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通过田间和大棚接种鉴定,研究了20个郁金香杂交F1代的644个植株对郁金香灰霉病的抗性及其遗传关系,并以病情指数评价了郁金香杂交F1代的抗病性。结果表明,在供试的杂交F1代中,Bellona×Flair Mutant分离出了10％的高抗植株,Bellow×(M．Miles×LW 76313—3k)分离出了41．7％的抗病植株,这为杂交选育抗病新品种提供了依据;杂交F1代群体的抗病性以Bellona×(LW×White Sail 75308—4k)较好,且其病情指数最低,为55;郁金香杂交F1代群体的抗病性存在差异,呈连续性分布,表现出数量性状遗传的特征,初步推断这可能受微效抗病多基因控制。
Through inoculation and identification in field and greenhouse, the resistance and genetic relationship of 644 F1 hybrids of tulip in F1 generation to Botrytis cinerea were studied. Disease resistance of hybrid F1 generation of tulip was evaluated by disease index. The results showed that 10% of high resistant plants were isolated from Bellona × Flair Mutant and 41.7% of resistant plants were isolated from Bellow × (M.Miles × LW 76313-3k) This provided a basis for the breeding of new varieties of disease resistance. The disease resistance of hybrid F1 generation was better than that of Bellona × (White Worm 75308-4k), and its disease index was the lowest (55) There were differences in disease resistance, which showed a continuous distribution and showed the genetic characteristics of quantitative traits. It was preliminarily concluded that this may be controlled by a multi-gene with minor-effect disease resistance.