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Substitution Mapping of the Major Quantitative Trait Loci Controlling Stigma Exsertion Rate from Oryza glumaepatula
Background Stigma exsertion rate (SER) is a key determinant for the outcrossing ability of male sterility lines (MSLs) in hybrid rice seed production. In the process of domestication, the outcrossing ability of cultivated rice varieties decreased, while that of wild Oryza species kept strong. Here,...
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Published in: | Rice 2020-06, Vol.13 (1), p.37-37, Article 37 |
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Main Authors: | , , , , , , , , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Background
Stigma exsertion rate (SER) is a key determinant for the outcrossing ability of male sterility lines (MSLs) in hybrid rice seed production. In the process of domestication, the outcrossing ability of cultivated rice varieties decreased, while that of wild
Oryza
species kept strong. Here, we detected the quantitative trait loci (QTLs) controlling SER using a set of single-segment substitution lines (SSSLs) derived from
O. glumaepatula
, a wild
Oryza
species.
Results
Seven QTLs for SER were located on 5 chromosomes.
qSER-1a
and
qSER-1b
were located on chromosome 1.
qSER-3a
and
qSER-3b
were mapped on chromosome 3, and
qSER-3b
was further located at an estimated interval of 898.8 kb by secondary substitution mapping.
qSER-5
,
qSER-9
and
qSER-10
were identified on chromosomes 5, 9 and 10, respectively, and
qSER-9
was delimited to an estimated region of 551.9 kb by secondary substitution mapping. The additive effects of the 7 QTLs ranged from 10.6% to 14.8%, which were higher than those of most loci for SER reported previously.
Conclusions
qSER-1a
and
qSER-1b
are novel loci for SER on chromosome 1. All of the 7 QTLs have major effects on SER. The major QTLs of SER will help to develop MSLs with strong outcrossing ability. |
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ISSN: | 1939-8425 1939-8433 1934-8037 |
DOI: | 10.1186/s12284-020-00397-1 |