四、花粉植株染色体加培(一)花粉植株的染色体小麦属中,一粒小麦为二倍体,体细胞有两个染色体组,染色体组的基数 x=7,其体细胞染色体数2n=2x=14;二粒小麦为四倍体,体细胞染色体数2n=4x=28;普通小麦为六倍体,体细胞有6个染色体组,染色体组的基数为7,其体细胞染色体数2n=6x=42。因此,一粒小麦花粉植株(未加倍)只有一个染色体组,称为单倍体(或一倍体);二粒小麦的花粉植株(未加倍)有2个染色体组,称为二倍体;普通小麦的花 Pollen plant chromosome plus Pei (a) pollen plant chromosomes Triticum, one grain of wheat is diploid, somatic cells have two genomes, chromosome group base x = 7, the somatic chromosome number 2n = 2x = 14; two wheat is tetraploid, somatic chromosome number 2n = 4x = 28; common wheat is hexaploid, somatic cells have 6 genomes, chromosome group base 7, the somatic chromosome number 2n = 6x = 42. Thus, a wheat pollen plant (no doubling) has only one chromosome set called haploid (or diploid); the pollen plant (without doubling) of two wheat has two chromosome sets called diploid; Common wheat flowers