Inheritance of Resistance to Downy Mildew Disease in Maize
Elmoghazy, S., Badr, M., El- Kot, G., Tolba, S. (2018). Inheritance of Resistance to Downy Mildew Disease in Maize. EKB Journal Management System, 9(12), 897-900. doi: 10.21608/jppp.2018.44105
S. M. Elmoghazy; M. M. Badr; G. A. El- Kot; Samar Tolba. "Inheritance of Resistance to Downy Mildew Disease in Maize". EKB Journal Management System, 9, 12, 2018, 897-900. doi: 10.21608/jppp.2018.44105
Elmoghazy, S., Badr, M., El- Kot, G., Tolba, S. (2018). 'Inheritance of Resistance to Downy Mildew Disease in Maize', EKB Journal Management System, 9(12), pp. 897-900. doi: 10.21608/jppp.2018.44105
Elmoghazy, S., Badr, M., El- Kot, G., Tolba, S. Inheritance of Resistance to Downy Mildew Disease in Maize. EKB Journal Management System, 2018; 9(12): 897-900. doi: 10.21608/jppp.2018.44105

Inheritance of Resistance to Downy Mildew Disease in Maize

Journal of Plant Protection and Pathology
Article 22, Volume 9, Issue 12, December 2018, Page 897-900  XML PDF (321.59 K)
Document Type: Original Article
DOI: 10.21608/jppp.2018.44105
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Authors
S. M. Elmoghazy1; M. M. Badr2; G. A. El- Kot2; Samar Tolba1
1Plant Pathology Res .Inst., Agric. Res. Center, Giza, Egypt
2Agric. Botany.Dept., Plant Pathology branch, Fac. Agric.,Kafrelsheikh Univ., Egypt
Abstract
This study was carried out in the disease nursery at Agricultural Research Station of Sakha during 2014 and 2015 maize growing seasons. Theinheritance of resistance to sorghum downy mildew disease in maize was investigated. The obtained results indicated that, the additive gene effect, additive by additive and additive by dominance gene effects in two tested maize single crosses (SC) were significant and generally were in the resistance direction (have negative sign). While thedominance and dominance bydominance gene effects were notsignificant in two tested maize genotypes. Therefore, recurrent or mass selection scheme using the advanced generations of two tested crosses (SC 10 and SC120) would be appropriate to accumulate genes for resistance to this disease. As well as, the degree ofdominance (patience ratio) for disease in the twotested crosses were in partial dominance and in direction of resistant parent (less than one and has negative sign). Moreover, the estimates of heritability in broad sense were high, while it was low in narrow sense and in the genetic advance in the tested maize crosses. It seems likely that the environmental variation play a serious role in development of this disease. Moreover, the cytoplasmicconstitution of the female parent are interfere in conditioning theinheritance of resistance to sorghum downy mildew disease in maizeespecially in case of the single cross 120.
Keywords
Maize; Sorghum; downy mildew; inheritance resistance
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