Abstract
Tiller angle, an important agronomic trait, contributes to crop production and plays a vital role in breeding for plant architecture. A barley line V-V-HD, which has prostrate tillers during vegetative growth and erect tillers after booting, is considered the ideal type for repressing weed growth and increasing leaf area during early growth. Genetic analysis identified that the prostrate trait in V-V-HD is controlled by a single gene. A double haploid population with 208 lines from V-V-HD × Buloke was used to map the prostrate growth gene. Ninety-six SNP markers were used for primary mapping, and subsequently, SSR and InDel markers were used for fine mapping. The gene was fine-mapped to a 3.53 Mb region on chromosome 3HL between the markers InDelz3028 and InDelz3032 with 52 candidate genes located in this region. Gene annotation analysis of the 52 genes within the target region indicated that a gene involved in zinc-ion binding (gene ID HORVU3Hr1G090910) is likely to be the candidate gene for prostrate growth in V-V-HD, and is linked to the denso/sdw gene. Association analysis showed that prostrate plants were shorter, flowered later.
Highlights
Barley (Hordeum vulgare L.) (2n = 14) is among the world’s earliest domesticated cereal crops [1]
Didon [11] and Tan et al [10] indicated that the prostrate growth habit could conserve water repress weed growth, occupy more space at seedling stage, and have higher photosynthetic efficiency, stronger trampling tolerance, which generally results in high yield
The present study showed that barley with a prostrate growth habit had lower grain yields and flowered later than those with an erect growth habit (Fig 2e)
Summary
Barley (Hordeum vulgare L.) (2n = 14) is among the world’s earliest domesticated cereal crops [1]. The ideotype breeding might be an effective strategy to further improve crop yield in the future [6,7]. Tiller angle is an important trait for ideal plant architecture as it can significantly affect grain yield [8,9,10]. Such genotypes occupy more space to increase photosynthetic efficiency, and the dwarf plants are more tolerant trampling than the taller ones [10]. The dynamic tiller angle during a plant’s life cycle can improve the efficiency of water utilization.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
