Novel role of photoinsensitive alleles in adaptation of soybean [Glycine max (L.) Merr.] to rainfed short growing seasons of lower latitudes
| Autor: | Milind B. Ratnaparkhe, Rachana Tripathi, Subhash Chandra, Virender Singh Bhatia, Vangala Rajesh, Sanjay Gupta, Gyanesh K. Satpute, Nisha Agrawal, M.K. Kuchlan, Suresh Chand, Vennampally Nataraj, Giriraj Kumawat, Shivakumar Maranna, P. Kuchlan |
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| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
0301 basic medicine food and beverages Growing season Tropics Plant Science Biology 01 natural sciences Crop 03 medical and health sciences 030104 developmental biology Agronomy Genotype Genetics Temperate climate Adaptation Allele Agronomy and Crop Science Genotyping Ecology Evolution Behavior and Systematics 010606 plant biology & botany |
| Zdroj: | Genetic Resources and Crop Evolution. 68:2455-2467 |
| ISSN: | 1573-5109 0925-9864 |
| Popis: | Soybean is a temperate photosensitive crop but has adapted to sub-tropical and tropical countries of lower latitudes also. Photoperiodic and maturity genes confer latitudinal adaptation in this crop. Genotyping of accessions of higher latitudes have shown the role of photoinsensitivity, conferred by recessive photoperiodic alleles (e1/e2/e3/e4), in adaptation of the crop to high latitudes but information is not available for lower latitudinal countries like India. We genotyped and calculated the photosensitivity of 101 cultivated Indian soybean varieties and found that majority of the varieties (86) were photosensitive and had the dominant alleles at these loci. Four genotypic classes (e1-as/E2/E3/E4, E1/e2/e3/E4, E1/e2/E3/E4 and E1/E2/e3/E4) were observed for varieties with recessive alleles. Photoinsensitive alleles at E1 and E2 loci significantly reduced the days to flower, maturity and photosensitivity percentage. Adaptive role of photoperiodic alleles was inferred from breeder seed requirement of these varieties for 35 years. Although the photosensitive class contributed 81% to the total seed requirement the weighted mean contribution of this class (380 Q/year) was far less than that of photoinsensitive class (648 Q/year). Photoinsensitivity is essential for perpetuation of crop in higher latitudes. Present report highlights the novel role of photoinsensitive alleles in adaptation of soybean to rainfed, short growing and sub-tropical conditions of lower latitudes by conferring earliness. |
| Databáze: | OpenAIRE |
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