中国春—山羊草2C二体附加系同中国春—偃麦草二体附加系杂交后代的细胞遗传学研究

对中国春—长穗偃麦草（E.elongata 2n=14EE）二体附加系（1E-7E）与中国春—柱穗山羊草(Ae.cylindrica 2n=28 CCDD)2C二体附加系杂交后代进行细胞遗传学研究。结果表明，杂交当代（1E-7E）的结实率最高为36.06%，最低为19.43%，平均为29.5%。F₁自交结实率最高为62.09%，最低为30.92%，平均为39.64%。对照实验和方差分析表明，杀配子染色体对不同品系杂交的结实率影响有差异。杂交F₁减数分裂观察，看到F1单价体数超过理论数值，后期出现大量的染色体片段，认为这种异常现象与杀配子染色体的作用有关。

Cytogenetic Studies on the Cross-progenies Between Chinese Spring-Agilops 2C Disomic Addition and Chinese Spring-Elytriga Disomic Addition

The cytogenetics of the cross-progenies between Chinese Spring-Agilops 2C disomic addition and Chinese Spring-Elytriga disomic addition were studied.The results showed that The highest seed-setting of crossing generation is 36.06%,the lowest is 19.43% and average is 29.5%.The highest seed-setting of F_1-selfed is 62.09%,the lowest is 30.92% and average is 39.64%.the control experiment and analysis of variance showed that the gametocidal chromosome effected on the difference of seed-set rate of hybridization in different lines.After scrutinizing the meiosis of pollen mother cells(PMS)in F_1 hybrids,the results were concluded:the number of univalents exceeded the expected and some trivalents and tetravalents appeared at the same time.These were mainly caused by the gametocidal chromosome 2C.