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Genetic analysis of head inclination and its component in selected sunflower hybrids | ||
| Crop Breeding Journal | ||
| مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 02 تیر 1399 | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22092/cbj.2020.128482.1043 | ||
| نویسندگان | ||
Mehdi Ghaffari   1؛ Assadollah Zakeri Haddadan2؛ Eslam Majidi Hervan2؛ Bahram Alizadeh 3
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| 1Seed and Plant Improvement Institute, Agricultural Research Education and Extension Organization (AREEO), Karaj, Iran | ||
| 2Department of Plant Breeding, Science and Research Branch, Islamic Azad University, Tehran, Iran. | ||
| 3Oilseed Crops Research Department , Seed and Plant Improvement Institute, Agricultural Research Education and Extension Organization (AREEO), Karaj, Iran. | ||
| چکیده | ||
| In order to provide information about genetic control of head inclination in sunflower 12 sunflower hybrids obtained by crossing four lines and three testers as line×tester mating scheme evaluated in a randomized complete block design with three replications in Karaj, Iran in 2018. The results showed that the lines contributed more than other sources in variability of the hybrids for head weight (62.4%) while contribution of the testers was more for head diameter (62.8%), plant height (48.6%), head height (70.5%), achene yield (41.7%) and head inclination (54.5%). We found that the two hybrids including RGK33×AGK370 and RGK33×AGK356 had the lowest value for head inclination (23.7 and 24.0% respectively),while among the parent lines only RGK33 and AGK356 were in suitable range (25-35%) indicated that crossing the lines with undesirable head inclination can lead to the production of hybrids with desirable heads. We also found that head weight and head inclination are controlled mainly by additive gene effects suggests the crucial role of parental lines in improvement of hybrids with desirable head inclination. Both additive and non-additive gene action were significant for head diameter, plant height, head height and achene yield. Over-dominant gene action observed for plant height, achene yield and inclined length and partial dominance for head diameter, weight, height and inclination. Higher broad sense heritability values for plant height (0.86), head weight (0.72), head height (0.73) and head diameter (0.71) and lower heritability effects for head inclination, indicated that heritability of head inclination is independent from these components. All the hybrids resulted by crossing of restorer lines RGK21 and RGK33 had suitable head inclination compared with the progenies of RGK15. | ||
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