The document summarizes the backcross method for transferring recessive genes. It involves crossing a hybrid F1 plant with one of its parents, called the recurrent parent, to transfer genes from the other parent, called the donor parent. Over multiple generations of backcrossing and selection, the gene is introgressed into the recurrent parent's genetic background. The method is useful for transferring simply inherited traits like disease resistance between varieties of the same species. It has been widely used in crops like cotton and wheat to develop improved varieties with new disease resistances while retaining the recurrent parent's traits.