Advanced Backcross QTL Analysis of Fiber Strength and Fineness in a Cross between Gossypium hirsutum and G. mustelinum
The molecular genetic basis of cotton fiber strength and fineness in crosses between and (Upland cotton) was dissected using 21 BC F and 12 corresponding BC F and BC F families. The BC F families were genotyped with simple sequence repeat markers from a by linkage map, and the three generations of B...
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Published in | Frontiers in plant science Vol. 8; p. 1848 |
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Main Authors | , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Switzerland
Frontiers Media S.A
25.10.2017
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Subjects | |
Online Access | Get full text |
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Summary: | The molecular genetic basis of cotton fiber strength and fineness in crosses between
and
(Upland cotton) was dissected using 21 BC
F
and 12 corresponding BC
F
and BC
F
families. The BC
F
families were genotyped with simple sequence repeat markers from a
by
linkage map, and the three generations of BC
-derived families were phenotyped for fiber strength (STR) and fineness (Micronaire, MIC). A total of 42 quantitative trait loci (QTLs) were identified through one-way analysis of variance, including 15 QTLs for STR and 27 for MIC, with the percentage of variance explained by individual loci averaging 13.86 and 14.06%, respectively. Eighteen of the 42 QTLs were detected at least twice near the same markers in different generations/families or near linked markers in the same family, and 28 of the 42 QTLs were identified in both mixed model-based composite interval mapping and one-way variance analyses. Alleles from
increased STR for eight of 15 and reduced MIC for 15 of 27 QTLs. Significant among-family genotypic effects (
< 0.001) were detected in 13 and 10 loci for STR and MIC respectively, and five loci showed significant (
< 0.001) genotype × family interaction for MIC. These results support the hypothesis that fiber quality improvement for Upland cotton could be realized by introgressing
alleles although complexities due to the different effects of genetic background on introgressed chromatin might be faced. Building on prior work with
, and
, QTL mapping involving introgression of
alleles offers new allelic variation to Upland cotton germplasm. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 Edited by: Hiroyoshi Iwata, University of Tokyo, Japan Present Address: O. Lloyd May, Monsanto Cotton Breeding, Tifton, GA, United States Reviewed by: Marco Maccaferri, Consiglio per la Ricerca in Agricoltura e l'analisi Dell'economia Agraria (CREA), Italy; Elena Bitocchi, Università Politecnica delle Marche, Italy; Shiori Yabe, Institute of Crop Science (NARO), Japan This article was submitted to Plant Breeding, a section of the journal Frontiers in Plant Science |
ISSN: | 1664-462X 1664-462X |
DOI: | 10.3389/fpls.2017.01848 |