高菜(Brassica juncea Czern. et Coss.)为十字花科芸薹属芥菜类蔬菜,一二年生草本植物。高菜为异花授粉作物,杂种优势明显。使用常规方法,选择一个纯合自交系需要5~7年时间,应用小孢子技术能够在1-2年得到纯合的双单倍体植株,可缩短育种年限、提高育种效率;此外,获得的胚再生植株经过自然或人工加倍可获得双单倍体(DH)群体,便于遗传分析、构建遗传图谱、基因定位、转基因育种以
We demonstrate a self-starting erbium fiber oscillator-amplifier system based on the nonlinear polarization rotation mode-locked mechanism.The direct output pul
A four-wavelength Bragg reflection waveguide edge emitting diode based on intracavity spontaneous parametric down-conversion and four-wave mixing (FWM) processe
The total and partial charge-changing cross sections of 28Si on carbon targets at 736 and 723A MeV are studied by CR-39 plastic nuclear track detectors using th
Nanowires,nanofibers and nanotubes have been widely used as the building blocks in micro/nano-electromechanical systems,energy harvesting or storage devices,and