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Aus rice root architecture variation contributing to grain yield under drought suggests a key role of nodal root diameter class

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Title Aus rice root architecture variation contributing to grain yield under drought suggests a key role of nodal root diameter class
 
Creator Liao, Qiong
Chebotarov, Dmytro
Islam, Mohammad S.
Quintana, Marinell R.
Natividad, Mignon A.
Ocampo, Marjorie de
Beredo, Joseph C.
Torres, Rolando O.
Zhang, Zhenhua
Song, Haixing
Price, Adam H.
McNally, Kenneth L.
Henry, Amelia
 
Subject rice
grain
crop yield
roots
growth rate
drought
physiology
 
Description The aus rice variety group originated in stress-prone regions and is a promising source for the development of new stress-tolerant rice cultivars. In this study, an aus panel (~220 genotypes) was evaluated in field trials under well-watered and drought conditions and in the greenhouse (basket, herbicide and lysimeter studies) to investigate relationships between grain yield and root architecture, and to identify component root traits behind the composite trait of deep root growth. In the field trials, high and stable grain yield was positively related to high and stable deep root growth (r = 0.16), which may indicate response to within-season soil moisture fluctuations (i.e., plasticity). When dissecting component traits related to deep root growth (including angle, elongation and branching), the number of nodal roots classified as 'large-diameter' was positively related to deep root growth (r = 0.24), and showed the highest number of colocated genome-wide association study (GWAS) peaks with grain yield under drought. The role of large-diameter nodal roots in deep root growth may be related to their branching potential. Two candidate loci that colocated for yield and root traits were identified that showed distinct haplotype distributions between contrasting yield/stability groups and could be good candidates to contribute to rice improvement.
 
Date 2022-03
2023-01-18T17:14:30Z
2023-01-18T17:14:30Z
 
Type Journal Article
 
Identifier Liao, Qiong, Dmytro Chebotarov, Mohammad S. Islam, Marinell R. Quintana, Mignon A. Natividad, Marjorie De Ocampo, Joseph C. Beredo et al. 2022. Aus rice root architecture variation contributing to grain yield under drought suggests a key role of nodal root diameter class. Plant, Cell & Environment 45(3):854-870.
0140-7791
https://hdl.handle.net/10568/127431
https://doi.org/10.1111/pce.14272
 
Language en
 
Rights Copyrighted; Non-commercial educational use only
Limited Access
 
Format 854-870
 
Publisher Wiley
 
Source Plant, Cell and Environment