EFFECTIVE INTROGRESSION OF qDTY3.1 AND qDTY2.1 TO GENETIC BACKGROUND OF A MODERN RICE VARIETY (ADT37) FOR FLOWERING STAGE DROUGHT TOLERANCE BASED ON DROUGHT TOLERANCE DEGREE
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Authors
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P. VIGNESH
Periyar University, Salem, Tamil Nadu), Velur-638182, Namakkal (District), Tamil Nadu, INDIA
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S. SUNITHA
Periyar University, Salem, Tamil Nadu), Velur-638182, Namakkal (District), Tamil Nadu, INDIA
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M. KARTHIKA
Periyar University, Salem, Tamil Nadu), Velur-638182, Namakkal (District), Tamil Nadu, INDIA
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S. BHARATHKUMAR
Periyar University, Salem, Tamil Nadu), Velur-638182, Namakkal (District), Tamil Nadu, INDIA
Keywords:
ADT37, backcrossing,, dry season pressure, dry spell resilience degree, Heterosis,, Leaf drying, qDTY3.1, DTY2.1Abstract
Dry spell pressure is one of the overwhelming abiotic burden in downpour took care of low and upland rice framework. In the current review, a generally cultivable present day rice assortment (ADT37) was improved for dry spell resilience at conceptive stage by consolidating qDTY3.1 and qDTY2.1 locus through marker helped backcross technique during the extended period of 2021- 23. At sub-atomic level, polymorphism was affirmed between beneficiary (ADT37) and giver parent (IR 81869 B-195) with assistance of straightforward arrangement rehash marker. Here, the quality of leaf rolling and leaf drying was utilized to choose positive dry spell plants from backcrossed populace of every age utilizing IRRI’s scale. Plus, plants which are like intermittent parent (RP) at morphological level were additionally browsed chosen positive plants to backcross with RP at every age. Thusly, various ten, eight and nine positive plants were chosen from F1, BC1F1 and BC2F1 populace separately, in view of its elevated degree of dry spell resilience degree (DTD) and heterosis for the quality of leaf drying followed by dry season pressure at vegetative stage. Finally, various two positive plants vagabond ring both qDTY3.1 and qDTY2.1 with heterozygous allelic condition was distinguished from BC3F1 populace utilizing forefront marker (RM520 and RM521) at before self-fertilization. In future, the created close isogonics lines (NILs) of ADT37 rice assortment for the dry season resilience at regenerative stage in view of serious level of dry spell resistance and heterosis would be more powerful under startling high water shortage circumstance to build the grain yield of rice.
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