G带

chr: Chromosome
start: Start position in chromosome sequence
end: End position in chromosome sequence
name: Name of cytogenetic band
gieStain: Giemsa stain results. Recognized stain value: gneg,gpos50,gpos75,gpos100,acen,gvar,stalk

G带: 经胰蛋白酶、NaOH、柠檬酸盐或尿素等试剂处理后,再经吉姆萨染色(giemsa stain)，显示的深浅交替的横纹便是G带。染色体的G带在普通光学显微镜下即可观察
可变区(gvar)
柄环(stalk) 与核仁形成有关
着丝粒(acen)
负染色区(gneg) GC含量比较高,基因数量比较多
正染色区(gpos) 根据染色深浅区分,gpos25%/50%/75%/100% 染色区 AT含量比较高 基因数量少

Giemsa_stain.png

参考：
生信地基系列--Cytoband格式 - 简书 (jianshu.com)
http://www.360doc.com/content/19/1227/09/68115424_882480877.shtml