Table 2.

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

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***

Values (Mean ± SE) with dissimilar letters in a column are significantly different at p ≤ 0.001 (***); p ≤ 0.01 (**)