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African Crop Science Journal
African Crop Science Society
ISSN: 1021-9730
EISSN: 2072-6589
Vol. 4, No. 2, 1996, pp. 139-144
Bioline Code: cs96050
Full paper language: English
Document type: Research Article
Document available free of charge

African Crop Science Journal, Vol. 4, No. 2, 1996, pp. 139-144

 en Growth and development characteristics in reciprocal crosses between weedy and cultivated cowpea
Ilori, C.O.; Togun, A.O. & Fawole, I.


Variation in growth and development characteristics among three
cultivated and one weedy cowpea (Vigna unguiculata L. Walp)
lines and their reciprocal hybrids were studied.  Most of the
characters varied significantly among the parental lines. 
Reciprocal differences were observed in the length as well as the
width of cotyledonary leaves in most of the F1 hybrids,
particularly all those involving the weedy line as a parent.  The
greatest amount of variability among the parental lines and the
hybrids was in 100-seed weight.  The 100 seed-weight was 
positively correlated with length of cotyledonary leaves,  number
of days to first flower, width of cotyledonary leaves and pod
length.  The 100-seed weight was highly significantly negatively
correlated with number of pods/plant, number of peduncles/plant,
number of seeds/pod and number of ovules/pod.  It would seem that
selection for large cotyledonary leaves could be a means of
selecting for higher seed yield in cowpea.

Genetic variation, reciprocal hybrids, Vigna unguiculata

Ilori, C.O.; Togun, A.O. & Fawole, I.


Les caracteristiques de croissances et de developpement
de trois cultivars et une lignee herbacee de niebe (Vigna
unguiculata L. Walp) et de leurs hybrides reciproques etaient
etudiees. Pour la plupart des caracteristiques, il y a une
variabilite significative chez les lignees parentales. Des
differences reciproques sont observees pour la longeur et la
largeur des feuilles cotyledonaires dans la plupart des hybrides
F1, surtout pour les hybrides avec la lignee herbacee comme
parent. La plus grande variabilite chez les lignees parentales
et les hybrides etait notee dans le poids de 100 grains. Une
correlation positive etait observee entre le poids de 100 grains
et la longueur de feuilles cotyledonaires, le nombre de jours
jusqula premire floraison, la largueur de feuilles cotyledonaires
et la longeur de gousses. La correlation entre le poids de 100
grains et le nombre de gousses par plante, le nombre de
pedoncules par plante, le nombre de grains par gousse et le
nombre des par gousse etait negative. Il semble que selection
pour des feuilles cotyledonaires larges est un moyen de selection
pour un rendement eleve chez le niebe.

Mots Clés
Variabilite genetique, hybrides reciproques, Vigna unquiculata

© Copyright 1996 - African Crop Science Society

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