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Comparing the efficiency of the three heterotic-group and traditional two heterotic-group classifications for the hybrid maize breeding | ||
Journal of Plant Physiology and Breeding | ||
دوره 10، شماره 2، اسفند 2020، صفحه 99-107 اصل مقاله (384.83 K) | ||
نوع مقاله: Research Paper | ||
شناسه دیجیتال (DOI): 10.22034/jppb.2020.13521 | ||
نویسنده | ||
Mohammadreza Shiri* | ||
Seed and Plant Improvement Institute, Karaj, Iran. | ||
چکیده | ||
Increasing the efficiency of the hybrid-based maize breeding program has highly contributed to the heterotic group classification. The present study was aimed to compare the breeding efficiency of the three heterotic-group (TriHG) classification [Lancaster Sure Crop (LSC), Reid Yellow Dent (RYD), CIMMYT] system and usual two heterotic-group (DiHG) classification (RYD, LSC) system. To accomplish this, specific breeding efficiency (SBE) and general breeding efficiency (GBE) were estimated for the grain yield. The mating design was a line × tester scheme in which seven adapted tropical and subtropical lines were crossed to four testers. GBE increased by 128% in the TriHG classification system as compared to the DiHG system while no significant loss was observed in SBE. It seems that the TriHG system was advantageous over the DiHG system by improving the maize breeding efficiency. Therefore, using one tester from each of the three heterotic groups (RYD, LSC, CIMMYT) could be more efficient in hybrid-based maize breeding programs in temperate regions, including Iran. | ||
کلیدواژهها | ||
DiHG؛ Heterotic group؛ Heterotic pattern؛ Line × tester؛ TriHG | ||
مراجع | ||
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