Inheritance of seed dormancy in Tibetan semi-wild wheat accession Q1028

• Autorzy: Lan X J , Wei Y M , Liu D C , Yan Z H , Zheng Y L
• Języki publikacji: EN

Abstrakty

EN

Tibetan semi-wild wheat (Triticum aestivum ssp. tibetanum Shao) is one of the Chinese endemic hexaploid wheat genetic resources, distributed only in the Qinghai-Xizang Plateau of China. It has special characters, such as a hulled glume and spike disarticulation. However, seed dormancy, another important character for wheat resistance to pre-harvest sprouting, was rarely reported. Seed dormancy of more than 10 Tibetan semi-wild wheat accessions was evaluated, and their germinations were 0% or near 0% with both treatments of threshed seeds and intact spikes at hard dough stage. Tibetan semi-wild wheat accession Q1028 was investigated for its seed dormant characters by testing the seed germination percentages of intact spikes, seeds with bract powder, normal seeds, seeds with pierced coat, and sectioned embryos. It was observed that embryo dormancy of Q1028 accounted for its seed dormancy. Using threshed seeds and intact spikes at hard dough stage, the inheritance of seed dormancy was carried out using the F₁, F₂, F₃ and F₂BC₁ populations of the cross between Q1028 and a wheat line 88-1643, susceptible to preharvest sprouting. The germinations of seeds and intact spikes in F₁ plants were 1.0% and 0.9%, respectively. It indicated that seed dormancy of Q1028 was inherited as a dominant trait. From the genetic analysis of the F₂, F₃ and F₂BC₁ populations it was found that the strong seed dormancy of Q1028 was controlled by two dominant genes.

Słowa kluczowe

EN

inheritance; Triticum aestivum ssp.tibetanum; hexaploid wheat; Tibetan semi-wild wheat; wheat; China; semi-wild wheat; Qinghai-Xizang Plateau; preharvest sprouting; seed dormancy; plant breeding

• Wydawca: -
• Czasopismo: Journal of Applied Genetics
• Rocznik: 2005
• Tom: 46
• Numer: 2
• Opis fizyczny: p.133-138,fig.,ref.

Twórcy

autor

Lan X J

• Triticeae Research Institute, Sichuan Agricultural University, Dujiangyan City 611830, Sichuan, P.R. China

autor

Wei Y M

• Triticeae Research Institute, Sichuan Agricultural University, Dujiangyan City 611830, Sichuan, P.R. China

autor

Liu D C

• Triticeae Research Institute, Sichuan Agricultural University, Dujiangyan City 611830, Sichuan, P.R. China

autor

Yan Z H

• Triticeae Research Institute, Sichuan Agricultural University, Dujiangyan City 611830, Sichuan, P.R. China

autor

Zheng Y L

• Triticeae Research Institute, Sichuan Agricultural University, Dujiangyan City 611830, Sichuan, P.R. China

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