Heterosis and nuclear DNA content in maize
Heterosis and nuclear DNA content in maize
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DOI：
10.1038/hdy.1993.139
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发表时间：
1993-09
期刊：
影响因子：
3.8
通讯作者：
D. P. Biradar;A. Rayburn
中科院分区：
文献类型：
--
作者：
D. P. Biradar;A. Rayburn
分析了25个玉米杂交种F1代细胞核DNA含量。12个杂种先前已被报道具有低的杂种优势反应，而13个具有高的杂种优势反应。将各杂种F1代的核DNA含量与其各自亲本的中点DNA含量进行比较。在9个低杂种优势反应的杂交种中，观察到的核DNA量超过预期的DNA量约5%.12个高杂种优势反应的杂交种中，观察到的核DNA量与预期的DNA量没有显著差异。这些结果表明，玉米杂种F1的杂种优势反应与核DNA含量遗传之间存在着一定的联系。
Twenty-five F 1 maize hybrids were analysed with respect to their nuclear DNA content. Twelve of the hybrids have been reported previously to have a low heterotic response while 13 have a high heterotic response. The nuclear DNA content of each F 1 hybrid was compared with the midpoint DNA amount of its respective parents. In nine of the hybrids with the low heterotic response, the observed nuclear DNA amount exceeded the expected DNA amount by approximately 5 per cent. In 12 of the 13 hybrids that had a high heterotic response, the observed nuclear DNA amount was not significantly different from the expected DNA amount. These results demonstrate an association between heterotic response and nuclear DNA content inheritance in F 1 hybrids of maize.