摘要
利用普通小麦与华山新麦草（２ｎ＝１４，ＮＮ）杂交与回交产生的七倍体杂种（ＡＡＢＢＤＤＮ，２ｎ＝４９），再与普通小麦回交，即产生单体附加（２ｎ＝４３），当以七倍体作父本时，产生单体附加的频率（２４．２％）高于七倍体作母本的频率（１２．２８％）。单体附加自交产生二体附加的频率为７．１９％。不同附加系的细胞学稳定性有差异，并随着逐代选择而有所提高。
Heptaploids were obtained by back crossing(common wheat×P. huashanica) F1 with common wheat. The disomic addition plants were produced by crossing the heptaploids with common wheat followed by selfing BC1F1 hybrids and selecting 2n=43 plants. If the heptaploid was used as male, the frequency of monosomic addition (24.2%) was higher than that if the heptaploid was used as female (12.28%). The frequency of disomic addition plants derived from selfing monosomic addition plants was 7.19% .The cytological stabilities among addition lines were different and increased with generations.
关键词
小麦
华山新麦草
异附加系
细胞遗传学
Triticum aestivum, P. huashanica, Alien addition line, Cytogenetics
