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Characterization of the Durum Wheat-Aegilops tauschii 4D(4B) Disomic Substitution Line YL-443 With Superior Characteristics of High Yielding and Stripe Rust Resistance

文献类型： 外文期刊

作者： Yang, Fan 1 ; Liu, Qier 3 ; Wang, Qin 2 ; Yang, Ning 2 ; Li, Jun 2 ; Wan, Honshen 2 ; Liu, Zehou 2 ; Yang, Sujie 2 ; Wang, Y 1 ;

作者机构： 1.Sichuan Agr Univ, Triticeae Res Inst, Chengdu, Peoples R China

2.Sichuan Acad Agr Sci SAAS, Crop Res Inst, Chengdu, Peoples R China

3.Murdoch Univ, Coll Sci Hlth Engn & Educ, Australia China Joint Ctr Wheat Improvement, Western Australian State Agr Biotechnol Ctr, Perth, WA, Australia

4.Jiangsu Acad Agr Sci JAAS, Inst Germplasm Resources & Biotechnol, Nanjing, Peoples R China

5.Minist Agr, Key Lab Wheat Biol & Genet Improvement Southweste, Chengdu, Peoples R China

6.Sichuan Acad Agr Sci SAAS, Inst Biotechnol & Nucl Technol Res, Chengdu, Peoples R China

关键词： durum wheat; Aegilops tauschii; substitution; pentaploidy; supernumerary spikelets; stripe rust; interspecific hybridization

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.754； 五年影响因子：6.612 ）

ISSN： 1664-462X

年卷期： 2021 年 12 卷

页码：

收录情况： SCI

摘要： Durum wheat is one of the important food and cash crops. The main goals in current breeding programs are improving its low yield potential, kernel characteristics, and lack of resistance or tolerance to some biotic and abiotic stresses. In this study, a nascent synthesized hexaploid wheat Lanmai/AT23 is used as the female parent in crosses with its AB genome donor Lanmai. A tetraploid line YL-443 with supernumerary spikelets and high resistance to stripe rust was selected out from the pentaploid F-7 progeny. Somatic analysis using multicolor fluorescence in situ hybridization (mc-FISH) revealed that this line is a disomic substitution line with the 4B chromosome pair of Lanmai replaced by the 4D chromosome pair of Aegilops tauschii AT23. Comparing with Lanmai, YL-443 shows an increase in the number of spikelets and florets per spike by 36.3 and 75.9%, respectively. The stripe rust resistance gene Yr28 carried on the 4D chromosome was fully expressed in the tetraploid background. The present 4D(4B) disomic substitution line YL-443 was distinguished from the previously reported 4D(4B) lines with the 4D chromosomes from Chinese Spring (CS). Our study demonstrated that YL-443 can be used as elite germplasm for durum wheat breeding targeting high yield potential and stripe rust resistance. The Yr28-specific PCR marker and the 4D chromosome-specific KASP markers together with its unique features of pubescent leaf sheath and auricles can be utilized for assisting selection in breeding.

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