摘要
中国春（Ｃｈｉｎｅｓｅｓｐｒｉｎｇ２ｎ＝６ｘ＝４２）与光稃野燕麦（ＡｖｅｎａｆａｔｕａＬ．２ｎ＝６ｘ＝４２）杂交成功。中国春穗较小，无芒，叶片较窄，而中国春与光稃野燕麦的杂种稳形较大，有短芒，籽粒饱满，且叶片宽大近似于野燕麦，表现优势很强。进行根尖细胞核型分析，发现大部分为单体（２ｎ＝２０Ⅱ＋１Ⅰ＝４１），在其中仅看到极少数二体和缺体，比例不到１％。杂种中有２对普通小麦所没有的近端着丝点染色体。核型分析结果证明了中国春与光稃野燕麦杂种的真实性。
The direct hybridization betwen Chinese Spring(2n=6x=42) and Avena fatua L.(2n-6x-42)are succeeded.Chinese Spring has very small ear,awnless,very narrow leaf blade;but hybrid has very big ear, short awn and filled grain,and leaf blade are very wide like Avena fatua L.The karyotype analysis shows that the majority of the chromosomes of root-tip cell were monosomic(2n=20Ⅱ+1=41),only minority were disomic and nullisomic(about1% ).Hybrids have two pairs of acrocentric chromosome.The karyotype analysis shows that hybrid was true.
出处
《西南农业学报》
CSCD
1996年第1期33-38,共6页
Southwest China Journal of Agricultural Sciences
基金
国家自然科学基金委员会主任基金
关键词
中国春
光稃野燕麦
核型分析
小麦
Chinese Spring
Avena fatua L.
Karyotype analysis.
