Improving Grain Yield via Promotion of Kernel Weight in High Yielding Winter Wheat Genotypes
Improving plant net photosynthetic rates and accelerating water-soluble carbohydrate accumulation play an important role in increasing the carbon sources for yield formation of wheat (<i>Triticum aestivum</i> L.). Understanding and quantify the contribution of these traits to grain yield...
| Κύριοι συγγραφείς: | , , |
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| Μορφή: | Άρθρο |
| Γλώσσα: | English |
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MDPI AG
2021-12-01
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| Σειρά: | Biology |
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| Διαθέσιμο Online: | https://www.mdpi.com/2079-7737/11/1/42 |
| _version_ | 1827666616001757184 |
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| author | Cong Zhang Bangyou Zheng Yong He |
| author_facet | Cong Zhang Bangyou Zheng Yong He |
| author_sort | Cong Zhang |
| collection | DOAJ |
| description | Improving plant net photosynthetic rates and accelerating water-soluble carbohydrate accumulation play an important role in increasing the carbon sources for yield formation of wheat (<i>Triticum aestivum</i> L.). Understanding and quantify the contribution of these traits to grain yield can provide a pathway towards increasing the yield potential of wheat. The objective of this study was to identify kernel weight gap for improving grain yield in 15 winter wheat genotypes grown in Shandong Province, China. A cluster analysis was conducted to classify the 15 wheat genotypes into high yielding (HY) and low yielding (LY) groups based on their performance in grain yield, harvest index, photosynthetic rate, kernels per square meter, and spikes per square meter from two years of field testing. While the grain yield was significantly higher in the HY group, its thousand kernel weight (TKW) was 8.8% lower than that of the LY group (<i>p</i> < 0.05). A structural equation model revealed that 83% of the total variation in grain yield for the HY group could be mainly explained by TKW, the flag leaf photosynthesis rate at the grain filling stage (Pn75), and flag leaf water-soluble carbohydrate content (WSC) at grain filling stage. Their effect values on yield were 0.579, 0.759, and 0.444, respectively. Our results suggest that increase of flag leaf photosynthesis and WSC could improve the TKW, and thus benefit for developing high yielding wheat cultivars. |
| first_indexed | 2024-03-10T01:54:13Z |
| format | Article |
| id | doaj.art-a2dd39a29fb142978f520d2245f01f76 |
| institution | Directory Open Access Journal |
| issn | 2079-7737 |
| language | English |
| last_indexed | 2024-03-10T01:54:13Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Biology |
| spelling | doaj.art-a2dd39a29fb142978f520d2245f01f762023-11-23T13:00:10ZengMDPI AGBiology2079-77372021-12-011114210.3390/biology11010042Improving Grain Yield via Promotion of Kernel Weight in High Yielding Winter Wheat GenotypesCong Zhang0Bangyou Zheng1Yong He2Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences (CAAS), 12 Zhongguancun South Str., Beijing 100081, ChinaCSIRO Agriculture and Food, Queensland Biosciences Precinct, St. Lucia, Brisbane, QLD 4067, AustraliaInstitute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences (CAAS), 12 Zhongguancun South Str., Beijing 100081, ChinaImproving plant net photosynthetic rates and accelerating water-soluble carbohydrate accumulation play an important role in increasing the carbon sources for yield formation of wheat (<i>Triticum aestivum</i> L.). Understanding and quantify the contribution of these traits to grain yield can provide a pathway towards increasing the yield potential of wheat. The objective of this study was to identify kernel weight gap for improving grain yield in 15 winter wheat genotypes grown in Shandong Province, China. A cluster analysis was conducted to classify the 15 wheat genotypes into high yielding (HY) and low yielding (LY) groups based on their performance in grain yield, harvest index, photosynthetic rate, kernels per square meter, and spikes per square meter from two years of field testing. While the grain yield was significantly higher in the HY group, its thousand kernel weight (TKW) was 8.8% lower than that of the LY group (<i>p</i> < 0.05). A structural equation model revealed that 83% of the total variation in grain yield for the HY group could be mainly explained by TKW, the flag leaf photosynthesis rate at the grain filling stage (Pn75), and flag leaf water-soluble carbohydrate content (WSC) at grain filling stage. Their effect values on yield were 0.579, 0.759, and 0.444, respectively. Our results suggest that increase of flag leaf photosynthesis and WSC could improve the TKW, and thus benefit for developing high yielding wheat cultivars.https://www.mdpi.com/2079-7737/11/1/42wheatgrain yieldkernel weightphotosynthetic ratewater-soluble carbohydrate |
| spellingShingle | Cong Zhang Bangyou Zheng Yong He Improving Grain Yield via Promotion of Kernel Weight in High Yielding Winter Wheat Genotypes Biology wheat grain yield kernel weight photosynthetic rate water-soluble carbohydrate |
| title | Improving Grain Yield via Promotion of Kernel Weight in High Yielding Winter Wheat Genotypes |
| title_full | Improving Grain Yield via Promotion of Kernel Weight in High Yielding Winter Wheat Genotypes |
| title_fullStr | Improving Grain Yield via Promotion of Kernel Weight in High Yielding Winter Wheat Genotypes |
| title_full_unstemmed | Improving Grain Yield via Promotion of Kernel Weight in High Yielding Winter Wheat Genotypes |
| title_short | Improving Grain Yield via Promotion of Kernel Weight in High Yielding Winter Wheat Genotypes |
| title_sort | improving grain yield via promotion of kernel weight in high yielding winter wheat genotypes |
| topic | wheat grain yield kernel weight photosynthetic rate water-soluble carbohydrate |
| url | https://www.mdpi.com/2079-7737/11/1/42 |
| work_keys_str_mv | AT congzhang improvinggrainyieldviapromotionofkernelweightinhighyieldingwinterwheatgenotypes AT bangyouzheng improvinggrainyieldviapromotionofkernelweightinhighyieldingwinterwheatgenotypes AT yonghe improvinggrainyieldviapromotionofkernelweightinhighyieldingwinterwheatgenotypes |