【摘要】 【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。更多还原

【Abstract】 Objective This study aimed at investigating the effects of grafting cotton on Verticillium wilt resistance,yield and fiber quality of cotton,and farther discussing the feasibility of controlling cotton Verticillium wilt using grafting.Method Two sea island cotton(Gossypium barbadense L.) lines(resistant to Verticillium dahliae),Hai 7124 and Pima 90,were selected as rootstocks.The scions were two upland cotton(G.hirsutum) cultivars Xiangzamian 21(tolerant to Verticillium dahliae) and Jimian 11(susceptible to Verticillium dahliae).The four grafting combinations were completed and planted in the naturally infected cotton field,and the data of cotton Verticillium wilt,yield and fiber quality were investigated in grafting and non-grafting cotton types.Result Compared to the scion controls,the severity of cotton Verticillium wilt on the grafting cotton was significantly reduced,and the resistance to cotton Verticillium wilt of some grafting combinations was not significantly different from the resistant rootstock controls.The plant height,number of sympodial branches/plant,number of total bolls/m2,seed cotton yield and lint yield of grafting cotton were higher than that of the scion controls,respectively.Grafting nearly had no effects on growth,lint,boll weight and fiber quality of the majority of grafting combinations.Conclusion This study showed that grafting could be used as an effective method for control cotton Verticillium wilt and increase yield in continuous cropping cotton field.更多还原