蔬菜遗传性状的变异有两种:一种是具有明确的界限,表现为不连续变异的性状,称为质量性状(qualitaitve character),如蕃茄的紫茎和绿茎,菜豆的红花和白花等;另一种是需要用重量、长度等计量单位来度量,表现为连续变异的性状,称为数量性状(quantitative character),如植株高矮、果实大小、产量高低等。研究质量性状的遗传变异规 There are two types of variation in the genetic traits of vegetables: one is a character that has a definite boundary and is characterized by discontinuous variation, called qualitaitve characters such as purple and green stems of tomatoes, safflower and white flowers of beans, etc. ; The other is the need to use weight, length and other units of measurement, the performance of continuous variation traits, called the quantitative character (quantitative character), such as plant height, fruit size, yield level and so on. Study of genetic variation rules of quality traits