AI Article Synopsis
- The study focuses on identifying specific chromosome regions that link anther indehiscence (a key trait for hybrid rice) with stigma exertion.
- A mapping population of 189 plants was created from a cross between CRI-48 and Jasmine 85 to explore this genetic relationship.
- Results revealed a single genetic locus on chromosome 6 responsible for these traits, contradicting earlier beliefs of multiple genes being involved, with important SNP markers identified for further research.
Article Abstract
Anther indehiscence in certain wide crosses combines male sterility with stigma exertion, a phenomenon that is desirable for hybrid rice seed production. This study sought to identify chromosomal region(s) that combine anther indehiscence with exerted stigmas. A mapping population consisting of 189 BCF plants was derived from a cross between CRI-48 and Jasmine 85 and backcrossing the resulting F to Jasmine 85. Contrary to the three complementary genes mode of inheritance reported earlier, a single locus () was mapped on chromosome 6 at 27.4 cM for anther indehiscence with exerted stigmas through a mixed model-based composite interval mapping (MCIM). This locus was flanked by two single nucleotide polymorphism (SNP) markers, K_ID6002884 and K_ID6003341 within a range of 23.1-28.9 cM. The allele at the locus was contributed by the CRI-48 parent which has ancestry. This locus is suggested to control anther indehiscence and stigma exertion through pleiotropic gene action or cluster of genes.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7973294 | PMC |
| http://dx.doi.org/10.1016/j.heliyon.2021.e06483 | DOI Listing |
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