Evaluation and selection in segregation populations to improve good quality lines in rice.
2009
Allah Qoli Pur, Mehrzad | Hosseini Chaleshtari, Maryam | Rahim Sorush, Hossein | Majidi, Farzad | E`badi, A`li Akbar | A`li Niya, Faramarz | Shafi`i, Hamid | Yekta, Mitra | Asad Ol-Lahi, Mas`ud | Tavazo`, Mohammad
Iran is one of the most consumers rice country in World. Varieties with good quality grains were chance for selecting with consumers. So one of the important gain in breeding rice is improving quality grains. Necessary conditions for realizing the new variety were initial known of controlling gene effects of quality traits in segregating generation and selecting by them. Diallel analysis benefit for those genetic evaluations. In two diallel sets selected the best parent by the evaluating genes effects of quality traits special amylase content, variation of dominant and recessive genes, cytoplasm effects, narrow sense heritability, general combination ability of varieties and specific combination ability of hybrids. Initial segregation of generates were F2 population .Three programs used for breeding in every populations: Pedigree, Bulk and Selective Bulk methods. Selected the best plants with measurement of morphologic traits in farm and quality traits in laboratory. Heritability of amylase content in multiple generate showed the results of Hyman and Griffing methods were true. Final were selected 328 pure lines with good characters. Some lines selected only for early maturity and semi dwarf, these lines used donor plant for hybridization. pedigree method was the best for improving rice lines than of the others.
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