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- W2007469247 abstract "The variability among progeny in a plant breeding population depends on the amount of recombination that occurs in meiosis preceding selection. The recombination arises either from the independent assortment of chromosomes or from crossing over during chromosome synapsis. Crossing over is not a constant value; it differs based on background genotype. This research determined the effectiveness of three cycles of recurrent selection for increased or decreased crossing over in Zea mays L. Testcrosses measured male recombination frequency on three chromosomes: 4, su1‐c2 ; 5, a2‐bt1‐pr1 ; and 9, sh1‐bz1‐wx1 Sixty plants from each of three populations (cycle 0 [C 0 ], cycle 3 high recombination [C 3 HR], and cycle 3 low recombination [C 3 LR]) were evaluated. The mean recombination frequency changes between C 0 and C 3 HR are significant at all chromosome regions ( su1‐c2 , +5%; a2‐pr1 , +24%; sh1‐wx1 , +8%). The mean recombination frequency changes between C 0 and C 3 LR are significant at the chromosome 4 ( su1‐c2 ,‐15%) and 5 ( a2‐pr1 ,‐27%) linkage groups. The mean recombination frequency did not change significantly from C 0 to C 3 LR at either of the chromosome 9 regions. Compared to the C 0 population, the sum of the genetic distances at these chromosome regions increased 9.5% in the C 3 HR population and decreased 14.9% in the C 3 LR population. Selection for high or low recombination frequency successfully modified recombination frequency." @default.
- W2007469247 created "2016-06-24" @default.
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- W2007469247 date "2009-03-01" @default.
- W2007469247 modified "2023-09-27" @default.
- W2007469247 title "Three Cycles of Recurrent Selection for Altered Recombination Frequency in Maize" @default.
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- W2007469247 doi "https://doi.org/10.2135/cropsci2008.06.0319" @default.
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