利用抗病品种防治高粱丝黑穗病的研究

1979～1982年鉴定出19个免疫高粱品种,2个免疫恢复系,4个免疫和1个高抗不育系,其中Tx622A免疫不育系的抗病性似为显性。用Tx622A免疫不育系组配的杂交种Tx622A×4003、Tx622A×晋辐1、Tx622A×298/4003、Tx622A×锦恢75为免疫杂交种,Tx622A×208为高抗杂交种,Tx622A×白平为抗病杂交种。1981～1983年用以上抗病高产杂交种进行了20多万亩的防治示范,对丝黑穗病的防治效果均极为显著,由92～100％,平均99.0％,增产粮食1000多万斤。

UTILIZATION OF VARIETAL RESISTANCE IN CONTROLLING HEAD SMUT OF SORGHUM [SPHACELOTHECA REILIANA (KüHN) CLINTON]

Nineteen immune sorghum varieties, 2 immune restorer lines, 4 immune and 1 high-resistant male-sterile lines were identified in 1979~1982 for their resistance to head smut of sorghum. It was found that immune male-sterile line Tx622A seemed to have dominant gene for resistance as hybrids produced from it with 4003, "Jinfu-1",298/4003 and "Jinhui-75" are immune,hybrid.Tx622A×208 is highly resistant and hybrid Tx622A×"Baiping" is resistant.More than 200 thousand mu of demonstration fields are grown to these resistant high-yielding hybrids in 1981~1983.Very significant controlling effect (ranging from 92% to 100%, averaging 99%) were obtained and the output of sorghum grain went up enormously.