Analysis of pistil fertility in early generation of backcross of male sterile lines Ms‐4 of alfalfa

摘要

Male sterile lines Ms‐4 of alfalfa is an important material for heterosis.It was selected from Medicago v aria Martin.cv..Caoyuan No.1.by professor Y.Wu in 1978 (Y.Wu,1980).However, it can not be widely used in production because its pistil has lower fertility.So selecting new,better male sterile plants rapidly and effectively is the urgent to solve the above‐mentioned problem.