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利用“单株植物C -带技术” ,对 6x小簇麦与普通小麦的杂种F2 和回交BC1世代的染色体结构进行观察 ,研究了簇毛麦染色体在杂种后代中的传递行为。结果表明 ,在大多数杂种组合中 ,簇毛麦染色体通过雌配子的传递行为是随机的 ,并显著高于通过雄配子的概率 ,但在含有小麦亲本‘J 11’的杂种组合中情况不同 ,簇毛麦染色体在这个杂种组合中通过雌、雄配子的传递率都是随机的。说明簇毛麦染色体的传递受杂种F1中小麦亲本的影响 ,推测在小麦亲本‘J 11’中可能存在一个影响簇毛麦染色体通过雄配子传递的基因。单个簇毛麦染色体的传递与 6x小簇麦作为父本或母本有关。通过雌雄配子传递中 ,以 4V和 7V染色体的传递频率最高 ,而 3V的传递频率最低。本研究结果表明 ,在用 6x小簇麦作为桥梁转移簇毛麦有利基因 ,创制杂种F1时 ,最好以普通小麦为父本 ,并且F3 和BC1F2 是关键的选择世代
Using the “C - band technique per plant”, we observed the chromosome structure of hybrid F2 and backcrossing BC1 generations between 6x small cluster wheat and common wheat, and studied the transfer behavior of the chromosome family in the hybrid progeny. The results showed that in most hybrid combinations, the transmission of chromosome-like maize chromosomes through the female gametes was random and significantly higher than that through the male gametes, but different in hybrid combinations containing the wheat parent ’J 11’ Hirsutum chromosome transmission rate in this hybrid combination through the female and male gametes are random. The results showed that the transmission of chromosomes in ramie was affected by the wheat parents in F1 hybrids. It is speculated that there may be a gene that affects the transmission of ratooning maize chromosomes through the male gametes in ’J11’. The transfer of a single cluster of maize chromosomes is related to 6x small clusters of wheat as paternal or maternal parent. Through the transfer of male and female gametes, 4V and 7V chromosomes have the highest frequency of transmission, while 3V have the lowest frequency of transmission. The results of this study indicate that it is best to use common wheat as a male parent when creating hybrid F1 with 6x small clusters of wheat as a bridge favorable gene for transfer of cluster hay and F3 and BC1F2 as key selection generations