Butorina A K, Bogdanova E V
Voronezh State University.
Tsitologiia. 2001;43(8):809-14.
The karyotype (2n = 24 + 1B) was detected in 8 trees of Picea glauca (Moench.) Voss. = P. canadensis B.S.P., and the karyotype (2n = 24) was detected in 2 trees of spruce from the same stand in the centre of Voronezh. The majority of seeds, collected from these trees, were empty. From 150 selected seeds, which were full, four plantlets were obtained. One of them died, another one had no mitotic figures, and the third and fourth plantlets had karyotypes (2n = 24 + 1B, and 2n = 24, respectively). A possible mechanism of formation of B-chromosomes and their adaptive role are discussed.
在8株白云杉（Picea glauca (Moench.) Voss. = P. canadensis B.S.P.）中检测到核型（2n = 24 + 1B），在沃罗涅日市中心同一林分的2株云杉中检测到核型（2n = 24）。从这些树上采集的大多数种子都是空的。从150粒挑选出的饱满种子中，获得了4株幼苗。其中一株死亡，另一株没有有丝分裂图像，第三株和第四株幼苗的核型分别为（2n = 24 + 1B和2n = 24）。文中讨论了B染色体形成的可能机制及其适应性作用。
