CLAVATA signaling pathway genes modulating flowering time and flower number in chickpea
| Autor: | Swarup K. Parida, Naveen Malik, Virevol Thakro, Laxmi Narnoliya, Rishi Srivastava, Akash Sharma, Deepak Bajaj, Vinay Hegde, Akhilesh K. Tyagi, Udita Basu, Hari D. Upadhyaya, Shailesh Tripathi, Anurag Daware |
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| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Quantitative Trait Loci Introgression Flowers Biology Quantitative trait locus 01 natural sciences Phylogenetics Genetics Allele Gene Phylogeny Plant Proteins fungi Haplotype food and beverages Chromosome Mapping Membrane Proteins General Medicine Meristem Phenotype Cicer Haplotypes Agronomy and Crop Science Genome Plant 010606 plant biology & botany Biotechnology Signal Transduction |
| Zdroj: | TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik. 132(7) |
| ISSN: | 1432-2242 |
| Popis: | A combinatorial genomic strategy delineated functionally relevant natural allele of a CLAVATA gene and its marker (haplotype)-assisted introgression led to development of the early-flowering chickpea cultivars with high flower number and enhanced yield/productivity. Unraveling the genetic components involved in CLAVATA (CLV) signaling is crucial for modulating important shoot apical meristem (SAM) characteristics and ultimately regulating diverse SAM-regulated agromorphological traits in crop plants. A genome-wide scan identified 142 CLV1-, 28 CLV2- and 6 CLV3-like genes, and their comprehensive genomic constitution and phylogenetic relationships were deciphered in chickpea. The QTL/fine mapping and map-based cloning integrated with high-resolution association analysis identified SNP loci from CaCLV3_01 gene within a major CaqDTF1.1/CaqFN1.1 QTL associated with DTF (days to 50% flowering) and FN (flower number) traits in chickpea, which was further ascertained by quantitative expression profiling. Molecular haplotyping of CaCLV3_01 gene, expressed specifically in SAM, constituted two major haplotypes that differentiated the early-DTF and high-FN chickpea accessions from late-DTF and low-FN. Enhanced accumulation of transcripts of superior CaCLV3_01 gene haplotype and known flowering promoting genes was observed in the corresponding haplotype-introgressed early-DTF and high-FN near-isogenic lines (NILs) with narrow SAM width. The superior haplotype-introgressed NILs exhibited early-flowering, high-FN and enhanced seed yield/productivity without compromising agronomic performance. These delineated molecular signatures can regulate DTF and FN traits through SAM proliferation and differentiation and thereby will be useful for translational genomic study to develop early-flowering cultivars with enhanced yield/productivity. |
| Databáze: | OpenAIRE |
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