【摘要】 多倍体育种在花卉育种具有重要意义。通过对二倍体和四倍体金鱼草的形态学和细胞学作了初步研究,结果表明多倍体具有很大优势。体现在四倍体金鱼草器官的巨大性,生长旺盛等,四倍体在植株的高度、叶片数、花苞数、花径大小、分枝数、气孔长和宽分别为二倍体的248.2%,185.4%,148.9%,136.9%,136.5%,162.4%,123.3%,其差异达到显著水平。在花粉粒特征上,四倍体和二倍体花粉粒均为球形,差异不显著。染色体鉴定表明,二倍体染色体数为2n=2x=16,四倍体染色体数为2n=4x=32。更多还原

【Abstract】 Polyploid breeding is very important for flower breeding.By the study on the morphology and ctyology of diploid and tetraploid of Antirrihinum majus,it was proved that polyploid had great advantages and the tremendous organs were reflected by tetraploid plants.Compared with dipoids,plant height,leaf number,flower number,flower diameter,branch number,stoma length and stoma width of tetraploids were 248.2%,185.4%,148.9%,136.9%,136.5%,162.4%,123.3% than those of the dipoids,respectively.In the comparison of pollen grains characteristics,the pollen grains of tetraploid and diploid were global shape,there was no significant difference.Through chromosome identification,the chromosome numbers of diploid and tetraploid were 16 and 32,respectirely.更多还原