In:
Ecology and Evolution, Wiley, Vol. 5, No. 21 ( 2015-11), p. 5007-5015
Abstract:
Due to severe water resource shortage, genetics of and breeding for DT (drought tolerance) in rice ( Oryza sativa L.) have become one of the hot research topics. Identification of grain yield QTL s (quantitative trait loci) directly related to the DT trait of rice can provide useful information for breeding new drought‐resistant and water‐saving rice varieties via marker‐assisted selection. A population of 105 advanced BIL s (backcross introgression lines) derived from a cross between Zhenshan97B and IRAT 109 in Zhenshan97B background were grown under drought stress in a field experiment and phenotypic traits were investigated. The results showed that in the target interval of RM 273‐ RM 255 on chromosome 4, three main‐effect QTL s related to panicle length, panicle number, and spikelet number per panicle were identified ( LOD [logarithm of the odds] 〉 2.0). The panicle length‐related QTL had two loci located in the neighboring intervals of RM 17308‐ RM 17305 and RM 17349‐ RM 17190, which explained 18.80% and 20.42%, respectively, of the phenotypic variation, while the panicle number‐related QTL was identified in the interval of RM 1354‐ RM 17308, explaining 11.47% of the phenotypic variation. As far as the spikelet number per panicle‐related QTL was concerned, it was found to be located in the interval of RM 17308‐ RM 17305, which explained 28.08% of the phenotypic variation. Using the online Plant‐ GE query system, a total of 13 matched EST s (expressed sequence tags) were found in the target region, and of the 13 EST s, 12 had corresponding predicted genes. For instance, the two EST s CB 096766 and CA 765747 were corresponded to the same predicted gene LOC _Os04g46370 , while the other four EST s, CA 754286, CB 000011, CX 056247, and CX 056240, were corresponded to the same predicted gene LOC _Os04g46390 .
Type of Medium:
Online Resource
ISSN:
2045-7758
,
2045-7758
DOI:
10.1002/ece3.2015.5.issue-21
Language:
English
Publisher:
Wiley
Publication Date:
2015
detail.hit.zdb_id:
2635675-2
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