Genetic Variation In Flowering Time of Soybean Based on DNA Markers

Flowering time is one of the important target traits in a soybean breeding program. Photoperiod and temperature influence the vegetative and reproductive development from emergence to maturity in soybean. The objective of this study was to analyze genetic variation in flowering time based on agronom...

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Bibliographic Details
Published inWorld journal of agricultural sciences : WJAS Vol. 13; no. 6; p. 220
Main Authors Tien, Huynh Van, Ngon, Truong Trong, Lee, Suk-Ha
Format Journal Article
LanguageEnglish
Published Dubai IDOSI Publications 01.01.2017
Subjects
Agronomy
Bayesian analysis
Cluster analysis
Cultivars
Deoxyribonucleic acid
DNA
Flowering
Genetic diversity
Latitude
Linkage disequilibrium
Loci
Longitude
Markers
Maturity
Plant breeding
Soybeans
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Summary:Flowering time is one of the important target traits in a soybean breeding program. Photoperiod and temperature influence the vegetative and reproductive development from emergence to maturity in soybean. The objective of this study was to analyze genetic variation in flowering time based on agronomic performance and SSR marker. One hundred and eight soybean cultivars evaluated in this study were collected from different geographic regions such as China, Japan, Korea and Vietnam. Days to flowering and maturity were recorded in two different field in Suwon, Korea (127°02’ E longitude, 37°26’ N latitude) and Can Tho, Vietnam (105°54’E longitude and 10°9’N latitude). Genotypic data were also collected at one-hundred and twenty six SSR loci. Genotypic variation was observed in flowering time. Results depicted that Vietnamese cultivars were more sensitive to day length. There was a large variation of maturity among cultivars. Chinese cultivar group was more diverse than the other groups. Through 126 observed loci, the number of amplified bands was common from four to six bands. R2 value used to estimate linkage disequilibrium (LD), varied according to LGs. It depends on the distance and number of observed loci. About 18 loci were associated closely with flowering time as well as maturity at p<10-4. Cluster analysis, based on Nei’s distance and Bayesian method, revealed that Vietnamese and Korean cultivar groups were quite different from the other groups; meanwhile Chinese and Japanese cultivar groups were close. These results will be useful for soybean variety improvement program in future.
ISSN:1817-3047
1817-5082