MITOTIC AND MEIOTIC CHROMOSOME BEHAVIOR IN NEW HYBRIDS OF HORDEUM WITH TRITICUM AND SECALE
MITOTIC AND MEIOTIC CHROMOSOME BEHAVIOR IN NEW HYBRIDS OF HORDEUM WITH TRITICUM AND SECALE
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DOI：
10.1038/hdy.1980.17
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发表时间：
1980-01-01
期刊：
影响因子：
3.8
通讯作者：
BENNETT, MD
中科院分区：
文献类型：
--
作者：
FINCH, RA;BENNETT, MD
在新杂种2x H中发现了花粉母细胞的第一次中期分裂。微柱6x T. aestivum（2n = 28），2x H.智利时报2x S. cereale（2n = 14），4x H.短叶藓短芒草2x S. africanum（2n = 21）和2x H.大众时报6x H.鼠属simulans（2n = 28），在6x H.鼠属模拟时报2x H. vulgare（2n = 28）和6 × H.前肛2x H。vulgare（2n = 28）。属间杂种在中期Ⅰ除H. jubatum染色体在与S.非洲的。多价体罕见或不存在，每个整倍体PMC（非加倍）的平均交叉频率在H中分别为2.55、2.50、2.25和1.50。朱巴图姆时报S. africanum、H.大众时报H. murinum和H. murinum和H.前肛H. vulgare，分别。在具有中期Ⅰ交叉的杂种中，33-93%的pmc为非整倍体（或少数为多倍体）; vulgare杂种，体细胞不稳定也发生。没有杂交种子。新杂种的有丝分裂染色体（2n = 14）为2x H.智利时报2x S. africanum，2x S. montanum和2x S. vavilovii和杂种，2x H.大众时报2x S. Africanum，为首次描述。这些杂种是有力的，但没有开花，可能是由于缺乏春化。
First metaphase in pollen mother cells (pmc) is described in the new hybrids, 2x H. pusillum .times. 6x T. aestivum (2n = 28), 2x H. chilense .times. 2x S. cereale (2n = 14), 4x H. jubatum ssp. breviaristatum .times. 2x S. africanum (2n = 21) and 2x H. vulgare .times. 6x H. murinum ssp. simulans (2n = 28), and for the 1st time in 6x H. murinum ssp. simulans .times. 2x H. vulgare (2n = 28) and 6x H. procerum .times. 2x H. vulgare (2n = 28). The intergeneric hybrids had no chiasmata at metaphase I except those between H. jubatum chromosomes in the hybrid with S. africanum. Multivalents were rare or absent and mean chiasma frequencies per euploid pmc (non-doubled) were 2.55, 2.50, 2.25 and 1.50 in H. jubatum .times. S. africanum, H. vulgare .times. H. murinum, and in H. murinum and H. procerum .times. H. vulgare, respectively. In hybrids with metaphase I chiasmata, 33-93% of pmc were aneuploid (or rarely polyploid) and in H. vulgare hybrids, somatic instability also occurred. No hybrid set seed. Mitotic chromosomes (2n = 14) of the new hybrids 2x H. chilense .times. 2x S. africanum, 2x S. montanum and 2x S. vavilovii, and the hybrid, 2x H. vulgare .times. 2x S. africanum, are described for the 1st time. These hybrids were vigorous, but have not flowered, probably through lack of vernalization.