Identifying key traits in high-yielding rice cultivars for adaptability to both temperate and tropical environments
| Autor: | Patrick Lumanglas, Hidetoshi Asai, Toshiyuki Takai, Eliza Vie Simon, Nobuya Kobayashi, Yumiko Arai-Sanoh |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Germplasm 0303 health sciences Biplot media_common.quotation_subject lcsh:S Tropics Plant Science Biology 01 natural sciences lcsh:S1-972 Transgressive segregation Adaptability lcsh:Agriculture 03 medical and health sciences Agronomy Temperate climate Cultivar lcsh:Agriculture (General) Agronomy and Crop Science 030304 developmental biology 010606 plant biology & botany Panicle media_common |
| Zdroj: | Crop Journal, Vol 7, Iss 5, Pp 685-693 (2019) SC30202005260008 NARO成果DBa |
| ISSN: | 2214-5141 |
| Popis: | Increasing rice yield potential is a continuous challenge posed by world population growth. To increase yield potential, favorable alleles of valuable genes need to be accumulated in promising germplasm. We conducted comparative yield trials for two years in Tsukuba, Japan, in a temperate region and at the International Rice Research Institute (IRRI), Philippines, in a tropical region using five high-yielding rice cultivars: Takanari and Hokuriku193, developed in Japan, and IR64, NSIC Rc158, and YTH183, developed in the Philippines. Genotype plus genotype × environment interaction (GGE) biplot analysis across four environments (two regions × two seasons) classified the five cultivars into four categories: Takanari and YTH183 showed high adaptability to both tropical and temperate regions, Hokuriku193 was suitable for temperate regions, NSIC Rc158 was suitable for the tropics, and IR64 was inferior to the other cultivars in both regions. The high yield and adaptability in Takanari and YTH183 were attributed to their large sink capacity with good grain filling. The plant type for high yield was different, however, between the two cultivars; Takanari was a panicle-weight type, whereas YTH183 was a panicle-number type. Evaluations of F2 progeny of a cross between Takanari and YTH183 showed transgressive segregation for number of panicles per plant as well as number of spikelets per panicle, leading some F2 plants to produce more spikelets per plant (corresponding to larger sink size) than the parental cultivars in both regions. These results suggest the possibility of developing rice cultivars with high yield potential in both temperate and tropical regions by crossing temperate with tropical high-yielding cultivars. Keywords: Adaptability, Genotype × environment interaction, Rice, Sink capacity, Yield potential |
| Databáze: | OpenAIRE |
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