A Preliminary Study on SSR Molecular Markers of White Character of Capsicum

In this study,Paprika 247 with milk white fruit at marketable maturity stage as male parent and capsicum 246 with green fruit at marketable maturity stage as female parent were selected as experimental materials to screen SSR molecular markers closely related to white fruit character,so as to lay a foundation for the use of SSR technique for molecular marker-assisted breeding and provide reference for breeding of new white capsicum germplasms and varieties. 360 pairs of SSR primers were screened in total,and among them,3 pairs of primers（ ES-89,ES-292,ES-296） exhibited remarkable polymorphic differences. This study will provide a basis for next QTL mapping.

Penumbral imaging and numerical evaluation of large area source neutron imaging system

The fusion neutron penumbral imaging system Monte Carlo model was established. The transfer functions of the two discrete units in the neutron source were obtained in two situations:Imaging in geometrical near-optical and real situation. The spatial resolutions of the imaging system in two situations were evaluated and compared. The penumbral images of four units in the source were obtained by means of 2-dimensional (2D) convolution and Monte Carlo simulation. The penumbral images were reconstructed with the same method of filter. The same results were confirmed. The encoding essence of penumbral imaging was revealed. With MCNP(Monte Carlo N-particle) simulation,the neutron penumbral images of the large area source (200 μm×200 μm) on scintillation fiber array were obtained. The improved Wiener filter method was used to reconstruct the penumbral image and the source image was obtained. The results agree with the preset neutron source image. The feasibility of the neutron imaging system was verified.

Epidemiology of community pre-hypertensive patients and related risk factors in Chengdu city

Objective:This study aims to explore the epidemiologic characteristics of pre-hypertension,its related risk factors of cardiovascular diseases and its relativity with metabolic disorders among community residents of Chengdu city.Methods:Cluster random sampling was performed in three districts and counties of Chengdu.A total of 3524 residents(resident for≥1 year,≥18 years of age)were enrolled in the investigation.All the participants were interviewed in the questionnaire survey.Physical examination,blood pressure measurements,and blood sampling were also performed.Results:The overall prevalence of pre-hypertension was 34.07%.The prevalence of prehyper-tension was higher in males than in females(41.16%vs.23.89%,P<0.05).The prevalence of pre-hypertension among patients with systolic/diastolic blood pressures of 120-129 mmHg/80-84 mmHg and 130-139 mmHg/85-89 mmHg were 34.90%and 17.16%,respectively.The prevalence of pre-hypertension increased with age,reaching a peak at 30-39 years(39.93%),and then declined.Multi-ple risk factors for cardiovascular disease were more common in patients with hypertension and pre-hypertension than in the population with normal blood pressure.Pre-hypertension was associated with increased fasting blood glucose and increased relative risks of hypertriglyceridemia,hyperuricemia,overweight,obesity,and abdominal obesity,compared with patients who had normal blood pressure.Conclusion:The prevalence of pre-hypertension in residents of Chengdu was high.Multiple metabolic disorders were already present in the population,and multiple cardiovascular disease risk factors were more common than in the population with normal blood pressure.Early screening for cardiovascular risk factors should be performed in patients with pre-hypertension.In addition,comprehensive measures,such as lifestyle improvement and medications,should be implemented.