Abstract
New plant type core set comprising indica and tropical japonica accessions along with checks were evaluated for yield and culm strength related traits and characterized with gene specific markers viz., Gn1a, DEP1, Ghd7, SPL14, GS5, TGW6 and SCM2. Analysis of variance revealed significant differences as well as presence of variability among the genotypes for all the traits. Seven genotypes (IRGC25510, IRGC1742, Haorei machang, Azhoghi, Thangmoi, BPT5204 and Swarnadhan) do not possess similar allele as that of the assessed genes based on combined analysis for all the traits and genes. Of them, four genotypes IRGC1742, Azhoghi, BPT5204 and Swarnadhan possess ideal trait combination (90–100 days to 50% flowering, 100–120 cm plant height, grain number of > 200, 11–15 productive tillers) but with weak culm can be ideal sources for identification of new genes for yield attributing traits and direct introgression of SCM2. Based on single trait-gene analysis, nine trait wise donors with high value for the trait (also with desirable plant type) but without similar allele of the corresponding gene were identified. One genotype IRGC7486 with high grain number (300), four genotypes (IRGC50448, IRGC43741, IRGC15147 and IRGC39111) with strong culm (1195–2655 g.f), three genotypes viz., IRGC15147, IRGC39111 and IRGC10658 with high panicle weight and one genotype Solumpiket with high 1000-grain weight and high panicle weight can be considered for identification of novel gene(s) for respective traits.
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Abbreviations
- ABD:
-
Augmented block design
- ICRIP:
-
All India Coordinated Rice Improvement Project
- ANOVA:
-
Analysis of variance
- CTAB:
-
Cetyl trimethyl ammonium bromide
- DFF:
-
Days to 50% flowering
- DMRT:
-
Duncan’s multiple range test
- GN:
-
Grain number
- ICAR-IIRR:
-
ICAR-Indian Institute of Rice Research
- LSD:
-
Least significant difference
- M:
-
Culm strength measured as bending moment at breaking stress
- MAS:
-
Marker assisted selection
- NPT:
-
New plant type
- PH:
-
Plant height
- PIC:
-
Polymorphic information content
- PL:
-
Panicle length
- PN:
-
Number of panicles or effective tiller number
- PW:
-
Panicle weight
- RBD:
-
Randomized block design
- SPY:
-
Single plant yield
- TN:
-
Tillers per plant
- TW:
-
Test weight
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Acknowledgements
The research work presented is part of the institute project-GEY/CI/BR/25: “Broadening the genetic base of indica rice and modify plant type by introgressing traits from Tropical japonica” operative at ICAR-Indian Institute of Rice Research. Authors are thankful to the Director, ICAR-Indian Institute of Rice Research, for providing all the necessary facilities, Dr. R.M. Sundaram for HY lines.
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Bagudam, R., Eswari, K.B., Badri, J. et al. Morphological and molecular characterization of new plant type core set for yield and culm strength traits in rice (Oryza sativa L.). J. Plant Biochem. Biotechnol. 30, 233–242 (2021). https://doi.org/10.1007/s13562-020-00581-w
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DOI: https://doi.org/10.1007/s13562-020-00581-w