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Adaptation patterns of sixteen alfalfa (Medicago sativa L.) cultivars across contrasting environments of Algeria and implications for the crop improvement
Italian Journal of Agronomy ( IF 2.6 ) Pub Date : 2020-03-12 , DOI: 10.4081/ija.2020.1578
Chahira Achir , Paolo Annicchiarico , Luciano Pecetti , Houssem-Eddine Khelifi , Mahfoud M’Hammedi-Bouzina , Aissa Abdelguerfi , Meriem Laouar

The additive main effects and multiplicative interaction analysis was applied to assess the genotype × environment interaction (GEI) effects and stability for 4-year dry matter yield (DMY) of 16 alfalfa (Medicago sativa L.) cultivars of diversified geographic origin grown in four Algerian environments given by the combination of two water managements (rainfed and irrigated) and two evaluation sites, viz. the sub-humid location of Alger and the semi-arid, salinity-affected site of Hmadna. The analysis of variance (ANOVA) revealed significant variation among cultivars and environments (P<0.001). The GEI was significant (P<0.001) and the environment main effect had greater influence than the genotype effect on long-term yield according to ANOVA. Rainfed conditions had 41.6% and 48.5% lower yield than the irrigated ones in Alger and Hmadna, respectively. Alfalfa cropping in the semiarid location caused lower DMY than in the sub-humid one (–38.0% under irrigated and –45.2% under rainfed conditions) and a slightly lower persistence over the 4-year period. Outstanding environment-specific cultivar responses were observed, fully justifying the large GEI effects, although the Italian cultivar Sicilian ecotype had remarkable yield stability and good mean yield. The American variety Ameristand 801S and the Moroccan landrace Erfoud 1 were the most salt-tolerant cultivars. The evaluated germplasm, and particularly some exotic cultivars, could be used as parents to breed new varieties more adapted to drought and salinity in the Mediterranean basin.

中文翻译:

十六个苜蓿(Medicago sativa L.)品种在阿尔及利亚不同环境中的适应模式及其对作物改良的影响

应用加性主效应和乘性相互作用分析来评估基因型 × 环境相互作用 (GEI) 效应和 4 年干物质产量 (DMY) 的稳定性,其中 16 个不同地理来源的苜蓿 (Medicago sativa L.) 栽培品种在四个地区种植阿尔及利亚环境由两种水资源管理(雨养和灌溉)和两个评估地点相结合,即。阿尔及尔的半湿润地区和 Hmadna 的半干旱、受盐分影响的地区。方差分析(ANOVA)显示栽培品种和环境之间存在显着差异(P<0.001)。根据方差分析,GEI 显着(P<0.001)并且环境主效应比基因型效应对长期产量的影响更大。在阿尔及尔和哈马德纳,雨养条件的产量比灌溉条件低 41.6% 和 48.5%,分别。在半干旱地区种植苜蓿导致 DMY 低于半湿润地区(灌溉条件下为 –38.0%,雨养条件下为 –45.2%),并且在 4 年期间的持续性略低。尽管意大利品种西西里生态型具有显着的产量稳定性和良好的平均产量,但观察到突出的环境特异性品种反应,充分证明了大的 GEI 效应。美国品种 Ameristand 801S 和摩洛哥地方品种 Erfoud 1 是最耐盐的品种。评估的种质,特别是一些外来品种,可作为亲本培育更适应地中海盆地干旱和盐碱的新品种。2% 在雨养条件下)和在 4 年期间的持续性略低。尽管意大利品种西西里生态型具有显着的产量稳定性和良好的平均产量,但观察到突出的环境特异性品种反应,充分证明了大的 GEI 效应。美国品种 Ameristand 801S 和摩洛哥地方品种 Erfoud 1 是最耐盐的品种。评估的种质,特别是一些外来品种,可作为亲本培育更适应地中海盆地干旱和盐碱的新品种。2% 在雨养条件下)和在 4 年期间的持续性略低。尽管意大利品种西西里生态型具有显着的产量稳定性和良好的平均产量,但观察到突出的环境特异性品种反应,充分证明了大的 GEI 效应。美国品种 Ameristand 801S 和摩洛哥地方品种 Erfoud 1 是最耐盐的品种。评估的种质,特别是一些外来品种,可作为亲本培育更适应地中海盆地干旱和盐碱的新品种。美国品种 Ameristand 801S 和摩洛哥地方品种 Erfoud 1 是最耐盐的品种。评估的种质,特别是一些外来品种,可作为亲本培育更适应地中海盆地干旱和盐碱的新品种。美国品种 Ameristand 801S 和摩洛哥地方品种 Erfoud 1 是最耐盐的品种。评估的种质,特别是一些外来品种,可作为亲本培育更适应地中海盆地干旱和盐碱的新品种。
更新日期:2020-03-12
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