Limited contribution of water availability in genotype-by-environment interaction in sugarcane yield and yield components
文献类型： 外文期刊
作者： Natarajan, Sijesh 1 ; Basnayake, Jaya 2 ; Lakshmanan, Prakash 3 ; Fukai, Shu 1 ;
作者机构： 1.Univ Queensland, Sch Agr & Food Sci, St Lucia, Qld, Australia
2.Sugar Res Australia Ltd, Brandon, Qld, Australia
3.Guangxi Acad Agr Sci, Sugarcane Res Inst, Nanning 530007, Guanxi, Peoples R China
4.Southwest Univ, Coll Resources & Environm, Interdisciplinary Res Ctr Agr Green Dev Yangtze R, Chongqing, Peoples R China
5.Univ Queensland, Queensland Alliance Agr & Food Innovat, St Lucia, Qld, Australia
关键词： genotype x environment interaction; GGE biplot; plant breeding; sugarcane; water stress; water-use efficiency
期刊名称：JOURNAL OF AGRONOMY AND CROP SCIENCE （ 影响因子：3.473； 五年影响因子：4.395 ）
ISSN： 0931-2250
年卷期：
页码：
收录情况： SCI
摘要： Water deficit is an important abiotic stress factor limiting sugarcane production. Understanding the effect of water deficit on cane yield, yield components and genotype x environment (G x E) interaction can aid in selecting genotypes that are adapted to water deficit conditions. In this study, response of cane yield and yield components of 10 sugarcane genotypes grown under 3 irrigation treatments-fully irrigated, semi-irrigated and rainfed-was examined across 3 locations and 3 crop-years within each location. Cane yield reduced by 32% and 9% in the rainfed and semi-irrigated treatments, respectively, compared to the fully irrigated treatment. Genotypic variation was highly significant for cane yield and yield components in all three irrigation regimes. Cane yield in the rainfed treatment showed significant genetic correlation with stalk diameter (r(g) = 0.68), leaf number (r(g) = 0.64), node number (r(g) = 0.67) and stalk number (r(g) = 0.68). Genotype x irrigation variance was negligible compared to genotype, genotype x location and genotype x crop-year variances. Commercial genotypes had higher yield in most environments except in low-yield potential environments, which caused a significant genotype x location x irrigation effect, suggesting opportunities for improving sugarcane productivity in these environments.
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