Evaluating natural variation, heritability, and genetic advance of photosynthetic traits in rice ( Oryza sativa )

2021 ◽  
Author(s):  
Liana G. Acevedo‐Siaca ◽  
Robert Coe ◽  
W. Paul Quick ◽  
Stephen P. Long
Keyword(s):  
Oryza Sativa ◽  
Natural Variation ◽  
Genetic Advance ◽  
Photosynthetic Traits

scholarly journals Genome-Wide Association Study Unravels LRK1 as a Dark Respiration Regulator in Rice (Oryza sativa L.)

2020 ◽  
Vol 21 (14) ◽  
pp. 4930
Author(s):  
Mingnan Qu ◽  
Jemaa Essemine ◽  
Ming Li ◽  
Shuoqi Chang ◽  
Tiangen Chang ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Association Study ◽  
Natural Variation ◽  
Genome Wide Association Study ◽  
Oryza Sativa L ◽  
Dark Respiration ◽  
Genome Wide Association ◽  
Strong Positive Correlation ◽  
Diversity Panel ◽  
Genome Wide

Respiration is a major plant physiological process that generates adenosine triphosphate (ATP) to support the various pathways involved in the plant growth and development. After decades of focused research on basic mechanisms of respiration, the processes and major proteins involved in respiration are well elucidated. However, much less is known about the natural variation of respiration. Here we conducted a survey on the natural variation of leaf dark respiration (Rd) in a global rice minicore diversity panel and applied a genome-wide association study (GWAS) in rice (Oryza sativa L.) to determine candidate loci associated with Rd. This rice minicore diversity panel consists of 206 accessions, which were grown under both growth room (GR) and field conditions. We found that Rd shows high single-nucleotide polymorphism (SNP) heritability under GR and it is significantly affected by genotype-environment interactions. Rd also exhibits strong positive correlation to the leaf thickness and chlorophyll content. GWAS results of Rd collected under GR and field show an overlapped genomic region in the chromosome 3 (Chr.3), which contains a lead SNP (3m29440628). There are 12 candidate genes within this region; among them, three genes show significantly higher expression levels in accessions with high Rd. Particularly, we observed that the LRK1 gene, annotated as leucine rich repeat receptor kinase, was up-regulated four times. We further found that a single significantly associated SNPs at the promoter region of LRK1, was strongly correlated with the mean annual temperature of the regions from where minicore accessions were collected. A rice lrk1 mutant shows only ~37% Rd of that of WT and retarded growth following exposure to 35 °C for 30 days, but only 24% reduction in growth was recorded under normal temperature (25 °C). This study demonstrates a substantial natural variation of Rd in rice and that the LRK1 gene can regulate leaf dark respiratory fluxes, especially under high temperature.

Effects of biochar on uptake, acquisition and translocation of silver nanoparticles in rice (Oryza sativa L.) in relation to growth, photosynthetic traits and nutrients displacement

2019 ◽  
Vol 250 ◽  
pp. 728-736 ◽  
Author(s):  
Qumber Abbas ◽  
Guijian Liu ◽  
Balal Yousaf ◽  
Muhammad Ubaid Ali ◽  
Habib Ullah ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Photosynthetic Traits

scholarly journals Assessment of Genetic Variability for Agro-Morphological Important Traits in Aman Rice (Oryza Sativa L.)

2015 ◽  
Vol 3 (1) ◽  
pp. 73-79
Author(s):  
Golam Sarwar ◽  
Md. Sarowar Hossain ◽  
Md.Harun -Ur- Rashid ◽  
Shahanaz Parveen
Keyword(s):  
Oryza Sativa ◽  
Genetic Parameters ◽  
Gene Action ◽  
Oryza Sativa L ◽  
Genetic Advance ◽  
Panicle Length ◽  
Additive Gene Action ◽  
Days To Maturity ◽  
Additive Gene ◽  
High Heritability

The present study was conducted in the experimental farm, Sher-e-Bangla Agricultural University (SAU), Dhaka during July 2013-December2013. The analysis of variance revealed significant deviation for all the characters studied and indicated the existence of variation among thegenotypes. The PCV values were slightly higher than the respective GCV values for all the characters except unfilled grains per panicleindicating that the characters were less influenced by the environment. Total tillers per plant, effective tillers per plant, filled grains per panicle,unfilled grains per panicle and yield per plant showed high heritability coupled with high genetic advance percentage of mean which indicatedthe preponderance of additive gene action and such characters could be improved through selection. High heritability along with low geneticadvance as percentage of mean was found for plant height, days to 50% flowering, panicle length, days to maturity and thousand grains weightwhich indicated the non additive gene action for expression of these characters. Considering the genetic parameters and other agronomicperformances, the genotypes Special from AL-29, AL-36, PP-4B(i), AL-17(iii)B, AL-17(iii), AL-17(ii)A, Special from-129, Special from17(iv), AL-44(i), AL-17, Special from AL-36(D), PP-48, IR-25B, Special from AL-33, IR-25B (Tall), P-5B (ii) might be considered betterparents for future hybridization programme.DOI: http://dx.doi.org/10.3126/ijasbt.v3i1.11896    Int J Appl Sci Biotechnol, Vol. 3(1): 73-79 

scholarly journals Variability, heritability and genetic advance in rice (Oryza sativa L.)

2017 ◽  
Vol 12 (2) ◽  
pp. 244-247
Author(s):  
SUJEET KUMAR ◽  
ALOK KUMAR SINGH
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Genetic Advance

scholarly journals Variability, Heritability and Genetic Advance Studies in Advanced Genotypes of Rice (Oryza sativa L.)

2020 ◽  
Vol 9 (8) ◽  
pp. 1668-1670
Author(s):  
B. Manjunatha ◽  
Nagaraja Kusagur ◽  
B. Niranjanja Kumara
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Genetic Advance

scholarly journals Studies on Genetic Variability, Heritability and Genetic Advance for Yield and Yield Components in Drought Tolerant Rice (Oryza sativa L.) Landraces

2018 ◽  
Vol 7 (03) ◽  
pp. 299-305
Author(s):  
S.K. Singh ◽  
Monika Singh ◽  
Prudhvi Raj Vennela ◽  
D.K. Singh ◽  
Shubhra N. Kujur ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Genetic Variability ◽  
Yield Components ◽  
Oryza Sativa L ◽  
Genetic Advance ◽  
Drought Tolerant ◽  
Yield And Yield Components
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