Agro-morphological and physiological traits affecting grain yield of durum wheat advanced generations under rainfed conditions
سال انتشار: 1402
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 62
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شناسه ملی سند علمی:
JR_BREDNG-13-1_006
تاریخ نمایه سازی: 11 آذر 1402
چکیده مقاله:
Durum wheat production in the Mediterranean climate is limited when water shortages occur during anthesis. Breeding programs try to increase crop yield under challenging weather conditions such as water shortage. The improvement in phenotyping with the purpose of selecting key plant traits is important for increasing the efficiency of the breeding program. In this study, ۱۲۵ and ۱۱۹ durum recombinant inbred lines (RILs) from F۷ and F۸ generations, respectively, derived from the cross between the Iranian landrace “Iran_۲۴۹” and the Iranian variety “Zardak” were compared in the field over two successive years (۲۰۱۵ and ۲۰۱۶) in the temperate rainfed conditions with the Mediterranean climate. The results showed that the performance of RILs was influenced by the year. Harvest index, biomass, number of spikes per plant, number of tillers per plant, straw yield, spike weight, spike density, and weight of grains per spike were positively associated with the grain yield in two years. According to path analysis in the first year, the number of spikes per plant and awn length had a positive and significant direct effect on the grain yield whilst, in the second year, the positive and significant direct effects on the grain yield belonged to the number of tillers per plant, grain filling rate, and plant height. In conclusion, based on the two-year data, the RILs with higher spike weight, the weight of grains per spike, number of tillers per plant, biomass, grain filling rate, higher plant height with longer peduncle length, and longer spikes with longer awn length may have higher yield under rainfed conditions. These traits are promising traits for the indirect selection of grain yield. RILs No. ۲, ۱۶, ۲۹, ۴۳, ۶۶, ۸۰, ۱۰۰, and ۱۱۸ had the highest rank in both years and were superior to their parents.
کلیدواژه ها:
نویسندگان
Negar Aghaie
Department of Plant Production and Genetics, Faculty of Science and Agricultural Engineering, Razi University, Kermanshah, Iran
Leila Zarei
Department of Plant Production and Genetics, Faculty of Science and Agricultural Engineering, Razi University, Kermanshah, Iran
Kianoosh Cheghamirza
Department of Plant Production and Genetics, Faculty of Science and Agricultural Engineering, Razi University, Kermanshah, Iran
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