Segregation distortion in F2 and doubled haploid populations of temperate japonica rice

2010 ◽  
Vol 89 (2) ◽  
pp. 237-241 ◽  
Author(s):  
Masumi Yamagishi ◽  
Yoshinobu Takeuchi ◽  
Isao Tanaka ◽  
Izumi Kono ◽  
Koji Murai ◽  
...  
Keyword(s):  
Segregation Distortion ◽  
Doubled Haploid ◽  
Japonica Rice ◽  
Temperate Japonica

scholarly journals Breeding Temperate Japonica Rice Varieties Adaptable to Tropical Regions: Progress and Prospects

Agronomy ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 2253
Author(s):  
Myrish Pacleb ◽  
O-Young Jeong ◽  
Jeom-Sig Lee ◽  
Thelma Padolina ◽  
Rustum Braceros ◽  
...  
Keyword(s):  
The Philippines ◽  
Tropical Region ◽  
Japonica Rice ◽  
Rice Varieties ◽  
Temperate Japonica ◽  
Tropical Regions ◽  
Tropical Environments ◽  
Increasing Demand ◽  
Northeast Asian ◽  
The Tropics

Temperate japonica rice is mainly cultivated in temperate regions. Many temperate japonica varieties have a superior grain quality that is preferred in Northeast Asian countries such as Japan, Korea, and China. The changes in consumers’ preferences in Southeast Asia and Western countries has contributed to increasing the demand for temperate japonica. Most temperate japonica varieties developed in temperate regions typically exhibit extra-early flowering under the short-day conditions in the tropics, which usually results in severely reduced yields. Since 1992, we have been developing temperate japonica varieties that can adapt to tropical environments to meet the increasing demand for temperate japonica rice, having released six varieties in the Philippines. Especially, the yield of one of the temperate japonica varieties, Japonica 7, was comparable to the yields of leading indica varieties in the Philippines. Here, we discuss the current breeding initiatives and future plans for the development of tropical-region-bred temperate japonica rice.

scholarly journals RFLP Linkage Map included the Information of Segregation Distortion in a Wide-Cross Population between Indica and Japonica Rice (Oryza sativa L.).

2000 ◽  
Vol 50 (2) ◽  
pp. 65-72 ◽  
Author(s):  
Yoshimichi Fukuta ◽  
Hideki Sasahara ◽  
Katsunori Tamura ◽  
Toshinori Fukuyama
Keyword(s):  
Oryza Sativa ◽  
Linkage Map ◽  
Segregation Distortion ◽  
Oryza Sativa L ◽  
Japonica Rice ◽  
Wide Cross

Blast resistance R genes pyramiding in temperate japonica rice

Euphytica ◽  
2020 ◽  
Vol 216 (3) ◽  
Author(s):  
Gabriele Orasen ◽  
Raffaella Greco ◽  
Enrico Puja ◽  
Carlo Pozzi ◽  
Maria Rosaria Stile
Keyword(s):  
Blast Resistance ◽  
Japonica Rice ◽  
R Genes ◽  
Temperate Japonica

Statistical assessment of the late marginal heading date for normal maturation of temperate japonica rice in South Korea

2014 ◽  
Vol 17 (4) ◽  
pp. 247-253 ◽  
Author(s):  
Junhwan Kim ◽  
Jiyoung Shon ◽  
Hanyong Jeong ◽  
Woonho Yang ◽  
Chung Kuen Lee ◽  
...  
Keyword(s):  
South Korea ◽  
Heading Date ◽  
Japonica Rice ◽  
Statistical Assessment ◽  
Temperate Japonica

Establishment and characterisation of wheat genetic mapping populations

2001 ◽  
Vol 52 (12) ◽  
pp. 1079 ◽  
Author(s):  
S. J. Kammholz ◽  
A. W. Campbell ◽  
M. W. Sutherland ◽  
G. J. Hollamby ◽  
P. J. Martin ◽  
...  
Keyword(s):  
Segregation Distortion ◽  
Doubled Haploid ◽  
Grain Quality ◽  
Genetic Relationships ◽  
Population Heterogeneity ◽  
Genetic Maps ◽  
Doubled Haploid Population ◽  
Sufficient Information ◽  
Quality Traits ◽  
Wide Cross

Doubled haploid populations from 5 carefully selected wheat (Triticum aestivum L.) crosses were established in order to produce genetic maps. The characterisation of the parental material included pedigree analyses to define the extent of the genetic relationships among the lines and to determine the occurrence of alien chromosome segments that may contribute to segregation distortion. The characterisation of the parents also defined the range of grain quality traits that could be examined in the lines derived from each cross. Populations of up to 321 lines were produced using wide cross-mediated doubled haploid production from F1 plants. Assessment of the lines for heterogeneity was carried out using readily identifiable phenotypic markers and electrophoresis of seed storage proteins, with 2.3–11.6% of the lines being removed from further analysis. Segregation distortion was estimated in several populations where sufficient information from genetic markers was available. In a Sunco/Tasman doubled haploid population, heterogeneity was detected between the first 51 lines and the remainder of the mapping population and this could be traced to F1 plants that were produced from an earlier set of crosses. χ2 tests on the mapping data available for the Cranbrook/Halberd, CD87/Katepwa, and Sunco/Tasman doubled haploid populations revealed segregation distortion at rates of 1.8%, 5.1%, and 12.5% respectively. Whereas the wide-cross doubled haploid protocol does not appear responsible for the bulk of the non-Mendelian segregation observed, several potential sources were identified. In particular, clustering of distorted loci at specific chromosome regions appeared to be associated with the presence of alien introgressions in one of the parents. This was especially marked in the Sunco/Tasman population. Providing such distortions are recognised in the models used, these populations provide powerful tools for extensive mapping studies to determine the genetic factors controlling grain quality traits and other wheat characters of interest.

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