Inheritance of root traits and phosphorus uptake in common bean (Phaseolus vulgaris L.) under limited soil phosphorus supply |
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| Authors: | Adelson Paulo Araújo Irajá Ferreira Antunes Marcelo Grandi Teixeira |
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| Institution: | (1) Department of Crop Sciences, University of Illinois, 1102 South Goodwin Avenue, Urbana, IL, 61801, U.S.A.;(2) Department of Crop Sciences, USDA-ARS-MWA, 1102 S. Goodwin, Urbana, IL, 61801, U.S.A.;(3) Institute of Food Crops, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, P.R. China;(4) Present address: Lethbridge Research Center, Agriculture and Agri-Food Canada, Box 3000, 5403-1st Avenue, Lethbridge, Alberta, T1J 4B1, Canada |
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| Abstract: | Heterosis is an important way to improve yield and quality for many crops. Hybrid rice and hybrid maize contributed to enhanced productivity which is essential to supply enough food for the increasing world population. The success of hybrid rice in China has led to a continuous interest in hybrid wheat, even when most research on hybrid wheat has been discontinued in other countries for various reasons including low heterosis and high seed production costs. The Timopheevii cytoplasmic male sterile system is ideal for producing hybrid wheat seeds when fertility restoration lines with strong fertility restoration ability are available. To develop PCR-based molecular markers for use in marker-assisted selection of fertility restorer lines, two F2 populations derived from crosses R18/ND36 and R9034/ND36 were used to map fertility restoration genes in the two elite fertility restorer lines (R-lines) R18 and R9034. Over 678 SSR markers were analyzed, and markers closely linked to fertility restoration genes were identified. Using SSR markers, a major fertility restoration gene, Rf3, was located on the 1B chromosome in both populations. This gene was partially dominant in conferring fertility restoration in the two restorer lines. SSR markers Xbarc207, Xgwm131, and Xbarc61 are close to this gene. These markers may be useful in marker-assisted selection of new restorer lines with T. timopheevii cytoplasm. Two minor QTL conferring fertility restoration were also identified on chromosomes 5A (in R18) and 7D (in R9034) in two R-lines. |
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| Keywords: | fertility restoration gene hybrid wheat marker-assisted selection molecular mapping Rf3 SSR markers |
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