EVALUATION OF THE ADAPTIVE POTENTIAL OF PROMISING SHALLOT ACCESSIONS

O. M. Bilenka, T. M. Horhan, I. Pidlubenko, O. Ovchinnikova, L. Y. Shtepa
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Abstract

Ecological stability and high adaptive potential are the main factors for stable performance and yield of agricultural crops under changing environmental conditions; therefore the selection of stress-resistant genotypes is relevant at all stages of breeding. Purpose. To evaluate and select promising breeding accession of shallots by adaptive potential for the "green leaf yield" trait and its components. Methods. Field, laboratory, computational and analytical methods were used in the study. The study was conducted in outdoors at the Institute of Vegetable and Melon Growing of NAAS in 2017–2020. Five breeding hybrid accessions were investigated. Lira was the check variety. Results. Having assessed the adaptive potentials of 5 breeding accessions of shallot, we selected a promising environmentally stable accession, D-57, which was noticeable for a high yield of green leaves (5.6 kg/m2) in combination with the highest general adaptive capacity (GAC = 1.3), high stability (bi = 0.4) and genomic breeding value (GBV = 2.7) for this trait. As to the adaptive potential for the "plant height" trait, the D-57 accessions also stood out; it was characterized by high general adaptive capacity (GAC = 1.3), relative stability (Sgi = 10.9 %) and genomic breeding value (GBV = 23.4). This accession was also the best in terms of the "plant weight": trait with the genomic breeding value (GBV = 42.4), it had the largest plant weight including a bulb (75.4 g), combined high general (GAC = 17.3) and specific adaptive capacity (SAC= 129.3) with high plasticity (bi = 2.6). Conclusions. The comprehensive study of the adaptive potential of 5 promising forms of shallots distinguished the D-57 accession, which was superior to the check variety, Lira, in terms of green leaf yield, plant height and weight (including a bulb) and had a high adaptive potential and genomic breeding value for these traits.
前景青葱品种适应潜力评价
生态稳定性和高适应潜力是变化环境条件下农作物稳定生产性能和产量的主要因素;因此,抗逆性基因型的选择在育种的各个阶段都是相关的。目的。利用青葱“绿叶产量”性状及其构成因素的适应势,评价和选择有潜力的青葱育种品种。方法。研究中采用了现场、实验室、计算和分析方法。该研究于2017-2020年在中国科学院蔬菜和甜瓜种植研究所进行。对5个选育杂交种进行了调查。里拉是支票品种。结果。通过对5个大葱选育材料的适应潜力进行评估,我们选择了一个环境稳定的选育材料D-57,它具有较高的绿叶产量(5.6 kg/m2)、最高的一般适应能力(GAC = 1.3)、高的稳定性(bi = 0.4)和基因组育种价值(GBV = 2.7)。在“株高”性状的适应潜力方面,D-57材料也表现突出;具有较高的一般适应能力(GAC = 1.3)、相对稳定性(Sgi = 10.9%)和基因组育种价值(GBV = 23.4)。该品种在“株重”性状方面也表现最好:该性状具有基因组育种价值(GBV = 42.4),其株重最大,包括一个鳞茎(75.4 g),综合高一般适应能力(GAC = 17.3)和特定适应能力(SAC= 129.3),可塑性高(bi = 2.6)。结论。综合分析5个葱品种的适应潜力,发现D-57品种在绿叶产量、株高和重量(含鳞茎)方面均优于对照品种里拉,具有较高的适应潜力和基因组育种价值。
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