drought related traits present in the germplasm and efficient utilization of available
genomic resources. Identification of genetic diversities for traits related to drought
tolerance, viz. root system architecture (RSA), water use efficiency, canopy wilting,
and sustained N-fixation under drought have helped in discovery of genetic
resources (Table 4.1) in soybean which are routinely being used as donor/check
genotypes for deciphering soybean genetic response for drought stress through
marker and genomics assisted strategies.
In the past decades, accelerated development in genetics, genomics, and soybean
genome sequence information has resulted in the identification of SNPs, copy
number variation, and structural variation in soybean germplasm (Kim et al. 2010;
Schmutz et al. 2010; Ratnaparkhe et al. 2014) (Table 4.2). The advancement in nextgeneration sequencing approaches (NGS) and cheap sequencing cost have
Table 4.1 Genetic resource for drought tolerance
Tolerant genetic
resource/genotype Basis of drought tolerance
Source
References
PI 416937
High Relative Water Content
(RWC), higher lateral root
spreading, increased Water
Use Efficiency (WUE), low
leaf hydraulic conductance,
slow wilting
USDA,
ARS
Sloane et al. (1990),
Patterson and Hudak (1996),
Sinclair et al. (2007), King
et al. (2009)
Young
High WUE
USDA,
ARS
Mian et al. (1996)
Jackson
High biomass and total N 2
–
Purcell et al. (1997)
PI 407155
Low electrolyte leakage, high
biomass accumulation, high
root moisture content
–
Chen et al. (2006)
R01-416F and
R01-581F
Higher N 2 fixation
USA
Chen et al. (2007a, b)
93705-36 and PI
471938
Slow wilting
USDA
King et al. (2009)
PI 468917
Lower transpiration
efficiency, greater root length
–
Seversike et al. (2014)
C12 and W05
Long root and high biomass,
high leaf expansion
CUHK,
China
Hossain et al. (2014)
PI 567690 and PI
567731
Leaf wilting
China
Pathan et al. (2014)
EC 538828, JS
9752 and EC
602288
Remobilization of stem
reserve at terminal drought,
drought resistance index
based on yield
India
Bhatia et al. (2014), Bhatia
and Jumrani (2016)
NTCPR94-5157,
N09-13890,
NC-Raleigh,
SC07-1518RR
High WUE and greater root
penetration
USA
Fried et al. (2019)
PK 1180 and SL
46
Seedling survivability
India
Sreenivasa et al. (2020)
4 Breeding and Molecular Approaches for Evolving Drought-Tolerant Soybeans
93
genomic resources. Identification of genetic diversities for traits related to drought
tolerance, viz. root system architecture (RSA), water use efficiency, canopy wilting,
and sustained N-fixation under drought have helped in discovery of genetic
resources (Table 4.1) in soybean which are routinely being used as donor/check
genotypes for deciphering soybean genetic response for drought stress through
marker and genomics assisted strategies.
In the past decades, accelerated development in genetics, genomics, and soybean
genome sequence information has resulted in the identification of SNPs, copy
number variation, and structural variation in soybean germplasm (Kim et al. 2010;
Schmutz et al. 2010; Ratnaparkhe et al. 2014) (Table 4.2). The advancement in nextgeneration sequencing approaches (NGS) and cheap sequencing cost have
Table 4.1 Genetic resource for drought tolerance
Tolerant genetic
resource/genotype Basis of drought tolerance
Source
References
PI 416937
High Relative Water Content
(RWC), higher lateral root
spreading, increased Water
Use Efficiency (WUE), low
leaf hydraulic conductance,
slow wilting
USDA,
ARS
Sloane et al. (1990),
Patterson and Hudak (1996),
Sinclair et al. (2007), King
et al. (2009)
Young
High WUE
USDA,
ARS
Mian et al. (1996)
Jackson
High biomass and total N 2
–
Purcell et al. (1997)
PI 407155
Low electrolyte leakage, high
biomass accumulation, high
root moisture content
–
Chen et al. (2006)
R01-416F and
R01-581F
Higher N 2 fixation
USA
Chen et al. (2007a, b)
93705-36 and PI
471938
Slow wilting
USDA
King et al. (2009)
PI 468917
Lower transpiration
efficiency, greater root length
–
Seversike et al. (2014)
C12 and W05
Long root and high biomass,
high leaf expansion
CUHK,
China
Hossain et al. (2014)
PI 567690 and PI
567731
Leaf wilting
China
Pathan et al. (2014)
EC 538828, JS
9752 and EC
602288
Remobilization of stem
reserve at terminal drought,
drought resistance index
based on yield
India
Bhatia et al. (2014), Bhatia
and Jumrani (2016)
NTCPR94-5157,
N09-13890,
NC-Raleigh,
SC07-1518RR
High WUE and greater root
penetration
USA
Fried et al. (2019)
PK 1180 and SL
46
Seedling survivability
India
Sreenivasa et al. (2020)
4 Breeding and Molecular Approaches for Evolving Drought-Tolerant Soybeans
93