Extending the rapeseed gene pool with resynthesized Brassica napus II: Heterosis.
Extending the rapeseed gene pool with resynthesized Brassica napus II: Heterosis.
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DOI：
10.1007/s00122-011-1765-7
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发表时间：
2012-04
影响因子：
5.4
通讯作者：
Becker, Heiko C.
中科院分区：
文献类型：
--
作者：
Girke, Andreas;Schierholt, Antje;Becker, Heiko C.
杂交育种依赖于来自两个不同杂种优势群的亲本的组合。然而，适应油菜育种材料的遗传多样性是相当有限的。因此，研究了再合成的甘蓝型油菜作为远缘基因库的用途。杂交种来自44个具有不同遗传背景的再合成品系和两个雄性不育冬油菜测试品系之间的杂交。在德国的5个地点进行了2年的杂交种及其亲本和对照品种的评价。产量，株高，种子油，蛋白质含量进行了监测，并估计与分子标记（127多态性RFLP片段）的遗传距离。再合成品系的产量在40.9 dt/ha和21.5 dt/ha之间变化，或在对照品种产量的85.1和44.6%之间。产量和含油量分别为对照品种的91.6%~ 116.6%和94.5%~ 103.3%。产量的中亲优势介于-3.5%至47.2%之间。亲本间的遗传距离与杂种优势和产量相关不显著。虽然再合成的品系不符合优良油菜标准，但由于它们与现有育种材料的距离大，并且与欧洲冬油菜组合时具有高杂种优势，因此它们是杂交育种的有价值来源。本文的在线版本（doi：10.1007/s 00122 -011-1765-7）包含补充材料，可供授权用户使用。
Hybrid breeding relies on the combination of parents from two differing heterotic groups. However, the genetic diversity in adapted oilseed rape breeding material is rather limited. Therefore, the use of resynthesized Brassica napus as a distant gene pool was investigated. Hybrids were derived from crosses between 44 resynthesized lines with a diverse genetic background and two male sterile winter oilseed rape tester lines. The hybrids were evaluated together with their parents and check cultivars in 2 years and five locations in Germany. Yield, plant height, seed oil, and protein content were monitored, and genetic distances were estimated with molecular markers (127 polymorphic RFLP fragments). Resynthesized lines varied in yield between 40.9 dt/ha and 21.5 dt/ha, or between 85.1 and 44.6% of check cultivar yields. Relative to check cultivars, hybrids varied from 91.6 to 116.6% in yield and from 94.5 to 103.3% in seed oil content. Mid-parent heterosis varied from −3.5 to 47.2% for yield. The genetic distance of parental lines was not significantly correlated with heterosis or hybrid yield. Although resynthesized lines do not meet the elite rapeseed standards, they are a valuable source for hybrid breeding due to their large distance from present breeding material and their high heterosis when combined with European winter oilseed rape. The online version of this article (doi:10.1007/s00122-011-1765-7) contains supplementary material, which is available to authorized users.
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影响因子：
2
作者：
Girke, Andreas;Schierholt, Antje;Becker, Heiko C.
通讯作者：
Becker, Heiko C.
影响因子：
5.8
作者：
Seyis, F;Friedt, W;Lühs, W
通讯作者：
Lühs, W
影响因子：
2
作者：
Riaz, A;Li, G;Quiros, CF
通讯作者：
Quiros, CF
影响因子：
5.4
作者：
BECKER, HC;ENGQVIST, GM;KARLSSON, B
通讯作者：
KARLSSON, B
影响因子：
2
作者：
Rygulla, W.;Friedt, W.;Snowdon, R. J.
通讯作者：
Snowdon, R. J.