Characterising variation in wheat traits under hostile soil conditions in India.
Characterising variation in wheat traits under hostile soil conditions in India.
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DOI：
10.1371/journal.pone.0179208
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发表时间：
2017
期刊：
影响因子：
3.7
通讯作者：
Broadley MR
中科院分区：
文献类型：
--
作者：
Khokhar JS;Sareen S;Tyagi BS;Singh G;Chowdhury AK;Dhar T;Singh V;King IP;Young SD;Broadley MR
密集的作物育种提高了印度的小麦产量和产量。在印度，小麦改良通常涉及在区域范围内选择非敌意土壤条件下的产量和构成性状。本研究的目的是量化G*E对产量和构成性状的互作，以进一步探索恶劣土壤的特定地点性状选择。2013-14年和2014-15年在印度三个农业气候区的六个地点(PH值范围为4.5-9.5)进行了田间试验。在每个地点，对36个代表来自不同地区广泛遗传背景的优良品种的产量和构成性状进行了测量。不利和非不利地点的平均粮食产量分别为1.0~5.5tha-1。E位对产量和构成性状的影响最大，而G*E位和G*E位的互作对大多数性状的影响大于单独的基因型。在每个农业气候区内，敌对和非敌对地点之间的产量和构成性状呈正相关。然而，一些基因型在恶劣的土壤中表现得更好，产量和构成性状之间存在特定地点的关系，这支持了正在进行的特定地点选择活动的价值。
Intensive crop breeding has increased wheat yields and production in India. Wheat improvement in India typically involves selecting yield and component traits under non-hostile soil conditions at regional scales. The aim of this study is to quantify G*E interactions on yield and component traits to further explore site-specific trait selection for hostile soils. Field experiments were conducted at six sites (pH range 4.5–9.5) in 2013–14 and 2014–15, in three agro-climatic regions of India. At each site, yield and component traits were measured on 36 genotypes, representing elite varieties from a wide genetic background developed for different regions. Mean grain yields ranged from 1.0 to 5.5 t ha-1 at hostile and non-hostile sites, respectively. Site (E) had the largest effect on yield and component traits, however, interactions between genotype and site (G*E) affected most traits to a greater extent than genotype alone. Within each agro-climatic region, yield and component traits correlated positively between hostile and non-hostile sites. However, some genotypes performed better under hostile soils, with site-specific relationships between yield and component traits, which supports the value of ongoing site-specific selection activities.