross of slow and fast growth parents, a genetic linkage map of Pacific whiteleg shrimp, Litopenaeusvannamei, based on amplified fragment length polymorphisms (AFLP) and simple sequence repeats (SSR) markers was constructed. Meanwhile, QTL analysis was performed for growth-related traits. The linkage map consisted of 451 marker loci (429 AFLPs and 22 SSRs) which formed 49 linkage groups with an average marker space of 7.6 cM; they spanned a total length of 3627.6 cM, covering 79.50% of estimated genome size. 14 QTLs were identified for growth-related traits, including three QTLs for body weight (BW), total length (TL) and partial carapace length (PCL), two QTLs for body length (BL), one QTL for first abdominal segment depth (FASD), third abdominal segment depth (TASD) and first abdominal segment width (FASW), which explained 2.62 to 61.42% of phenotypic variation. Moreover, comparison of linkage maps between L. vannamei and Penaeusjaponicus was applied, providing a new insight into the genetic base of QTL affecting the growth-related traits. The new results will be useful for conducting MAS breeding schemes in L. vannamei

Les femmes dans la magistrature

Andriantahina Anne, Florenchie Anne-Rose, Lamboley Annie. Les femmes dans la magistrature. In: Diplômées, n°233, 2010. Les femmes dans la magistrature. pp. 67-73

Chapitre 10. Pédologie

avec la collaboration de Fernand Bourgeat, Michel Brossard, Jean Riquier, Patrice Roederer, Pierre Ségalen, Georges Serpantié, Michel Sourdat, Jacques Vieillefon, Jean-François Vizier © IRD/s. Bonvallot – Paysage de l'Itasy, petit cône volcanique avec cultures vivrières sur les versants. Introduction Le terme « pédologie » est créé en 1862, par Friedrich Albert Fallou, un juriste allemand passionné de science du sol (Feller et al., 2008). Selon Asio (2005), Fallou aurait déjà développé la n..

Direct seeding mulch based cropping systems (DMC) as a means to improve the economy of small scale farmers in Madagascar [Abstract]

International audienc

Putative QTLs for growth-related traits in <i>L</i><i>. vannamei</i>.

<p>QTLs, Quantitative trait loci.</p

New linkage map in <i>L</i><i>. vannamei</i> based on AFLP and SSR markers.

<p>Marker names are shown on the right and the adjacent marker spacing is displayed on the left in Kosambi centimorgans (cM). AFLP markers are in plain typeface and SSR markers are in bold.</p