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为解决我国长江、淮河流域红麻主产区春播能留种,大面积夏播不早花且纤维相对高产问题,在我国拥有的红麻育种材料中发现了15份现蕾开花期对光长变化钝感的材料:纯感材料在短光下第一朵花节位在19～37节之间,播种至始花在80～105天之间,变异丰富。其中1份材料在正常生长季节表现早熟,其余晚熟,敏感材料在短光下的始花节位在8～11节之间,始花时间比钝感材料提前28～58天。经遗传分析,钝感对敏感表现为隐性,且由一对主基因控制。在部分杂交组合后代选到了在正常生长季节春播能收种、夏播不早花的高产优良钝感单株(系),为解决我国大部分红麻区留种与纤维高产问题展示了良好前景。可用以选育在长江流域春播不早蕾早花、又可纤维、种子兼收的中熟高产钝感品种,在北方不早花且纤维高产的麦茬麻。
In order to solve the problem of spring sowing in the main producing area of kenaf in the Yangtze River and Huaihe River basin in China and the problem of late sowing of large area of summer sowing and relative high yield of fiber in the kenaf, Change the insensitive material: Pure sense of material in the short light under the first flower node in 19 to 37, sowing between the beginning spent 80 to 105 days, rich in variation. Among them, 1 material showed early maturity in normal growing season. The other late-maturing, sensitive materials began to flower between 8 and 11 nodes in short light, and spent 28 to 58 days earlier than the insensitive material. After genetic analysis, insensitivity to the sensitive performance of recessive, and by a pair of major genes control. The progenies of some hybrid combinations were selected to plant in spring during normal growing season, with good yield and excellent insensitivity of single plant (line), showing good prospects for resolving the problems of high yielding and high yield of fiber in most kenaf areas in China . It can be used to breed middle-aged and high-yielding insensitive cultivars with early maturity and early spring sowing in the Yangtze River Basin, but also with fiber and seeds.