| Autor: |
Barik SR; ICAR-National Rice Research Institute, Cuttack 753006, India., Moharana A; ICAR-National Rice Research Institute, Cuttack 753006, India., Pandit E; Department of Biosciences and Biotechnology, Fakir Mohan University, Balasore 756020, India., Behera A; ICAR-National Rice Research Institute, Cuttack 753006, India., Mishra A; ICAR-National Rice Research Institute, Cuttack 753006, India.; College of Agriculture, Odisha University of Agriculture & Technology, Bhubaneswar 751003, India., Mohanty SP; ICAR-National Rice Research Institute, Cuttack 753006, India., Mohapatra S; ICAR-National Rice Research Institute, Cuttack 753006, India.; Environmental Science Laboratory, School of Applied Sciences, KIIT Deemed to be University, Bhubaneswar 751024, India., Sanghamitra P; ICAR-National Rice Research Institute, Cuttack 753006, India., Meher J; ICAR-National Rice Research Institute, Cuttack 753006, India., Pani DR; ICAR-National Bureau of Plant Genetic Resources, Base Center, Cuttack 753006, India., Bhadana VP; ICAR-Indian Institute of Agricultural Biotechnology, Ranchi 834003, India., Datt S; Indian Council of Agricultural Research, Krishi Bhavan, New Delhi 110001, India., Sahoo CR; College of Agriculture, Odisha University of Agriculture & Technology, Bhubaneswar 751003, India., Raj K R R; ICAR-National Rice Research Institute, Cuttack 753006, India., Pradhan SK; ICAR-National Rice Research Institute, Cuttack 753006, India.; Indian Council of Agricultural Research, Krishi Bhavan, New Delhi 110001, India. |
| Abstrakt: |
Reeta is a popular late-maturing high-yielding rice variety recommended for cultivation in the eastern Indian states. The cultivar is highly sensitive to submergence stress. Phosphorus deficiency is an additional constraint for realizing high yield. The quantitative trait loci (QTLs), Sub1 , for submergence and Pup1 for low phosphorus stress tolerance along with narrow-grained trait, GW5 were introgressed into the variety from the donor parent, Swarna-Sub1 through marker-assisted breeding. In addition, phenotypic selections for higher panicle weight, grain number, and spikelet fertility were performed in each segregating generation. Foreground selection detected the 3 target QTLs in 9, 8 and 7 progenies in the BC 1 F 1 , BC 2 F 1 , and BC 3 F 1 generation, respectively. Recurrent parent's genome recovery was analyzed using 168 SSR polymorphic markers. The foreground analysis in 452 BC 3 F 2 progenies showed five pyramided lines in homozygous condition for the target QTLs. No donor fragment drag was noticed in the Sub1 and GW5 QTLs carrier while a segmentwas observed in the Pup1 carrier chromosome. The developed lines were higher yielding, had submergence, and had low phosphorus stress-tolerance alongwith similar to the recipient parent in the studied morpho-quality traits. A promising pyramided line is released in the name of Reeta-Panidhan (CR Dhan 413) for the flood-prone areas of Odisha state. |
