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Stigma characteristics are important factors affecting the seed yield of hybrid rice per unit area. Natural variation of stigma characteristics has been reported in rice, but the genetic basis for this variation is largely unknown. We performed a genome‐wide association study on three stigma characteristics in six environments using 1.3 million single‐nucleotide polymorphism (SNPs) characterized in...
The outcrossing traits in rice affect the yield of hybrid rice seed production. In this study, 30 quantitative trait loci (QTLs) were detected in a natural population composed of 522 accessions by using a mixed linear model for the four outcrossing-related traits in 2017 and 2018. We detected 3, 4, 9 and 14 QTLs for flag leaf length (FLL), flag leaf width (FLW), flag leaf angle (FLA) and panicle neck...
The acreage of submerged direct-sown cultivation of Oryza sativa is gradually increasing in China because of the constantly decreasing number of laborers in rural areas. Identifying favorable alleles for seedling anoxic tolerance (SAT) is necessary for improving cultivars suitable for submerged direct-sown rice cultivation. In this study, we used two populations to detect quantitative trait loci (QTLs)...
Improving the combining ability for grain quality traits of the parents is the key factor to enhance averaged bulk grain quality of hybrid japonica rice. Eight quality traits including brown rice rate, milled rice rate (MRR), head rice rate (HRR), chalkiness degree (CD), percentage of chalky grain (PCG), alkali spreading value (ASV), gel consistency (GC) and amylose content (AC) of the bulked sample...
Flag leaf angle (FLA) in rice (Oryza sativa L.) is one of the important traits affecting F1 seed production by mechanization. To elucidate the genetic mechanism of FLA and mine favorable marker alleles for F1 seed production in rice, we performed a genome-wide association study using phenotypic data over 2 years and genotypic data of 262 pairs of simple sequence repeat (SSR) markers collected from...
Main conclusion Fourteen new quantitative trait loci (QTLs) and ten favorable alleles were identified for lodging resistance traits in a natural population of rice. Parental combinations were designed to improve lodging resistance.Lodging is one of the most critical constraints to rice yield, and therefore, mining favorable alleles for lodging resistance traits is imperative for the advancement of...
China has commenced an electricity restructuring reform in 2014, with the announced aim of applying market competition to the power retailing sector. Although power system security and competitive market operation are contradictory, they could co-exist in harmony. This paper aims to find out an equilibrium mode between retail side commercial competition and reliable system operations. The equilibrium...
In this paper, an improved recursive least square (RLS) algorithm was proposed to estimate time-varying AR parameters in the presence of noise. Interharmonics signal can be modeled as a nonstationary auto-regressive (AR) model, the spectral estimation of interharmonics signal can be given by the estimated time-varying AR parameters. AR parametric spectral estimation methods have better frequency resolution...
Several studies have investigated the association between xeroderma pigmentosum group D (XPD) Lys751Gln polymorphism and oral cancer. However, the impact of XPD Lys751Gln polymorphism on oral cancer risk is unclear, owing to the obvious inconsistence among those studies. The aim of this study was to derive a more precise estimation of the association of XPD Lys751Gln polymorphism with oral cancer...
In this paper, a state estimation (SE) method with equality constraints is proposed for the power system. This method aims to construct a SE objective function combined with the constraints of zero-injection nodes and wide area measurement system (WAMS) in order to improve the precision of SE. The optimal estimation can be derived from the SE objective function with double constraints by the optimization...
As a new control strategy, auto-disturbance-rejection control (ADRC) has been introduced in the power system successfully. The controller is free of planting model foundation in the design procedure and realized simply. In this paper, a ADRC controller used for superconducting magnetic energy storage (SMES) unit connected to a power system is proposed. Purpose of designing such controller is to improve...
Owing to the network parameters may alter with the changing power grid operation and the remote information may also contain errors under some contingency, there could be parameter errors in the state estimation process. In order to provide a correct operation state with the state estimation, the parameter errors must be identified. Currently in the power system, there are two measurement passes,...
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