| Autor: |
Kuijer, Hendrik N. J., Wang, Jian You, Bougouffa, Salim, Abrouk, Michael, Jamil, Muhammad, Incitti, Roberto, Alam, Intikhab, Balakrishna, Aparna, Alvarez, Derry, Votta, Cristina, Chen, Guan-Ting Erica, Martínez, Claudio, Zuccolo, Andrea, Berqdar, Lamis, Sioud, Salim, Fiorilli, Valentina, de Lera, Angel R., Lanfranco, Luisa, Gojobori, Takashi, Wing, Rod A. |
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| Zdroj: |
Nature Communications; 8/12/2024, Vol. 15 Issue 1, p1-12, 12p |
| Abstrakt: |
The yield of pearl millet, a resilient cereal crop crucial for African food security, is severely impacted by the root parasitic weed Striga hermonthica, which requires host-released hormones, called strigolactones (SLs), for seed germination. Herein, we identify four SLs present in the Striga-susceptible line SOSAT-C88-P10 (P10) but absent in the resistant 29Aw (Aw). We generate chromosome-scale genome assemblies, including four gapless chromosomes for each line. The Striga-resistant Aw lacks a 0.7 Mb genome segment containing two putative CARLACTONOIC ACID METHYLTRANSFERASE1 (CLAMT1) genes, which may contribute to SL biosynthesis. Functional assays show that P10CLAMT1b produces the SL-biosynthesis intermediate methyl carlactonoate (MeCLA) and that MeCLA is the precursor of P10-specific SLs. Screening a diverse pearl millet panel confirms the pivotal role of the CLAMT1 section for SL diversity and Striga susceptibility. Our results reveal a reason for Striga susceptibility in pearl millet and pave the way for generating resistant lines through marker-assisted breeding or direct genetic modification. Production of pearl millet is impacted by the root parasitic weed Striga hermonthica. Here, the authors assemble the genomes of resistant and susceptible lines of pearl millet and identify a critical gene CARLACTONOIC ACID METHYLTRANSFERASE1b (CLAMT1b) in determining Striga resistance. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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