نوع مقاله : مقاله پژوهشی
نویسندگان
بخش تحقیقات ذرت و گیاهان علوفه ای، موسسه تحقیقات اصلاح و تهیه نهال و بذر، سازمان تحقیقات ،آموزش و ترویج کشاورزی، کرج، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
One of the key stages in producing synthetic varieties in alfalfa (Medicago sativa L.) is estimating the combining ability of parents by evaluating the forage yield of polycross progenies. In this regard, this experiment was conducted with 20 genotypes, including 10 polycross progenies and 10 parent alfalfa ecotypes/varieties, including two varieties, Ahang and Mandegar, two ecotypes from Bami and Yazdi alfalfa, and six cold and temperate region alfalfa ecotypes with codes KFA16, KFA4, KFA3, KFA13, KFA11, KFA15. The experiment was carried out in a randomized complete block design with three replications in the 400-hectare farm of the Seed and Plant Improvement Institute in Karaj during the years 2020-2022. The traits studied included plant height, stem number per square meter, regrowth rate, fall dormancy score, and dry and fresh forage yield. Statistical analysis results showed a significant difference between the means of polycross progenies (half-sib families) and their parents for all traits except fresh forage yield. The half-sib family Poly-KFA3 had the highest dry forage yield with 22.91 tons per hectare, and Poly-KFA15 had the lowest with 19.48 tons per hectare. The highest percentage of heterosis in plant height, stem number per square meter, regrowth rate, fall dormancy score, fresh and dry forage yield were 13.25%, 7.94%, 57.03%, 150.49%, 10.92%, and 14.25%, respectively. Based on the general combining ability estimates for the traits studied, five parents (Bami, Yazdi, KFA3, KFA13, and KFA16) were selected for crossing and creating a new synthetic population.
کلیدواژهها [English]
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