Online ISSN: 2515-8260

Keywords : cultivars

Evaluating faba bean cultivars and fungicide spray intervalsfor managing the chocolate spot (Botrytis fabaeSard.) diseaseinChelia district, West Shewa, Ethiopia

Kumela Regasa Tiki; Alemu Lencho; Thangavel Selvaraj; Kiran Ramaswamy

European Journal of Molecular & Clinical Medicine, 2020, Volume 7, Issue 6, Pages 1403-1427

The experiment was conducted inFarmers Training Center (FTC)at Chelia district, West Shewa Zone, Ethiopiaespecially on cropping season of 2018,for evaluating four faba bean  cultivars (Walki,Hachalu, Asebeka and Local) and the efficacy of the fungicide, Trust –Cyomp 439.5 WP at the rate of 1.5 kg/ha at four various spray intervals (once in a week, after two weeks, after three weeks and unsprayed-control) based on conditions on the field for maintaining and managingfaba bean  chocolate spot disease and its impact on both yield and its relevant components. Entirely sixteen treatments are involved in factorial allignment in Randomized Complete Block Design (RCBD) with three replications. The chocolate spot disease incidence,criticality and region under disease progress curve were the highest in cultivar Local followed by Ashebeka, Hachalu and Walki in unsprayed plots. Among different spray intervals, weekly applied plots were found the most effective in disease reduction with maximum reduction in Walki and minimum in Local cultivar.The effectiveness of cultivars along with spray intervals of fungicide displayed significant variations in pods per plant, yield of the grain, and hundred seed weight; and had no significant effects on seeds per pod. The relative yield loss of 37.31,35.029.0 and 28.5% were recorded fromLocal,Ashebeka, Walki and Hachaluin unsprayed plots, respectively. Economic analysis showed that the highest net benefits were obtained from Hachalu and Walki(46400 and 44480 birr/ ha)when sprayed at every two weeks intervals and from Ashebeka and Local, the highest benefit (41760 and 36640 birr /ha) was obtained on every one week sprayed interval plots and the least was obtained from Local unsprayed plots (28160birr /ha). The Highest rate of margin based on return was achieved when it was sprayed at every two weeks intervals byAshebeka (374.3%) followed by Hachalu sprayed at every three weeks spray intervals (227%), but the lowest was obtained from local with spray of fungicide at every three weeks intervals (Birr 42%). The results of this study provide evidences that the reactive nature offaba bean cultivars to weekly and two weeks spray intervals of fungicide applications found to be effective in reducing chocolate spot severity and increased seed yield of faba bean cultivars under field conditions in Chelia district, Ethiopia.

Development And Utilization Of Chromosome Substitution Lines (Csls)

J. Pranay Reddy; Nidhi Dubey; Harshal Avinashe; Swapnil Kalubarme; T. Naga Srinivasa Reddy

European Journal of Molecular & Clinical Medicine, 2020, Volume 7, Issue 7, Pages 2411-2424

Deportation of one set of chromosomes from a strain into the other distinct strain is defined as chromosome substitution. In order to investigate the effects of individual chromosomes they are transferred from a variety to another variety sharing common genetic history. Alternatively, a chromosome carrying a desirable gene or a group of genes may be transferred into another variety lacking those genes. Chromosome substitution in most widely used in plant breeding to developing a resistant variety by advanced mapping populations, including CSSLs, ILs, BILs & NILs. Furthermore, for achieving the objective of enhancing the cultivated species through ingression of novel genes isolated from wild relatives, production of chromosome substitution lines with the help of marker assisted selection acts as the most promising tool. The wild and weedy cultivars of the major crops are sometimes used as germplasm sources in breeding programs. Unwanted effects are more exhibited by alien substitutions rather than alien additions due to which they are not directly used in agriculture.