Genome. 1994 Dec;37(6):1027-34. doi: 10.1139/g94-146.
Seventeen controlled crosses in which the mitotically unstable B chromosome of Locusta migratoria was carried by one parent only have provided evidence that B chromosomes are significantly eliminated during sexual transmission in males, at a mean rate that almost counteracts the premeiotic accumulation derived from mitotic instability during germ line development. On the other hand, B chromosomes are significantly accumulated in females, presumably by their preferential migration to the secondary oocyte during the first meiotic division. These results substantially change the current knowledge about this B chromosome system, because the main B accumulation occurs in females and not in males, as was hitherto thought. Furthermore, this case shows that the maintenance of a single B system in natural populations may be the result of many different forces and mechanisms acting for and against B chromosomes.
17 个控制杂交实验表明，在雄性有性生殖过程中，仅由一个亲代携带的不稳定的飞蝗 B 染色体显著减少，其减少的速度几乎可以抵消有丝分裂不稳定性在生殖系发育过程中导致的减数分裂前积累。另一方面，B 染色体在雌性中显著积累，可能是因为它们在第一次减数分裂过程中优先迁移到次级卵母细胞中。这些结果极大地改变了目前对这个 B 染色体系统的认识，因为主要的 B 染色体积累发生在雌性而不是雄性，这与以前的观点相反。此外，这个例子表明，在自然种群中维持单一 B 染色体系统可能是多种不同的力量和机制共同作用的结果，这些力量和机制既有促进 B 染色体的，也有抑制 B 染色体的。
