Research Article

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In the silkworm (Bombyx mori), resistance to the Zhenjiang (China) strain of the densonucleosis virus (DNV-Z) is controlled by the recessive gene nsd-Z (non-susceptible to DNV-Z), which is linked to 7 simple-sequence repeat markers. Marker-assisted evaluation and selection of DNV-Z-resistant silkworms were used for predicting DNV-resistance in backcrossed animals. A ... more

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Fatty acid desaturases exist in all living organisms and play important roles in many different biologic processes, such as fatty acid metabolism, lipid biosynthetic processes, and pheromone biosynthetic processes. Using the available silkworm genome sequence, we identified 14 candidate fatty acid desaturase genes. Eleven genes contain 3 conserved histidine cluster motifs and 4 ... more

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Leptin; obese gene; Polymerase chain reaction; Quantitative trait loci; Restriction fragment length polymorphism

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A.C.P. Silveira; R.C. Antunes; J.F. Almeida; T.F. Braga; P.F.A. Freitas; A.S.M. César; A.S.M. César; E.C. Guimarães
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Advanced backcross families derived from Oryza sativa cv MR219/O. rufipogon IRGC105491 were utilized for identification of quantitative trait loci (QTL) for blast resistance using simple sequence repeat markers. Two hundred and sixty-one BC2F3 families were used to construct a linkage map, using 87 markers, which covered 2375.2 cM of 12 rice ... more

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Abdominal fat traits; Body weight; Chicken; Microsatellite marker; NEAURP; Quantitative trait loci

Body weight and abdominal fat traits in meat-type chickens are complex and economically important factors. Our objective was to identify quantitative trait loci (QTL) responsible for body weight and abdominal fat traits in broiler chickens. The Northeast Agricultural University Resource Population (NEAURP) is a cross between broiler sires and Baier layer dams. We measured body weight and ... more

S.Z. Wang; X.X. Hu; Z.P. Wang; X.C. Li; Q.G. Wang; Y.X. Wang; Z.Q. Tang; H. Li
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Percentage of grain with chalkiness; Quantitative trait loci; Recombinant inbred line population; Rice

Appearance quality of rice grains is a major problem for rice production in many areas of the world. We conducted a molecular marker-based genetic analysis of percentage of grains with chalkiness (PGWC), which is a determining factor for appearance quality; it strongly affects milling, eating and cooking quality. An F8 recombinant inbred line population, which consists of 261 ... more

X. Liu; Y. Wang; S.W. Wang
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Bolting trait; Brassica rapa; Linkage mapping; Quantitative trait loci

Premature bolting can occur occasionally during spring cultivation of heading Chinese cabbage in East Asia when the plants encounter low temperatures (vernalization), leading to economic loss. Breeding bolting-resistant cultivars is the best choice for solving this problem. We looked for QTLs responsible for varietal differences in the bolting trait in Brassica rapa under ... more

Y.G. Wang; L. Zhang; X.H. Ji; J.F. Yan; Y.T. Liu; X.X. Lv; H. Feng

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