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【目的】研究嫁接棉花对棉花黄萎病抗性、产量和纤维品质的影响,探索通过嫁接来防治棉花黄萎病的可行性。【方法】选用已明确抗黄萎病的海岛棉Gossypium barbadense L.海7124和Pima90为砧木,以陆地棉G.hirsutum品种湘杂棉21和感病品系冀棉11为接穗,完成4个嫁接组合,将其种植在连作棉田,调查嫁接棉花和非嫁接棉花的棉花黄萎病、产量和纤维品质。【结果】嫁接棉花和接穗对照相比,棉花黄萎病明显减轻,有些嫁接组合的抗病性达到高抗水平。和接穗对照相比,多数嫁接组合的株高和果枝数高于对照,嫁接对多数嫁接组合的现蕾期、开花期、吐絮期、衣分、铃重以及纤维品质的大多指标影响不显著。4个嫁接组合的结铃数/m2、籽棉和皮棉产量均高于各自的接穗对照。【结论】选取合适的砧木和接穗嫁接组合,可以有效地防治棉花黄萎病和提高连作棉田的棉花产量。
【Objective】 The objective of this study was to investigate the effects of grafted cotton on resistance to cotton Verticillium wilt, yield and fiber quality and to explore the feasibility of preventing and treating Verticillium dahliae by grafting. 【Method】 The Gossypium barbadense L. sea 7124 and Pima90, which were definitively resistant to Verticillium wilt, were selected as the rootstocks. Four gossypium-derived grafting combinations were obtained from the G. hirsutum variety Xiangzamian 21 and the susceptible strain Ji Mian 11 as the scion. , Planted it in continuous cropping cotton fields to investigate the occurrence of cotton verticillium wilt, yield and fiber quality of grafted and non-grafted cotton. 【Result】 Verticillium wilt was significantly reduced in grafted cotton compared to scion control, and some of the grafted combinations achieved high resistance to disease. Compared with the scion control, the majority of grafting combinations had higher plant height and fruiting branch number than the control, and grafting had no significant effect on most indexes of budding, flowering, boll opening, boll weight, boll weight and fiber quality of most grafting combinations. The number of bolls / m2 for the four grafting combinations and the seed cotton and lint yield were all higher than the respective scion controls. 【Conclusion】 Selecting appropriate rootstocks and scion grafting combinations can effectively prevent and control cotton verticillium wilt and increase cotton yield in continuous cropping.