QTL analysis of drought tolerance traits in rice during the vegetative growth period
Drought affects the growth and development of rice from direct seeding or transplanting to maturity in northern China. It is important to carry out QTL mapping for drought tolerance to improve rice breeding. In this study, a rice RIL population consisting of 253 families was constructed by crossing...
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Published in | Euphytica Vol. 219; no. 3; p. 33 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Dordrecht
Springer Netherlands
01.03.2023
Springer Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | Drought affects the growth and development of rice from direct seeding or transplanting to maturity in northern China. It is important to carry out QTL mapping for drought tolerance to improve rice breeding. In this study, a rice RIL population consisting of 253 families was constructed by crossing Miyang 23 with Jileng 1. The leaf rolling index (LRI), leaf withering degree (LWD) and leaf chlorophyll content (LCC) were measured over three years, and QTLs for these traits were mapped. The results showed that LRI, LWD and LCC were all quantitative traits controlled by multiple genes. A total of 28 QTLs related to three drought-resistant indices were detected; four QTLs controlling LRI and LWD were detected on Chromosome 1.
qLRI1-1
and
qLWD1-4
were located in the interval of AH01001843-RM302, explaining 10.30% and 4.90% of the phenotypic variation, respectively;
qLWD1-2
B
and
qLRI-1J
C
were both located in RM315-S01167A, and
qLWD1-2
B
was explained 11.15% of the phenotypic variation, while
qLRI-1J
C
explained 7.96% of the phenotypic variation. The two QTLs located on Chromosome 5,
qLWD5-1
B
and
qLRI5
, were located in CMB0526.3486-RM87.
qLWD5-1
B
explained 6.93% of the phenotypic variation, while
qLRI5
explained 8.79%-9.13% of the phenotypic variation. The two QTLs detected on Chromosome 12,
qLWD12
and
qLRI12
, were located in the S12099-CMB1226.0 interval and explained 4.59%-7.25% of the phenotypic variation. The above QTLs, including
qLWD1-2
B
,
qLRI1-1J
C
,
qLWD5-1
B
and
qLRI5
, have been detected many times. Future work should involve implementing in-depth fine mapping of these QTLs and using the identified markers in the drought resistance molecular marker selection breeding of rice. |
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ISSN: | 0014-2336 1573-5060 |
DOI: | 10.1007/s10681-022-03151-4 |