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- W2112121406 abstract "The mechanism by which reduced-height genes, Rht1 and Rht2 influence yield and harvest index (HI) were investigated in dwarf (D, Rht1Rht2), semidwarf (SD-1 and SD-2, Rht1rht2 and rht1Rht2, respectively), and tall (T, rht1rht2) near-isogenic lines (isolines) derived from winter wheat cv. Burt. Dry matter accumulation, yield, and assimilation, distribution, and retention of 14C label from photosynthetic assimilation of 14CO2, was followed in field-grown plants in Connecticut, USA. The relationships among the isolines were similar over the two years of study. The tall isoline ranked highest in grain yield and biomass, but had a small HI; SD-1 was similar to T in yield and biomass, but had the largest HI; SD-2 was similar to SD-1 in HI, but its yield and biomass were less than SD-1 and T; and D yielded the least grain and biomass and had a small HI similar to T. Following photosynthetic assimilation of 14CO2 during grain filling, the distribution of 14C in ears at maturity was similar for SD-1, SD-2, and T. When labelled shortly after anthesis or late in grain filling, the distribution of 14C to the mature ear of D was less than that for other isolines. At maturity D also retained the smallest amount of the radioactivity initially assimilated. The low yield and HI of D may be related to its inability to retain photosynthate and distribute it to the grain. The SD-1, SD-2, and T isolines did not differ in retention at maturity of 14C in the whole plant. When labelled shortly after anthesis, stems of T retained more 14C, which may represent a tendency to sequester more photosynthate in its stems that would reduce its HI at maturity. In contrast, the yield of SD-2 was limited by photosynthetic capacity." @default.
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- W2112121406 date "1989-02-01" @default.
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- W2112121406 title "Photosynthetic assimilation of<sup>14</sup>CO<sub>2</sub>and fate of<sup>14</sup>C-labelled photosynthate in winter wheat (Triticum aestivum) near-isoclines differing in alleles at the Rht<sub>1</sub>and Rht<sub>2</sub>reduced-height loci" @default.
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- W2112121406 doi "https://doi.org/10.1111/j.1744-7348.1989.tb06794.x" @default.
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