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Table 2 Symbiotic performance, dry matter and grain yield of 9 cowpea varieties grown in Wa, Ghana.

From: Symbiotic functioning and bradyrhizobial biodiversity of cowpea (Vigna unguiculataL. Walp.) in Africa

Genotype Nodule number Nodule DM Shoot DM δ15N Ndfa
  per plant mg.plant -1 g.plant -1 %
Omondaw 35.0 ± 0.3b 1200.0 ± 57.7c 25.9 ± 3.7ab -0.57 ± 0.2e 86.6 ± 0.1a
Brown eye 15.4 ± 0.3d 366.7 ± 33.3d 13.5 ± 1.6cd 0.30 ± 0.1d 76.8 ± 1.6c
Apagbaala 16.5 ± 1.4d 466.7 ± 33.3d 25.7 ± 2.8ab 0.76 ± 0.1bc 71.6 ± 1.3de
IT82D-889 41.3 ± 0.3a 2666.7 ± 66.7a 18.9 ± 1.4bc -0.21 ± 0.1de 82.6 ± 1.6b
ITH98-46 26.6 ± 1.2c 500.0 ± 0.0d 8.8 ± 0.3d 0.50 ± 0.0cd 74.6 ± 0.2cd
Bechuana white 43.0 ± 0.8a 1733.3 ± 33.3b 18.7 ± 4.0bc 0.76 ± 0.1bc 71.6 ± 0.6de
Glenda 34.0 ± 1.4b 1733.3 ± 88.2b 27.7 ± 2.3a 0.81 ± 0.1a 70.7 ± 0.3e
Mamlaka 34.3 ± 1.5b 100.0 ± 11.0e 12.6 ± 2.0cd 1.00 ± 0.1a 69.3 ± 0.8e
Fahari 36.0 ± 0.8b 100.0 ± 10.0e 16.9 ± 1.2c 0.96 ± 0.2a 69.9 ± 1.8e
F-statistics 97.5*** 384*** 7.4*** 29.4*** 29.4***
  N content Grain yield N-fixed   
  mg.plant -1 kg.ha -1 mg.plant -1 kg.ha -1  
Omondaw 1077.5 ± 130.2ab 791.2 ± 144.8a 933.8 ± 111.8a 155.6 ± 18.6a  
Brown eye 705.5 ± 97.0cd 865.6 ± 93.8a 540.0 ± 68.2bcd 90.0 ± 11.4bcd  
Apagbaala 1233.4 ± 164.8a 723.1 ± 228.1a 887.6 ± 134.4a 147.9 ± 22.4a  
IT82D-889 896.1 ± 50.1abc 687.6 ± 104.3a 738.7 ± 29.5ab 123.1 ± 4.9ab  
ITH98-46 392.8 ± 9.1d 862.3 ± 59.5a 292.9 ± 6.7d 48.8 ± 1.1d  
Bechuana white 837.3 ± 171.1bc 652.7 ± 76.7a 599.9 ± 124.2bc 100.0 ± 20.7bc  
Glenda 1244.3 ± 111.9a 888.1 ± 102.6a 879.3 ± 79.3a 146.5 ± 13.2a  
Mamlaka 579.5 ± 94.9cd 686.7 ± 47.6a 401.0 ± 63.0cd 66.8 ± 10.5cd  
Fahari 727.5 ± 54.1bcd 252.5 ± 62.4b 507.3 ± 28.7bcd 84.5 ± 4.8bcd  
F-statistics 7*** 3** 7.6*** 8***  
  1. Values (Mean ± SE) with dissimilar letters in a column are significantly different at p ≤ 0.001 (***); p ≤ 0.01 (**)