普通小麦-华山新麦草异代换系的选育及细胞遗传学研究  

BREEDING AND CYTOGENETIC STUDY OF TRITICUM AESTIVUM-PSATHYROSTACHYS HUASHANICA ALIEN SUBSTITUTION LINES

作　　者：侯文胜[1] 张安静[1] 杨群慧[1] 傅杰[1] 陈漱阳[1] 

机构地区：[1]中国科学院西北植物研究所陕西省植物遗传工程育种重点实验室,陕西杨陵712100

出　　处：《西北植物学报》1997年第3期368-373,共6页Acta Botanica Boreali-Occidentalia Sinica

基　　金：中科院遗传研究所植物细胞与染色体工程国家重点实验室开放课题;陕西省自然科学基金

摘　　要：利用缺体小麦与小麦-华山新麦草七倍体杂种（2n＝49，AABBDDN）杂交，F1再与相应’的缺体小麦回交2次，在BC2F1境检选出2n＝41的植株，同时套袋自交，选育出5A和3D两种异代换系。单体代换植株自交产生二体代换植株的频率为23．16％。5A代换植株在减数分裂中期121Ⅱ的出现频率平均为84.52％，3D代换植株21Ⅱ的出现频率平均为62.61％。异代换系均生长旺盛，结实正常，说明异染色体能较好地补偿所缺失的小麦染色体。Crosses were made between nullisomic wheat and Triticum aestivum-Psathy-rostachys huashanica heptaploid (2n = 49, AABBDDN ), and the F1 plants were back-crossed twice to their respective nullisomic wheat. The plants with 2n = 41 of BC2 F1were selected by microscope and selfed. The frequency of disomic substitutinn plants de-rived from selfed monosomic substitution plants was 23. 16％. The 21 bivalents at MI inthe PMCs of 5A and 3D alien substitution lines averages 84. 52% and 62. 61% respec-tively. Alien substitution lines are vigorous and fertile,indicating that the alien chromo-somes are able to compensate for the missing chromosomes.

关 键 词：普通小麦 华山新麦草 异代换系 细胞遗传学 

分 类 号：S512.103.2[农业科学—作物学]