A Search for Candidate Gene for Cowpea Powdery Mildew Resistance in the Southern Guinea Ecology of Nigeria

Ugochi AMAZUE

Makale detayları

A Search for Candidate Gene for Cowpea Powdery Mildew Resistance in the Southern Guinea Ecology of Nigeria

Yazarlar:

Ugochi AMAZUE

Yayıncı:

Bitki Islahçıları Alt Birliği

Dergi:

Ekin Journal of Crop Breeding and Genetics 2016 Vol.2 Issue 2, pp.87-94

Belge Tipi:

Makale

Yayın Tarihi:

7/2016

Belge Dili:

Türkçe

Document ID (Org No.):

2000405189

eISSN:

2459-069X

pISSN:

2149-1275

Özet:

 


The need to identify candidate gene for resistance to powdery mildew (PM), a major fungal foliar disease of cowpea in
Southern guinea savannah of Nigeria has necessitated this research. An experiment involving 13 cowpea genotypes was
laid out in a randomized complete block design (RCBD) of two replications at the Botanical Garden, University of Nigeria,
Nsukka, Nigeria. Each genotype was scored for susceptibility to the disease. Four parents were afterward selected for
progeny generation through a 2 x 2 factorial mating design. The F1 hybrids were evaluated in RCBD of two replications on
the field for powdery mildew resistance. The scored data was transformed by arcsine method before subjection to analysis
in SAS (version, 9.3). Analysis of variance (ANOVA) revealed significant (P<0.01) differences among the 13 genotypes
in their susceptibility to PM. The male, female and the interaction of both significantly (P<0.001) differed. Additive
genetic variance (510.07) was higher than the dominance genetic variance (387.67). Additive gene action was prominent
in this study. The broad and narrow sense heritability estimates were: 99.9% and 56.8% respectively. The average degree
of dominance was 1.23 and the genetic advance was 62.09. Heterosis which signifies resistance to PM was observed in the
crosses between Nsukka-BA x IT89KD-374-57, IT90K-59 x IT89KD-374-57 and IT90K-59 x Nsukka-1B. The identified
resistant genotypes (IT90K-59, Nsukka-BA and IT89KD-374-57) would be resources for further breeding programme.
Powdery mildew cowpea resistant cultivar development could be achieved through hybridization programme since the
major contribution to the inheritance of the trait was additive.

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Makale detayları

A Search for Candidate Gene for Cowpea Powdery Mildew Resistance in the Southern Guinea Ecology of Nigeria

Yazarlar: Ugochi AMAZUE

Yayıncı: Bitki Islahçıları Alt Birliği

Dergi: Ekin Journal of Crop Breeding and Genetics 2016 Vol.2 Issue 2, pp.87-94

Belge Tipi: Makale

Yayın Tarihi: 7/2016

Belge Dili: Türkçe

Document ID (Org No.): 2000405189

eISSN: 2459-069X

pISSN: 2149-1275

Sayı

Yazarlar:

Ugochi AMAZUE

Yayıncı:

Bitki Islahçıları Alt Birliği

Dergi:

Ekin Journal of Crop Breeding and Genetics 2016 Vol.2 Issue 2, pp.87-94

Belge Tipi:

Makale

Yayın Tarihi:

7/2016

Belge Dili:

Türkçe

Document ID (Org No.):

2000405189

eISSN:

2459-069X

pISSN:

2149-1275