TY - JOUR
T1 - Biochemical and molecular characterization of cowpea landraces using seed storage proteins and SRAP marker patterns
AU - Alghamdi, Salem S.
AU - Khan, Muhammad A.
AU - Migdadi, Hussein M.
AU - El-Harty, Ehab H.
AU - Afzal, Muhammad
AU - Farooq, Muhammad
N1 - Funding Information:
Authors are highly grateful to King Abdulaziz City for Science and Technology (KACST) for their support, encouragement and funding this project # AT-35-60. Simultaneously, the research team would also express their appreciation to researchers support services unit at King Saud University (KSU), Riyadh, Saudi Arabia for language editing.
Publisher Copyright:
© 2018 The Authors
PY - 2019/1
Y1 - 2019/1
N2 - Seven landraces of cowpea [Vigna unguiculata (L.) Walp.] were assessed for genetic variability in total proteins, protein fractions viz. albumins, globulins, prolamins, and glutelins by SDS-polyacrylamide gel electrophoresis and DNA polymorphism using sequence-related amplified polymorphisms (SRAP) markers. The solubility-based protein fractionation data indicated that the salt soluble fraction (globulin) and water-soluble fraction (albumin) proteins were the predominant fractions in cowpea seeds comprising 45–50.3% and 31.2–35.5% of total soluble proteins, respectively. The electrophoretic pattern revealed the molecular heterogeneity among total proteins as well as different protein fractions. The molecular weights of protein bands obtained by SDS-PAGE varied between 10 to 250, 15 to 110, 15 to 150, and 15 to 130 kDa for total proteins, albumins, globulins, and glutelins, respectively. A large number of bands were found common to the various landraces, indicative of their close relationship with one another. However, a few bands distinctive to some specific landraces were also detected, indicating varietal differences. A 34 SRAP primer pair combination generated a total of 1003 amplicons (loci) showed 100% polymorphism with an average of 0.93 polymorphism information content (PIC) value. Landraces displayed an average 0.50 similarity coefficient which clustered the landraces corresponding to their growth habit in main clusters and to their geographical origin in subcultures. Molecular and biochemical analysis were correlated with a medium level (Mantel test, r = 0.56, P < 0.02). These findings revealed that seed proteins and DNA polymorphism provide valuable information regarding the variability among landraces and this information could be utilized for breeding purposes in the enhancement of protein quality and quantity in grain legumes.
AB - Seven landraces of cowpea [Vigna unguiculata (L.) Walp.] were assessed for genetic variability in total proteins, protein fractions viz. albumins, globulins, prolamins, and glutelins by SDS-polyacrylamide gel electrophoresis and DNA polymorphism using sequence-related amplified polymorphisms (SRAP) markers. The solubility-based protein fractionation data indicated that the salt soluble fraction (globulin) and water-soluble fraction (albumin) proteins were the predominant fractions in cowpea seeds comprising 45–50.3% and 31.2–35.5% of total soluble proteins, respectively. The electrophoretic pattern revealed the molecular heterogeneity among total proteins as well as different protein fractions. The molecular weights of protein bands obtained by SDS-PAGE varied between 10 to 250, 15 to 110, 15 to 150, and 15 to 130 kDa for total proteins, albumins, globulins, and glutelins, respectively. A large number of bands were found common to the various landraces, indicative of their close relationship with one another. However, a few bands distinctive to some specific landraces were also detected, indicating varietal differences. A 34 SRAP primer pair combination generated a total of 1003 amplicons (loci) showed 100% polymorphism with an average of 0.93 polymorphism information content (PIC) value. Landraces displayed an average 0.50 similarity coefficient which clustered the landraces corresponding to their growth habit in main clusters and to their geographical origin in subcultures. Molecular and biochemical analysis were correlated with a medium level (Mantel test, r = 0.56, P < 0.02). These findings revealed that seed proteins and DNA polymorphism provide valuable information regarding the variability among landraces and this information could be utilized for breeding purposes in the enhancement of protein quality and quantity in grain legumes.
KW - Protein fractions
KW - SDS-PAGE
KW - SRAP
KW - Vigna unguiculata
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U2 - 10.1016/j.sjbs.2018.09.004
DO - 10.1016/j.sjbs.2018.09.004
M3 - Article
AN - SCOPUS:85053864790
SN - 1319-562X
VL - 26
SP - 74
EP - 82
JO - Saudi Journal of Biological Sciences
JF - Saudi Journal of Biological Sciences
IS - 1
ER -