Agro-morphological Performances of M3 Generation of Irradied Maize in Central African Republic

Productivity of Maize in Central African Republic (CAR) is further reduced by the invasion of Fall Armyworm. The use of developing genetic resistance in maize against the pest remains under-explored. This present study was conducted to determine the effects of radiation on maize growth and development. The test with diffrents doses of irradiation (Controls, 100 Gy, 200 Gy, 300 Gy, 400 Gy and 500 Gy) was performed on three varieties (CMS85 01, CMS-20 19 and CMS87 04) of maize and on the local ecotype of CAR.

The effect of varieties and differences doses on the growth parameters (plant survival, number of leaves, length of leaves, larger of leaves, Plant height diameter of collet,) and yield parameters (number of cobs, number of rows per cob, numbers of grain par cob) was performed using ANOVA 2 with R software version 3.1.3. The Shapiro-Wilk test to normalize the data and and differences tests using a significance level of 0.05. The Principal Analysis of Component was used to analyse the relationships between the growth parameters and yield parameters of in different treatments.

Few number of leaves are observed from local ecotypes than the all varieties, fellowing by CMS 2019 with exception from dose 400 Gy. The two others varieties respectfully CMS 8501 et CMS 8704 have sensibly equal number of leaves. Statistically, the significant difference (P-value= 4.363e-05) was observed between differentes varieties according the differentes doses of iradiation (P-value= 6.665e-16).

The height from differentes varieties according the differentes doses are equal, exception the dose 400Gy of CMS 2019. Statistically, the difference observe dis not significative. But, the height of 400 Gy from the variety CMS 2019 is less important than the rest of doses from others varieties.

The most less quantity of grains (228) was obtained from the CMS 2019 variety at 400Gy and the most important quantity (2040) from the same variety at 300 Gy. produced the most less number of rows per cob. The CMS 8704 variety at 100 Gy produced the most important number of rows per cob.

Statistically, there is the significant difference according to the maize varieties (P-valu= 0.0014874) and the differentes doses of iradiation (P-value= 0.865586).