陆海种间图谱加密与染色体结构变异分析

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棉花是世界上最重要的天然纤维作物,同时也是重要的油料作物。棉属约有52个种,包括7个异源四倍体棉种和45个二倍体棉种,其中4个经过人类驯化成为了栽培种,分别为二倍体的草棉和亚洲棉以及四倍体的陆地棉和海岛棉。作为现在世界上种植面积最广的两个异源四倍体栽培品种,陆地棉丰产性好、适应性广,生产了全世界95%以上的原棉,但陆地棉纤维品质较差,并且人为选择也使得种内遗传基础比较狭窄。而海岛棉纤维品质优异,对黄萎病具有较强的抗性,但其产量较低使得种植面积较小。棉花育种注重产量和品质的同时提高,近年来,将海岛棉纤
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