Relationship between carbon isotope discrimination and grain yield of rainfed winter wheat in a semi-arid region

Autor: Robert M. Aiken, Guorong Zhang, Terry J. Martin
Rok vydání: 2014
Předmět:
Zdroj: Euphytica. 204:39-48
ISSN: 1573-5060
0014-2336
DOI: 10.1007/s10681-014-1335-6
Popis: Carbon isotope discrimination (CID) has been suggested as an indirect selection criterion for grain yield under drought stress in wheat (Triticum aestivum L.). However, the association between CID and grain yield varies greatly among different studies. In this study, conducted in western Kansas, a temperate semi-arid region, the genetic variation of grain CID and its association with grain yield and other agronomic traits were examined using 43 preliminary and 15 advanced breeding lines under dryland conditions. The 43 preliminary breeding lines were tested in three environments while the 15 advanced breeding lines were tested in one environment. Results showed that both preliminary and advanced breeding lines had significant genetic variations and relatively small coefficients of variation in grain CID, indicating grain CID as a promising trait for selection in wheat breeding programs. In the trials for the preliminary breeding lines, the association between grain CID and grain yield was significant (P
Databáze: OpenAIRE
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