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利用从美国引进的高粱3197A原原种组配了晋杂一号(原)、晋杂四号(原)和晋杂五号(原)3个杂交种.并用这些原种与我国目前生产上使用的3197A、晋杂一号、晋杂四号、晋杂五号在人工接种条件下做了对丝黑穗病敏感性的比较试验.结果表明,3197A自身对丝黑穗病的敏感性和这一特性的遗传能力没有发生显著变化,其抗病性丧失是由于我国丝黑穗病菌生理小种变化所致.
The original hybrids of sorghum 3197A introduced from the United States were used to prepare three hybrids of Jinza No.1, Jinza4 and Jinza5 (original) The results showed that the sensitivity of 3197A to head smut and the sensitivity of 3197A to head smut were the same with those of 3197A, Jinza1, Jinza4 and Jinza5 under artificial inoculation The genetic ability of this trait did not change significantly, and the loss of its disease resistance was due to the change of physiological races in China.