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Identification of QTL for Popping Characteristics Using a BC2F2 Population and Comparison with Its F2:3 Population in Po
Normal corn germplasm can be used to improve popcorn (Zea mays L.) through 1-2 backcrosses with popcorn as recurrent parents. Popping characteristics of derived lines from popcorn x dent or flint corn crosses play a determinant role in popcorn breeding. Advanced backcross QTL methods can effectively combine QTL identification and plant breeding. 220 selected BC2F2 families developed from a cross between Dan 232, a dent corn inbred line, and N04, an elite popcorn inbred line, were evaluated for three popping characteristics, popping volume, flake size, and popping rate, under two environmental conditions. Using composite interval mapping, a total of 10 significant QTLs were detected, and of these, 2 to 4 QTLs were identified for each trait. Six QTLs had favorable alleles contributed by Dan 232. Comparison with the 15 QTLs detected in the F2:3 families showed that 3 QTLs were the same in both populations. The QTLs should be redetected in generations developed through severe selection. Improved N04 and near isogenic lines could be developed from this BC2F2 population through selfing or another 1 to 2 backcrosses with N04.
作 者： LI Yu-ling DONG Yong-bin NIU Su-zhen CUI Dang-qun 作者单位： Agronomy College, Henan Agricultural University, Zhengzhou 450002, P.R.China 刊 名： 中国农业科学（英文版） 英文刊名： AGRICULTURAL SCIENCES IN CHINA 年，卷(期)： 2009 8(2) 分类号： S1 关键词： Zea mays L. popcorn BC2F2 population quantitative trait loci popping characteristics【Identification of QTL for Popping Ch】相关文章：
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