Research Article

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11/03/2010
Ear weight; Maize (Zea mays L.); Nitrogen regime; quantitative trait locus; Recombinant inbred line

Ear weight is one of the most important agronomic traits considered necessary in maize (Zea mays L.) breeding projects. To determine its genetic basis, a population consisting of 239 recombinant inbred lines, derived from the cross Mo17 x Huangzao4, was used to detect quantitative trait loci (QTLs) for ear weight under two nitrogen regimes. Under a high nitrogen fertilization ... more

X.H. Liu; Z.P. Zheng; Z.B. Tan; Z. Li; C. He
04/03/2012
Days to silking; Maize (Zea mays L.); Nitrogen regime; quantitative trait locus; Recombinant inbred line

Days to silking (DTS) is one of the most important traits in maize (Zea mays). To investigate its genetic basis, a recombinant inbred line population was subjected to high and low nitrogen (N) regimes to detect quantitative trait loci (QTLs) associated with DTS. Three QTLs were identified under the high N regime; these explained 25.4% of the phenotypic variance. Due to additive ... more

Z.P. Zheng; X.H. Liu; Y.B. Huang; X. Wu; C. He; Z. Li
01/21/2014
Ear height; Maize (Zea mays L.); quantitative trait locus; Recombinant inbred line

Maize (Zea mays L.) is among the crops with the greatest worldwide economic importance. Ear height is a very important trait that is considered necessary in maize and is related to morphology, lodging, and yield. To realize its genetic basis, an F9 recombinant inbred line population and a genetic map consisting of 101 simple sequence repeat markers were used to detect ... more

Z.Q. Li; H.M. Zhang; X.P. Wu; Y. Sun; X.H. Liu
03/06/2015
quantitative trait locus; Rice (Oryza sativa L.); ShB-resistant cultivars; Sheath blight (ShB)

Rice sheath blight (ShB), which is caused by Rhizoctonia solani, has become the most serious rice disease in China. Yangdao 4, a cultivar with partial resistance to ShB, was crossed with Lemont, a susceptible cultivar, to develop mapping populations that were used to analyze quantitative trait loci (QTL) that confer resistance to ShB. QTL analysis were performed in 3 environments ... more

Z.H. Wen; Y.X. Zeng; Z.J. Ji; C.D. Yang
10/21/2008
Bos indicus; Bos taurus; DNA marker; marker-assisted selection; Microsatellite; Nelore

The aim of the present article was to study the population structure and genetic diversity of Nelore cattle and genetic relationships between Nelore and different taurine and zebu breeds raised in Brazil. DNA polymorphism analysis was carried out with 1976 animals of 16 zebu, taurine and synthetic breeds raised in Brazil. A higher genetic differentiation was observed in taurine than in zebu ... more

M.A.C. Dani; M.B. Heinneman; S.U. Dani
10/30/2013
Bayesian inference; marker-assisted selection; Molecular breeding value

The availability of molecular marker information has turned out to be an opportunity to improve animal breeding programs, by the inclusion of those effects in the estimation of breeding values. Along this perspective, the aims of present research were to compare genetic evaluation models that assume or not marker effects in the estimation of breeding values, as well as to estimate the ... more

F.M. Rezende
10/18/2013
marker-assisted selection; Psathyrostachys huashanica; RAPD; Repetitive sequence; SCAR; Wheat

In this study, we cloned and sequenced a 938-base pair polymorphic band, pHs27, in the tightly linked random amplified polymorphic DNA marker OPU10 and converted it into a sequence-characterized amplified region (SCAR) marker referred to as RHS141, which was specific for the Ns genome of Psathyrostachys huashanica. A GenBank basic local alignment search tool search showed that ... more

W.L. Du; J. Wang; L.M. Wang; Y.H. Pang; J. Wu; J.X. Zhao; Q.H. Yang; X.H. Chen
08/12/2013
Bos indicus; marker-assisted selection; Molecular breeding value; Protein turnover; Residual feed intake

We looked for possible associations of SNPs in genes related to protein turnover, with growth, feed efficiency and carcass traits in feedlot Nellore cattle. Purebred Nellore bulls and steers (N = 290; 378 ± 42 kg body weight, 23 months ± 42 days old) were evaluated for daily feed intake, body weight gain (BWG), gross feed efficiency, feed conversion ratio, partial efficiency of growth, ... more

R.C. Gomes; S.L. Silva; M.E. Carvalho; F.M. Rezende; L.F.B. Pinto; M.H.A. Santana; T.R. Stella; F.V. Meirelles; R. Júnior; P.R. Leme; J.B.S. Ferraz
06/29/2012
Bos indicus; Growth and fat accrual; Growth hormone gene; marker-assisted selection; Promoter region; Somatotropic axis

A synergistic effect in the somatotropic axis (GH1-GHR-IGF1) was observed in 736 young Nelore (Bos indicus) bulls under ad libitum grass feeding conditions on irrigated pasture in central Brazil. Stepwise substitution of shorter alleles of the promoter region of the growth hormone gene (GH1) and the P1 promoter of the GH1 receptor gene (GHR ... more

M.A. Dani; M. von Cube; I.L. Freire; L. Suguisawa; C. Fischer; S.U. Dani
04/17/2014
Hordeum vulgare; Internode length; marker-assisted selection; Quantitative trait loci

Yield losses caused by lodging in barley can be partially controlled by reducing plant height. In order to understand dwarfing mechanisms and efficiently use new dwarf germplasms for a breeding program, it is important to identify QTL of plant height components. QTL analysis was performed for seven plant height component traits using a DH population of 122 lines derived from the cross of ... more

X.F. Ren; D.F. Sun; W.B. Dong; G.L. Sun; C.D. Li

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