Evaluation of Some Sweet Sorghum Genotypes to Stem Corn Borers Resistance With Presence of Morphological and Chemical Characters

Abstract

This work was conducted in the Agricultural Experimentation Center, Faculty of Agricultural, Al-Azhar University, Assiut Branch, during two successive seasons 2007 and 2008. Fifty three genotypes of sweet sorghum (Sorghum bicolor.L) were screened to find out how much each of the resistance variables affects the genotypes resistance against corn and sugar cane borers namely, (Sesamia cretica. Ledder and Chilo agamemnon.Bleszyncki.). The tested trits were plant height, leaves number and number of days to 50 % flowering, T.S.S. %, sucrose % and purity %. Data obtained indicated that the tested genotypes could be divided into four groups according to their susceptibility to borer infestation. The grouping pattern was as follows: (1) highly resistant group (HR) which contained twelve genotypes; (2) moderately resistant group (MR) which contained thirteen genotypes; (3) low resistant (LR) group which contained twenty genotypes and (4) highly susceptible group (HS) which contained eight genotypes. Highest plant were the genotypes 14R3A, Brandes, 14R1, Wily, 187 and 191 these genotypes significantly surpassed the other genotypes. The earliest flowering was recorded in the follows: genotypes 202, 43, 185, 202R3, 204, 25, Wiley and 80, where the earliest of them was 202. The highest numbers of leaves per plant were recorded to the genotypes 174 and 7R3 followed by 197, 185, 186, 220, 14R3A, 142R3, 43, 134, 222, 203R3, 209 and 39R1. While, the lowest numbers of leaves per plant were obtained from the genotypes 25, 202R3 and 202. The genotype 39R1 recorded the highest percentage of T.S.S. %, while the genotype 44 recorded the lowest percent. The highest percentage of recorded sucrose was 18.2 % in genotype 199 followed by 17.9 %, 17.8 %, 17.6 %, 17.2 % and 17.1 % in genotypes 96, 109, 14R3A, 33 and 195R3, respectively, while the lowest percentage was obtained in the genotypes 44 and Wiley. The genotype 170R1 recorded the lowest percentage of purity and Wiley. On the other hand, the genotypes 33, 70, 199, 96, 187 and 39R3A recorded significantly higher percentage of purity in comparative to the other genotypes. Generally, it could be concluded that the best promising genotypes lines

Cluster analysis and genetic variability of sweet sorghum (Sorghum bicolor L. Moench) genotypes using agro-morphological and juice quality traits

“…The current results agreed with those obtained by AbdEl-Raheem et al (2010),Khidr et al (2021), andYücel et al (2022) who found obvious differences among tested genotypes in brix percentage. With respect to sucrose % content, three genotypes (Rona, SS405, and Roma) were found to be outperformed the remainder of tested sweet sorghum genotypes in this study recording more than 11 % where the lowest sucrose % values (less than 9 %) were obtained by Willy, Dall, GK Ahron and Sugar drip genotypes showing the possibility of participation of these genotypes in the breeding program of sorghum crop to improve the sugar content(Rao et al, 2013 andErdurmus et al, 2018).…”

“…Results in Table3revealed that genotypes; Willy, William, and Atlas out yielded high values of juice extraction % (34.28, 39.82, and 4.69 %) and juice yield (4.87, 5.24 and 4.69 ton/fed), respectively indicating their magnitude as promising genotypes that may be used in breeding programs of sweet sorghum. The current results are harmonized with many previous investigations reported byAbd El-Raheem et al (2010),Rao et al (2013),Erdurmus et al (2018),Mulima et al (2018),Khidr et al (2021) andYücel et al (2022) who confirmed that the considerable variability among the assessed sweet sorghum genotypes considering the juice quality readings provides a real chance to improve the juice productivity of sweet sorghum crop and its extracts and other products.…”