普通小麦×大麦杂种后代细胞遗传学研究

普通小麦×大麦杂种与普通小麦回交，产生了具有普通小麦细胞质带有部分大麦细胞核的普通小麦－大麦属间杂种后代，对其连续多年套袋自交，测交、细胞学鉴定和定向选择，从自交后代群体中筛选出一部分异附加系、异代换系和易位系街人有大麦某些特性的小析类型，并系统地对本和二体附加系自交后代染色体的分离行为作了遗传分析。结果表明：２ｎ＝４３的单体附加标株自交分离出单体附加的频率为２５．６％，二体附加的频率为１．２％；

STUDIES ON CYTOGENETICS OF TRANSFERENCE HORDEUM DISTICUM DESIRED GENE TO TRITICUM AESTIVUM

Some relatively stable alien addition line, alien substitution line and translocationline were obtained by the means of formation and cytology indentifyng and directed selecting the backcross progenies,Which were backcrossed intergenous F1 hybrids betweencommon wheat and cultivated barley bachcross with common wheat. Furthermore, thesegregation action of addition chromosome in selfing generation was systematically investigated. The results showed that the segregation frequency of monosomic and disomicaddition of monosomic addition line (2n = 43) was 25.6 % and 1. 2% respectively in selfing generations. But those of disomic addition line (2n=44) were 29. 9% and 50. 3%respectively. the number plants of dlsomic was 86. 7 % in (2n = 44) addition line;The addition chromosome transsmission rate in disomic addition line was obviously higher thanthat of monosomic addition line in their selfing generation,disomic addition line was relatively liable to preserve.