AI Article Synopsis
- - The study focused on understanding the genetic factors behind seed shattering and dormancy in a rice strain called Hokuriku 193, leading to the development of a near isogenic line (NIL) with improved traits.
- - Genetic analysis indicated that specific loci were strongly linked to seed shattering, while quantitative trait loci (QTLs) for seed dormancy were found on chromosomes 1, 3, and 6, particularly favoring regions that enhance dormancy when combined with Hokuriku 193's genetics.
- - The newly developed NIL (SSDo_NIL) showed no seed shattering and a significantly higher germination rate compared to Hokuriku 193, with similar yield performance, indicating that
Article Abstract
In this study, we investigated the genetic basis of seed shattering and dormancy in Hokuriku 193 and bred an NIL improved these traits. Analysis of an F population from Hokuriku 193 × Koshihikari revealed a general correspondence between seed shattering and genotypes at the locus, suggesting a strong influence of this locus on the seed shattering in Hokuriku 193. An F population from [ms-bo] Nekken 2 × Hokuriku 193 was also analyzed to identify quantitative trait loci (QTLs) for seed dormancy as measured by germination rate in the first December and March after seed harvest. The results revealed a concurrence QTLs of on chromosomes 1, 3, and 6 (, , ). In particular, and were considered regions worthy of active modification because they were QTL regions that promoted seed dormancy when carrying Hokuriku 193 genome regions around. SSDo_NIL, a near isogenic line (NIL) derived from Hokuriku 193 by introgressing Nekken 2 alleles only at the locus and , did not shatter, and its germination rate was significantly higher than that of Hokuriku 193. Yield performance was similar between SSDo_NIL and Hokuriku 193, suggesting that improvement of seed shattering and dormancy does not affect yield.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5515305 | PMC |
| http://dx.doi.org/10.1270/jsbbs.16128 | DOI Listing |
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