Zongo Adama, Konate Abdourasmane K, Koïta Kadidia, Sawadogo Mahamadou, Sankara Philippe, Ntare Bonny R, Desmae Haile
Environmental and Rural Development Sciences Institute (ERDSI), University of Dedougou, Dedougou BP 176, Burkina Faso;
Institut de l'Environnement et de la Recherche Agricole (INERA), Bobo Dioulasso BP 910, Burkina Faso;
Agronomy (Basel). 2019 Jan 1;9(1):15. doi: 10.3390/agronomy9010015.
Early leaf spot (ELS) is one of the major biotic constraints of groundnut production in West and Central Africa. A study using 6 × 6 F2 full diallel populations from six parents (NAMA, B188, PC79-79, QH243C, TS32-1, and CN94C) was conducted to assess the mode of inheritance of ELS resistance traits. The F2 and parents were grown in a randomized complete block design with three replications. Data was collected on ELS disease severity, and an area under disease progress curve (AUDPC) was estimated. The results revealed that additive and non-additive gene actions were involved in the inheritance of the ELS resistance traits, but additive gene action was predominant. Significant reciprocal cross effect was observed, suggesting cytoplasmic effect on ELS resistance. Graphical analysis also revealed the predominance of additive gene action for ELS resistance. The results suggest that early generation selection should be effective for ELS resistance. Looking at the distribution of array points along with the regression line, parental lines NAMA, PC79-79, and B188 would be suitable as good donors in an ELS disease resistance breeding program.
早期叶斑病（ELS）是西部和中部非洲花生生产的主要生物限制因素之一。利用来自六个亲本（NAMA、B188、PC79-79、QH243C、TS32-1和CN94C）的6×6 F2完全双列杂交群体进行了一项研究，以评估ELS抗性性状的遗传模式。F2代和亲本采用随机完全区组设计，重复三次种植。收集了ELS病害严重程度的数据，并估算了病害进展曲线下面积（AUDPC）。结果表明，加性和非加性基因作用均参与了ELS抗性性状的遗传，但加性基因作用占主导地位。观察到显著的正反交效应，表明细胞质对ELS抗性有影响。图形分析也揭示了ELS抗性中加性基因作用的主导地位。结果表明，早期世代选择对ELS抗性应该是有效的。从阵列点沿回归线的分布来看，亲本系NAMA、PC79-79和B188在ELS抗病育种计划中适合作为优良供体。
