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二倍体扁蓄豆与四倍体肇东苜蓿正反交有孕性杂种中期Ⅰ的染色体均以16者居多数,分别为55％和53.1％;中期Ⅰ和中期Ⅱ的异常染色体正反交杂种比肇东苜蓿分别多达24.8倍和25.6倍,属异源四倍体远缘有性杂种。
The chromosomes of the diploid and intermediate cross Ⅰ of reciprocal cross between diploid orthodox and tetraploid Zhaodong alfalfa were all 55% and 53.1%, respectively. The chromosomal abnormalities in interim I and II The hybrid was 24.8 times and 25.6 times more than that of Zhaodong alfalfa respectively, belonging to allopolyploid tetraploid hybrids.