論文

査読有り
2017年6月

Differential responses of grain yield, grain protein, and their associated traits to nitrogen supply in soft red winter wheat

JOURNAL OF PLANT NUTRITION AND SOIL SCIENCE
  • Bishal G. Tamang
  • ,
  • Kyle G. Brasier
  • ,
  • Wade E. Thomason
  • ,
  • Carl A. Griffey
  • ,
  • Takeshi Fukao

180
3
開始ページ
316
終了ページ
325
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1002/jpln.201600312
出版者・発行元
WILEY-V C H VERLAG GMBH

Increased application of nitrogen fertilizers has significantly raised grain yield and protein concentration in wheat. However, only 30-50% of applied fertilizer nitrogen are usually utilized by the plant. In this study, four soft red winter wheat genotypes (Triticum aestivum L., IL07-4415, MD05W10208-11-8, OH06-150-57 and Sisson) were grown under three different nitrogen regimes (high, medium, and low) in a greenhouse, and grain yield, grain protein concentration, nitrogen use efficiency (NUE) and their associated traits were evaluated. Among the four genotypes, a high-yielding cultivar, Sisson, exhibited superior performance in terms of grain weight plant(-1) and NUE for yield (NUEY) at low nitrogen due to maintained grain number spike(-1) and harvest index. Significant yield losses due to nitrogen limitation were attributable to reduced spike number plant(-1) and grain number spike(-1) in the other genotypes. Interestingly, a linear relationship between NUEY and NUE for grain protein (NUEP) was detected at high (R-2 = 0.67) and low (R-2= 0.42) nitrogen; both of these traits were positively correlated with grain number spike(-1), 1000-seed weight, and harvest index under nitrogen-limited conditions (R-2 = 0.35-0.48). These results suggest that simultaneous improvement of NUEY and NUEP could be achieved through the selection of the three yield components (grain number spike(-1), 1000-seed weight, and harvest index) at low nitrogen.

Web of Science ® 被引用回数 : 8

リンク情報
DOI
https://doi.org/10.1002/jpln.201600312
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000402670100006&DestApp=WOS_CPL

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