Effects of TaMTL -Edited Mutations on Grain Phenotype and Storage Component Composition in Wheat

Huali Tang, Shuangxi Zhang, Mei Yu, Ke Wang, Yang Yu, Yuliang Qiu, Yanan Chang, Zhishan Lin, Lipu Du, Daolin Fu, Zichao Li and Xingguo Ye
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Huali Tang: Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Shuangxi Zhang: Crop Research Institute, Ningxia Academy of Agri-Forestry Sciences, Yinchuan 750105, China
Mei Yu: Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Ke Wang: Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Yang Yu: School of Agriculture, Yangtze University, Jingzhou 434000, China
Yuliang Qiu: Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Yanan Chang: Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Zhishan Lin: Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Lipu Du: Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Daolin Fu: State Key Laboratory of Crop Biology, College of Agronomy, Shandong Agricultural University, Taian 271018, China
Zichao Li: College of Agronomy, China Agricultural University, Beijing 100193, China
Xingguo Ye: Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China

Agriculture, 2022, vol. 12, issue 5, 1-16

Abstract: Wheat nutrition and processing-quality are primarily based on the endosperm ingredients. However, the effect of embryos on grain traits and components remains unclear. In this study, we found that in the cross-pollinated and self-pollinated progenies of the four wheat mtl mutants ( mtl - A , mtl - AD , mtl - BD , and mtl - ABD ) the haploid induction rates were 0–15.6% and 0–14.1%, and the embryo abortion rates were 0–27.4% and 0–24.1%, respectively, in which mtl-A had no effect on haploid induction and embryo development. The embryoless grains (ELG) were comparable to the normal grains (NG) from mtl - AD , mtl - BD , and mtl - ABD in grain length, grain width and thousand-kernel weight, but the grain traits were significantly less than those in NG from mutant mtl-A . During grain filling period, mtl-ABD had similar ELG ratio and amount of starch granule (SG) and protein body (PB) in ELG and NG. At maturity stage, the morphological features of A-type and B-type SG in ELG were similar to those in NG in mtl mutants; however, amylose, gliadin, and glutenin contents were higher in ELG, and total starch, albumin and globulin contents were higher in NG. Our results clarified the effect of the wheat mtl mutants on haploid induction and grain traits and nutrition composition in this crop, and provided new clues for studying the development of embryo and endosperm and their interaction in plants.

Keywords: wheat TaMTL gene; haploid induction rate; grain botanic and quality traits (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2022
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