Crop Science Dept., University of Guelph, Guelph, Ontario, Canada.
Genetics. 1975 Oct;81(2):263-75. doi: 10.1093/genetics/81.2.263.
Genetic control over chromosome stability in the interspecific hybrid embryos of Hordeum vulgare and H. bulbosum has been hypothesized to reside on specific chromosomes. In this study, crosses between the primary trisomic lines for the seven different H. vulgare chromosomes and tetraploid H. bulbosum revealed that both chromosomes 2 and 3 of H. vulgare were involved in the control of chromosome elimination. Subsequent crosses using the available monotelotrisomics for chromosomes 2 and 3 led to the conclusion that both arms of chromosome 2 and the short arm of chromosome 3 most likely contain major genetic factors.-From the results of this study and the genome balance observed in the interspecific crosses between H. vulgare and H. bulbosum at the diploid and tetraploid cytotypes, it appears that the factors causing the elimination of the bulbosum chromosomes are located on the H. vulgare chromosome. These factors are offset or balanced by factors on the H. bulbosum chromosomes which, when present in sufficient dosage, either neutralize the effects of the vulgare factors or are able to "protect" the bulbosum chromosomes.
已假设大麦和珠芽百合种间杂种胚胎中的染色体稳定性的遗传控制位于特定染色体上。在这项研究中，对七种不同的大麦染色体的初级三体系与四倍体珠芽百合进行杂交，结果表明大麦的 2 号和 3 号染色体都参与了染色体消除的控制。随后使用 2 号和 3 号染色体的现有单体三体系进行杂交，得出结论：2 号染色体的两条臂和 3 号染色体的短臂很可能包含主要的遗传因素。——从这项研究的结果以及在大麦和珠芽百合的种间杂交中观察到的二倍体和四倍体细胞型的基因组平衡来看，导致珠芽百合染色体消除的因素位于大麦染色体上。这些因素被珠芽百合染色体上的因素抵消或平衡，当存在足够的剂量时，这些因素要么中和大麦因素的影响，要么能够“保护”珠芽百合染色体。
