Combining ability and yield performances of Indonesian waxy corn lines

• Main Authors: Santoso, Sigit Budi, Isnaini, Muzdalifah, Iriany, R. Neni, Makkulawu, A. Takdir
• Format: Conference Proceeding
• Language: English
• Subjects: Corn; Crop yield; Morphology
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0189230

Information on the ability of inbred lines to form cross combinations and its contribution to significantly increase yield is the main objective of performing diallel analysis. The heterotic effect caused by different genetic backgrounds and distant genetic relationships is what makes single cross-hybrid varieties possess higher grain outcomes relative to open-pollinated varieties. The research was conducted to study agro-morphological and yield performances of waxy corn lines derived from Indonesian cultivar, which was set in partial diallel Griffing’s method 2 consisting of 10 inbred parent lines. The total genotypes evaluated were 45 single crosses and 10 parent lines, arranged in complete block design with two replications of 1 row in 5 m per plot. Results of the study obtained significant diversity of grain yield and morphological traits, indicating a high genetic difference in parent lines used. Heterosis in grain yield of single cross due to Specific Combining Ability ((SCA) was highest in P2/P10 at 1.44 and heterosis percentage at 152.93%. In line with the highest grain yield obtained from single cross P2/P10 at 5.63 t/ha followed by P7/P8 at 5.34 t/ha. Specific Combining Ability significantly caused the heterosis percentage to rise up to 198.34% at its highest, compared to the parental yield average. Even though General Combining Ability (GCA) was not able to find significant values of 10 parental lines. Hybrid performances will be used to determine potential single cross for further grain yield evaluation, and a selection of parent lines for further breeding objectives.