Secondary polyploids, heterosis, and evolutionary crop breeding for further improvement of the plantain and banana (Musa spp. L) genome
Secondary polyploids, heterosis, and evolutionary crop breeding for further improvement of the plantain and banana (Musa spp. L) genome
复制标题
用于进一步改进大蕉和香蕉（Musa spp. L）基因组的次生多倍体、杂种优势和进化作物育种
DOI：
10.1007/s001220050524
复制
发表时间：
1997
影响因子：
5.4
通讯作者：
R. Ortiz
中科院分区：
文献类型：
--
作者：
R. Ortiz
通过育种程序已筛选出几个具有理想性状的初级四倍体。二倍体亲本原种已成为进一步遗传改良的Musagenome。因此，新的基因组操作应该在它们成为育种计划的常规之前进行测试。通过对三倍体地方品种、其初级四倍体杂交种和次级多倍体衍生物以及二倍体祖先的性能比较，发现次级三倍体（TM3x）的生产比次级四倍体的开发更有价值。TM3x实现了显着的高多倍体亲本杂种优势的产量，通过最大限度地提高杂合性，通过不相关的父母之间的杂交，或通过选择来自整倍体全同胞之间的杂交的杂种中的连锁。全同胞二次多倍体间的束重差异显著，说明在确定特定配合力时，不仅要考虑特定杂交组合，还要考虑各组合内的个体表现。本文提出了一种作物育种策略，考虑到香蕉和大蕉的驯化过程。目前的数据表明，这种类型的进化育种方法可能是可行的芭蕉。
Several primary tetraploids with desirable attributes have been selected byMusabreeding programs. Diploid parental stocks have become available for further genetic improvement of theMusagenome. Hence, new genome manipulations should be tested before they become routine in breeding programs. Through comparison of the performance of triploid landraces, their primary tetraploid hybrids and secondary polyploid derivatives, plus diploid ancestors, it was found that the production of secondary triploids (TM3x) is more rewarding than developing secondary tetraploids. TM3x achieved significant high polyploid-parent heterosis for yield either by maximizing heterozygosity through crosses between unrelated parents, or by selection of linkats in hybrids derived from crosses between euploid full-sibs. There were significant differences in bunch weight between full-sib secondary polyploids, which suggested that specific combining ability should be re-defined considering not only a specific cross combination but also the individual performance within each cross. This paper proposes a crop-breeding strategy which takes into consideration the process of domestication of banana and plantain. Current data suggest that this type of evolutionary breeding approach may be feasible inMusa.