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Characterization of heterogeneity in popular rice landrace through field and molecular evaluation

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Title Characterization of heterogeneity in popular rice landrace through field and molecular evaluation
 
Creator K. Suman, P. Madhubabu, V. Jaldhani, Santosha Rathod, L.V. Subbarao, R.M. Sundaram, C.N. Neeraja
 
Subject Landrace, Rice, Heterogeneity, Variants, RM markers, Grain zinc
 
Description Not Available
Context
Identification and purification of the landrace Chittimuthyalu using stability and molecular heterozygosity can be useful for rice diversity.

Objectives
The present study reports the characterization of 12 genotypic variants of Chittimuthyalu in terms of (i) variation and correlation among agromorphological, grain quality and nutrient traits, viz., Zn and Fe; (ii) stability across years; and (iii) characterization and heterozygosity.

Methods
A total of twelve genotypic variants were identified based on field-level agromorphological observations in the Chittimuthyalu landrace. For identification of a stable genotypic variant for grain Zn, genotype by environment (G × E) interaction was analyzed across three years using additive main effects and multiplicative interaction (AMMI) model and genotype main effects plus G × E (GGE) model for multienvironment data analysis along with principal component analysis (PCA). Correspondingly, twenty-five high polymorphism information content (PIC) RM markers were used for the identification of molecular heterozygosity in landrace.

Results
Stepwise regression analysis of phenotype revealed the interdependence of zinc in polished rice (ZPR), iron in polished rice (IPR), and single plant yield (SPY) and the positive association of grain Zn with IPR and SPY. Based on GGE and AMMI analyses of the variants, MCM3 was found to be stable across the environments for ZPR. Out of 46% polymorphic RM markers, seven markers (RM10149, RM13347, RM21749, RM13263, RM10361, RM12276 and RM474) were heterozygous. Heterozygous alleles were observed in eight variants (MCM2, MCM3, MCM5, MCM6 MCM7, MCM8, MCM10 and MCM12). The polymorphic information content (PIC) of the markers ranged from 0.58 to 0.88, with an average of 0.64. The percentage of the most common allele frequencies ranged from 4.2 to 95.8 across the markers. RM13347 showed nine markersingle bondtrait associations with P ≤ 0.05 and R2 ranging from 2.3% to 14.3% with a mean of 7.74%.

Conclusions
The present study has revealed the inherent heterogeneity in landraces in terms of their agromorphological, yield-related and nutritional quality traits. A promising genetic stock (MCM3) was identified as a donor for high grain ZPR and was registered as genetic stock.

Implications
The identified genetic stock is being shared with breeders in the breeding programme and farmers for the multiplication of high grain Zn rice.
Not Available
 
Date 2024-04-29T12:10:19Z
2024-04-29T12:10:19Z
2023-12-01
 
Type Article
 
Identifier K. Suman, P. Madhubabu, V. Jaldhani, Santosha Rathod, L.V. Subbarao, R.M. Sundaram, C.N. Neeraja, Characterization of heterogeneity in popular rice landrace through field and molecular evaluation, Field Crops Research, Volume 304, 2023, 109181, ISSN 0378-4290, https://doi.org/10.1016/j.fcr.2023.109181
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/82422
 
Language English
 
Relation Not Available;
 
Publisher Elsevier