Abstract
The online version contains supplementary material available at 10.1007/s11032-021-01249-6.
Highlights
Common wheat (Triticum aestivum L.) is one of the most important food crops widely cultivated, and estimates suggest that the wheat production needs to increase 70% to fulfill future food demand
We found that spikelet density (SD), grain width (GW), and thousand grain weight (TGW) differed between 13F10 and Chuanmai 42 (CM42); the values of these traits were significantly lower in CM42 than in 13F10 (Table 1, Supplemental Fig. 1)
Significant Pearson’s correlation coefficients ranged from 0.40 to 0.74 (P < 0.01) for the Spike length (SL) trait and from 0.53 to 0.79 (P < 0.01) for the SD trait in the six different environments (Supplemental Table 1). These results suggest that these traits are typically quantitatively controlled and suitable for quantitative trait locus (QTL) mapping
Summary
Common wheat (Triticum aestivum L.) is one of the most important food crops widely cultivated, and estimates suggest that the wheat production needs to increase 70% to fulfill future food demand. Grain yield is determined by the number of spikes, grain number of per spike (GNS), and thousand grain weight (TGW). Among these factors, GNS and TGW are closely related to spike-related traits, such as SL, SD, grain length (GL) and grain width (GW) (Cao et al 2019). A lower SD usually leads to reduced SNS, decreasing yield production, while a higher SD increases the incidence of Fusarium head blight and pre-harvest sprouting (Huang et al 2018). Understanding the genetic basis of desirable traits is important for breeding cultivars that can adapt to diverse environments and cropping systems (Yu et al 2014a)
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