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利用八倍体小黑麦劲松49和八倍体小滨麦950059杂交合成了小麦-黑麦-滨麦草三属杂种,对不同基因组染色体在三属杂种F1减数分裂和小孢子发育过程中的行为进行了研究。基因组原位杂交(GISH)结果表明劲松49和小滨950059均包含44条小麦染色体和12条外源染色体,三属杂种F1中含有6条黑麦染色体和6条滨麦草染色体。减数分裂过程中黑麦和滨麦草染色体很少与小麦染色体配对,常以单价体形态存在。小孢子中的微核主要由外源染色体组成。在三属杂种F1的花粉发育过程中还发现了染色体浓缩不同步的现象。
Triticum aestivum L. hybrid Jinsong 49 and octoploid Bombyx mori 950059 were used to synthesize the three genotypes of wheat-rye-berberine. The effects of different genomic chromosomes on meiosis and microspore development of three-hybrid F1 Behavior was studied. Genome in situ hybridization (GISH) results showed that Jinsong 49 and Xiao-Bin 950059 contained 44 wheat chromosomes and 12 exogenous chromosomes. The three-hybrid F1 contained 6 rye chromosomes and 6 haystack chromosomes. During meiosis, chromosomes of rye and bermudagrass are rarely paired with wheat chromosomes, often in monovalent forms. Micronuclei in microspores mainly consist of exogenous chromosomes. In the process of pollen development of three-hybrid F1, we also found that the chromosome concentration is not synchronous.