Genetic architecture of leaf photosynthesis in rice revealed by different types of reciprocal mapping populations
| Autor: | Takayuki Ochiai, Naoto Ichihara, Shunsuke Adachi, Toshio Yamamoto, Takashi Ikka, Masaki Uchida, Chikako Otsuka, Kazuya Soda, Katsuhiko Kondo, Taiichiro Ookawa, Ryoji Karimata, Toshiyuki Takai, Tadamasa Ueda, Masahiro Yamashita, Tadashi Hirasawa, Toru Nakae, Risako Ao, Ruri Nakano |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
0301 basic medicine Stomatal conductance Physiology Quantitative Trait Loci Plant Science Quantitative trait locus phenology 01 natural sciences Japonica chromosome segment substitution line 03 medical and health sciences quantitative trait locus Backcross inbred line Inbred strain Cultivar Allele Alleles photosynthesis biology rice fungi Chromosome Mapping food and beverages Oryza yield biology.organism_classification Research Papers Genetic architecture Plant Leaves Horticulture 030104 developmental biology Crop Molecular Genetics stomatal conductance Backcrossing reciprocal mapping population nitrogen content 010606 plant biology & botany |
| Zdroj: | Journal of Experimental Botany |
| ISSN: | 1460-2431 0022-0957 |
| DOI: | 10.1093/jxb/erz303 |
| Popis: | Several reliable QTLs for leaf photosynthesis were detected using reciprocal mapping populations derived from japonica and indica rice varieties with different photosynthetic capacities. The improvement of leaf net photosynthetic rate (An) is a major challenge in enhancing crop productivity. However, the genetic control of An among natural genetic accessions is still poorly understood. The high-yielding indica cultivar Takanari has the highest An of all rice cultivars, 20–30% higher than that of the high-quality japonica cultivar Koshihikari. By using reciprocal backcross inbred lines and chromosome segment substitution lines derived from a cross between Takanari and Koshihikari, we identified three quantitative trait loci (QTLs) where the Takanari alleles enhanced An in plants with a Koshihikari genetic background and five QTLs where the Koshihikari alleles enhanced An in plants with a Takanari genetic background. Two QTLs were expressed in plants with both backgrounds (type I QTL). The expression of other QTLs depended strongly on genetic background (type II QTL). These beneficial alleles increased stomatal conductance, the initial slope of An versus intercellular CO2 concentration, or An at CO2 saturation. Pyramiding of these alleles consistently increased An. Some alleles positively affected biomass production and grain yield. These alleles associated with photosynthesis and yield can be a valuable tool in rice breeding programs via DNA marker-assisted selection. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|