| Autor: |
Miura, Emiko, Takahashi, Hidekazu, Watanabe, Akio, Ueda, Kenji, Kawamoto, Tomohiko, Sakurai, Kenji, Akagi, Hiromori |
| Předmět: |
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| Zdroj: |
Euphytica; Aug2024, Vol. 220 Issue 8, p1-10, 10p |
| Abstrakt: |
Rice quality has a major impact on its economic value, necessitating the breeding of high-quality grain varieties. In addition, varieties with superior germination and growth at low temperatures are required for direct sowing, which enables the low-cost production of rice. We developed Akikei770, a near-isogenic line from the high-quality, good-tasting cultivar Akitakomachi, carrying the qLTG3-1 gene from the Maratelli cultivar, which enhances low-temperature germinability. Although Akikei770 exhibited improved low-temperature germinability, it was inferior to Akitakomachi in appearance quality of brown rice and in eating quality of cooked rice. In Akikei770, a short arm region of up to 222 kb on chromosome 3 from Maratelli was introgressed, and only the qLTG3-1 gene exhibited polymorphisms within the coding region compared to Akitakomachi. The qLTG3-1 genotype was significantly associated with brown rice quality in the F2 population, which indicates that the qLTG3-1 gene was involved in this trait with no involvement of other chromosomal regions of Akikei770. The functional qLTG3-1 allele in Akikei770, encoding a hybrid glycine-rich protein (HyGRP) that is localized on the cell wall or membrane, enhanced the low-temperature germinability. Because a loss-of-function allele of qLTG3-1 increased the appearance quality of brown rice in a recessive manner, it was concluded that HyGRP, which enhances low-temperature germinability, has a pleiotropic effect that reduces the appearance quality of brown rice. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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