This study, conducted at the College of Agriculture, University of Kirkuk, in autumn during the growing season of 2023, aimed to examine the effect of heat accumulation on the growth and productivity of nine maize genotypes three different planting dates (July 5, July 15, and July 25). A split-plot design with a randomized complete block design with three replicate was used to analyze the impact of planting dates and genotypes on various heat accumulation stages, aiming to estimate genetic parameters variance, phenotypic variance, and expected genetic advance for each growth stage.
The findings indicated that the various planting dates had a substantial impact on heat. In early heat accumulation phases (VE, V2, and V4), The expected genetic advance values for these stages were notably high, with percentages of 29.175%, 19.077%, and 18.283%, respectively the initial date (July 5) showed strong heritability rates, suggesting the possibility of improving genetic characteristics by selection at these periods. Meanwhile, these values were lower in stages such as V6 and V8, with heritability values of 0.571 and 0.572, respectively.. For the second date (July 15), heritability values were high in most stages, suggesting a significant influence of genetic factors, with moderate to high genetic advance in early stages but low in later stages like V12 (9.900%) and V14 (4.256%). For the third date (July 25), genetic and phenotypic variance values were moderate across most stages, reflecting notable genetic and phenotypic variation. Heritability values were high in almost all stages, except for the final stage(V14), which had a moderate value of 0.457627. The expected genetic advance values were moderate across most stages, suggesting the potential to improve genetic traits at certain stages. |
- Abe, Ayodeji, and C.A. Adelegan. 2019. Genetic variability, heritability, and genetic advance in shrunken-2 super sweet corn (Zea mays) saccharata populations. Journal of Plant Breeding and Crop Science, 11(4): 100-105.
- Ahmed, S. I. H. K. K. (2023). Effect of nano-NPK fertilizer on some growth characteristics and yield of Maize (Zea mays L.). Journal of Medical and Industrial Plant Sciences.
- Alam, Mohammad Ashraful, Marufur Rahman, Salahuddin Ahmed, Nasrin Jahan, Mohammad Al-Amin Khan, Mohammad Rafiqul Islam, Amnah Mohammed Alsuhaibani, Ahmed Gaber, and Akbar Hossain. 2022. “Genetic Variation and Genotype by Environment Interaction for Agronomic Traits in Maize (Zea Mays L.) Hybrids.” Plants (Basel, Switzerland) 11 (11).
- Al-Ghi, Mohammed Abdullah Aidan. 2021. Evaluation of the performance of several synthetic varieties of yellow corn and estimation of some of their genetic parameters under varying levels of humic acid. Master's Thesis, College of Agriculture – University of Tikrit.
- Ali, Abda Kamel Abdullah. 1999. Hybrid vigor and gene action in yellow corn (Zea mays). PhD Thesis, College of Agriculture and Forestry, University of Mosul.
- Al-Jubouri, Khaled Khalil, Mohammed Ibrahim Mohammed, and Khitab Abdullah Mohammed. 2009. Study of correlation, variance, and estimation of some genetic parameters for yield traits and components in bread wheat. Diyala Journal of Agricultural Sciences, 1 (1): 308-319.
- Alnagar, Amer & Kadhim, Zuhal. (2021). The Economic Influences of Loss of Production and Marketing of Yellow Corn Crop in Iraq (Babil Province; a Case Study). Muthanna Journal for Agricultural Sciences. 8. 10.52113/mjas04/8.3/35p.
- Al-Rawi, Ahmed Rajab Mohammed, Omar Ismail Mohsen Al-Dulaimi, Imad Khalaf Khader Al-Qaisi, and Ahmed Hawas Abdullah Anis. 2016. Estimation of some genetic parameters and stability in half-diallel crosses in yellow corn (Zea mays). Tikrit University Journal of Agricultural Research, 16 (1): 1-20.
- Anderson, W.K., & Garlinge, J.R. (2000). The Wheat Book: Principles and Practice.
- Bakhtash, Fadel Younis, Ali Salim Mahdi, and Abdul Hamid Ahmed Younis. 2000. Genetic analysis of some traits in bread wheat. Journal of Agricultural Sciences, 31 (4): 393–416.
- Brown, D.M. and A. Bootsma. 1993. Crop Heat Units for Corn and Other Warm Season Crops in Ontario. Ontario Ministry of Ag., Food, and Rural Affairs Factsheet #93-119.
- Dawod KM, and Z, Abdulyas 1990. Statistical procedures of Agricultural Research. Ministry of Higher Education and Scientific Research the University of Al Mosul Iraq.
- Emergence, Germination. 2023. “MAIZE HEAT UNITS – DECEMBER 2023 BY JON MYHILL – MGA AGRONOMIST,” no. December.
- Fisseha, Kibrom, Firew Mekbib, and Gezahegn Bogale. 2020. Genetic variability and divergence of drought-tolerant open-pollinated maize (Zea mays) genotypes grown under random stress in Jigjiga, Ethiopia. African Journal of Plant Science, 8 (1): 40-50.
- Hayder Abbas Drebee et al 2023 IOP Conf. Ser.: Earth Environ. Sci. 1259 012128
- K A H Al Bayati et al2023 IOP Conf. Ser.: Earth Environ. Sci. 1252 012014
- Kebede, M.B. 2020. Genetic variability of maize (Zea mays) genotypes for some yield and yield components at Tlarmaya – Eastern Ethiopia. Turkish Journal of Agriculture – Food Science and Technology, 8(9): 1840-1845.
- Kempthorne, B. 1969. An Introduction to Genetic Statistics. Ames: Iowa State University Press. Cited by Rasheed (1989).
- Marina F. e Silva, Gabriel M. Macie, Rafael R. Finzi, Joicy Vitoria M. Peixoto, Wender S. Rezende, Renata Castoldi. Selection indexes for agronomic and chemical traits in segregating sweet corn populations. Horticultura Brasileira, 38: 71-77.
- Nasser, N.M.H.R., Latheeth, and A.M. Ahmed. 2016. Genetic analysis for combining ability and estimation of some genetic parameters for inbred lines and single cross hybrids of maize. Al-Anbar Journal of Agricultural Sciences, 14(1): 155-162.
- Rasheed, Adnan, Muhammad Ilyas, Taj Naseeb Khan, Athar Mahmood, Usama Riaz, Muhammad Bilal Chattha, Najla Amin T Al Kashgry, et al. 2022. “Study of Genetic Variability, Heritability, and Genetic Advance for Yield-Related Traits in Tomato (Solanum Lycopersicon MILL.).” Frontiers in Genetics 13:1030309. https://doi.org/10.3389/fgene.2022.1030309.
- Sabah Jalil, Hassoun Shalash, and Mowafaq Fawzi. 1991. Guide to the Use of Chemical Fertilizers, Bulletin of the Iraqi Ministry of Agriculture.
- Taha, Abbas Abdullah and Muwaffaq Jabr Al-Laylah and Khaled Saeed Abdullah. 2019. Effect of humic acid and plant density on the growth and yield of two characteristic of yellow corn (Zea mays L). Journal of Kirkuk University for Agricultural Sciences, Third International Agricultural Conference (Special Issue): 871-904.
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