globalchange  > 气候变化与战略
DOI: 10.1016/j.fcr.2020.107742
论文题名:
Grain yield genetic gains and changes in physiological related traits for CIMMYT's High Rainfall Wheat Screening Nursery tested across international environments
作者: Gerard G.S.; Crespo-Herrera L.A.; Crossa J.; Mondal S.; Velu G.; Juliana P.; Huerta-Espino J.; Vargas M.; Rhandawa M.S.; Bhavani S.; Braun H.; Singh R.P.
刊名: Field Crops Research
ISSN: 3784290
出版年: 2020
卷: 249
语种: 英语
英文关键词: Genetic gains ; Grain yield ; High Rainfall Wheat Screening Nursery ; Physiological components ; Triticum aestivum L.
Scopus关键词: agrometeorology ; climate effect ; crop yield ; ecophysiology ; food security ; genetic analysis ; genotype-environment interaction ; germplasm ; nursery ground ; physiological response ; precipitation intensity ; wheat ; Triticum aestivum
英文摘要: The effects of climate change together with the projected future demand represents a huge challenge for wheat production systems worldwide. Wheat breeding can contribute to global food security through the creation of genotypes exhibiting stress tolerance and higher yield potential. The objectives of our study were to (i) estimate the annual grain yield (GY) genetic gain of High Rainfall Wheat Yield Trials (HRWYT) grown from 2007 (15th HRWYT) to 2016 (24th HRWYT) across international environments, and (ii) determine the changes in physiological traits associated with GY genetic improvement. The GY genetic gains were estimated as genetic progress per se (GYP) and in terms of local checks (GYLC). In total, 239 international locations were classified into two groups: high- and low-rainfall environments based on climate variables and trial management practices. In the high-rainfall environment, the annual genetic gains for GYP and GYLC were 3.8 and 1.17 % (160 and 65.1 kg ha−1 yr−1), respectively. In the low-rainfall environment, the genetic gains were 0.93 and 0.73 % (40 and 33.1 kg ha−1 yr−1), for GYP and GYLC respectively. The GY of the lines included in each nursery showed a significant phenotypic correlation between high- and low-rainfall environments in all the examined years and several of the five best performing lines were common in both environments. The GY progress was mainly associated with increased grain weight (R2 = 0.35 p < 0.001), days to maturity (R2 = 0.20, p < 0.001) and grain filling period (R2 = 0.06, p < 0.05). These results indicate continuous GY genetic progress and yield stability in the HRWYT germplasm developed and distributed by CIMMYT. © 2020 The Authors
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158495
Appears in Collections:气候变化与战略

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作者单位: Department of Plant Sciences and Crop Development Centre, University of Saskatchewan, 51 Campus Dr., Saskatoon, SK S7N 5A8, Canada; Centro Internacional de Mejoramiento de Maíz y Trigo (CIMMYT), Global Wheat Program, Apdo. 0660, Mexico City, Mexico; INIFAP, Campo Experimental Valle de Mexico, Apdo. Postal 10, Chapingo, Texcoco, 56230, Mexico; Universidad Autónoma Chapingo, Carretera Mexico-Texcoco Km. 38.5, Chapingo, Texcoco, 56230, Mexico; Centro Internacional de Mejoramiento de Maíz y Trigo (CIMMYT), Nairobi, Kenya

Recommended Citation:
Gerard G.S.,Crespo-Herrera L.A.,Crossa J.,et al. Grain yield genetic gains and changes in physiological related traits for CIMMYT's High Rainfall Wheat Screening Nursery tested across international environments[J]. Field Crops Research,2020-01-01,249
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