Estimation of combining ability in sterile lines analogs of simple and three-linear maize hybrids

The combining ability during hybridization of sterile lines analogs in maize with M-type of cytoplasmic male sterility was determined. The effect of cytoplasm sterility on crop capacity, plant's height, height of spadix attachment, panicle length and length of panicle pedicle was estimated. The specificity of interaction of sterile analogs in simple and three-linear hybrids was revealed. The author shows as free occurrence advantages as negative effect of sterile cytoplasm on crop capacity. It was established, that M-type of cytoplasmic male sterility has mainly depressive influence on plant's height, height of spadix attachment, length of panicle pedicle and panicle length.