Identification of four functional component content QTLs of brown rice in the Yunnan mini-core collection and its near-isogenic lines using association mapping

Sorghum is a potential energy crop thanks to its high biomass productivity and low input. Biomass yield in sorghum is defined by height and maturity. To develop molecular breeding tools for genetic improvement of these two traits, we have identified simple sequence repeat markers linked to height and maturity using a pool-based association mapping technique. The sorghum mini core collection was evaluated across five environments for height and maturity. Seven tall and seven short accessions were selected based on their height in all environments. Likewise, six early- and 10 late-maturing accessions were selected mostly based on their maturity in two post-rainy seasons. Two additional height pools were constructed based on phenotypes in one environment. The three pairs of pools were screened with 703 SSR markers and 39 polymorphic markers were confirmed by individual genotyping. Association mapping of the 39 markers with 242 accessions from the mini core collection identified five markers associated with maturity or height. All were clustered on chromosomes 6, 9, and 10 with previously mapped height and maturity markers or QTLs. One marker associated with both height and maturity was 84 kb from recently cloned Ma1. These markers will lay a foundation for identifying additional height and maturity genes in sorghum.

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Association Mapping of Four Important Traits Using the USDA Rice Mini-Core Collection

Rice - Germplasm, Genetics and Improvement ◽

10.5772/56830 ◽

2014 ◽

Cited By ~ 1

Author(s):

Wengui Yan ◽

Aaron Jackson ◽

Melissa Jia ◽

Wei Zhou ◽

Haizheng Xiong ◽

...

Keyword(s):

Association Mapping ◽

Core Collection ◽

Mini Core Collection

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Genetic Variation And Association Mapping of Phenolic, Flavonoid Content And Antioxidant Capacity In USDA Rice Mini-Core Collection

10.21203/rs.3.rs-788391/v1 ◽

2021 ◽

Author(s):

Qingzhu Li ◽

Yongyi Ge ◽

Lily Yan Wang ◽

Kehu Li

Keyword(s):

Association Mapping ◽

Antioxidant Capacity ◽

Core Collection ◽

Phenolic Content ◽

Total Phenolics ◽

Genotypic Variation ◽

Genotypic Diversity ◽

Flavonoid Content ◽

Mini Core Collection ◽

Genome Wide

Abstract Genotypic diversity of total phenolics, flavonoid content and antioxidant capacity in the USDA rice mini-core collection was analyzed. Wide genotypic variation was found in total phenolics, flavonoid content and ABTS antioxidant capacity. Genome-wide association mapping between the three antioxidant traits and 155 SSR markers was conducted using Q + K model which takes both population structure (Q) and relative kinship (K) into consideration. A total of 23 marker trait association were identified with markers from Rc gene showed the strongest association with the three antioxidant traits. Rid12, RM484, RM162, RM5371 were commonly detected for phenolic content, flavonoids content and antioxidant capacity.

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