University of Tabriz Journal of Plant Physiology and Breeding 2008-5168 11 2 2021 12 01 Path analysis of yield and yield components in super-sweet maize (Zea mays L. var. Saccarata) inbred lines at drought-stress and normal conditions تجزیه علیت عملکرد و اجزای عملکرد در لاین های اینبرد ذرت فوق شیرین (Zea mays L. var. Saccarata) تحت شرایط نرمال و تنش خشکی 87 96 14560 10.22034/jppb.2021.14560 EN Mohsen Shahrokhi Department of Biotechnology and Plant Breeding, Science and Research Branch, Islamic Azad University, Tehran, Iran Saeed Khavari Khorasani Department of Crop and Horticulture Research, Khorasan Razavi Agriculture and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization, Mashhad, Iran Asa Ebrahimi Department of Biotechnology and Plant Breeding, Science and Research Branch, Islamic Azad University, Tehran, Iran Eslam Majidi Heravan Department of Biotechnology and Plant Breeding, Science and Research Branch, Islamic Azad University, Tehran, Iran Mansoure Kermani Department of Agricultural Science, Payam Noor University, Tehran, Iran Journal Article 2021 04 21 To identify the most effective characteristics on grain yield, 24 super-sweet maize inbred lines were investigated under two moisture conditions (normal and drought stress) during the 2017 growing season. The experiment was carried out as a randomized complete block design with four replications. Analysis of variance for grain yield and eight agronomic characteristics showed significant differences among investigated inbred lines. Phenotypic correlations indicated that grain yield had a significant relationship with kernel number per row, ear diameter, row number per ear, and stem diameter under normal conditions, and with kernel number per row and plant height under drought-stress conditions. Stepwise multiple linear regression showed that kernel number per row, ear diameter, and stem diameter explained 72% of the variation for grain yield at normal conditions. On the other hand, cob present, plant height, ear diameter, and ear length governed 60% of the grain yield variation under drought-stress conditions. Path analysis under normal conditions revealed that kernel number per row had the highest positive direct effect (0.717) on the grain yield followed by the stem diameter (0.292) and ear diameter (0.273). In the drought stress conditions, ear diameter (0.455) and plant height (0.436) showed the highest positive direct effects on grain yield. https://breeding.tabrizu.ac.ir/article_14560_cb33178b9284c2445bc85973326a022f.pdf