QTL mapping of male sterility and transmission pattern in progeny of Satsuma mandarin

PloS One
Shingo GotoTokurou Shimizu

Abstract

Seedlessness is one of the important traits in citrus breeding. Male sterility derived from Satsuma mandarin (Citrus unshiu) has been used in Japanese citrus breeding programs to obtain seedless cultivars. The efficiency of seedless cultivar breeding would be improved by developing a selection marker linked to seedlessness. In this study, we performed QTL mapping in 'Okitsu No. 46' × 'Okitsu No. 56' (O46-O56) crosses for the number of pollen grains per anther (NPG) and apparent pollen fertility (APF), two traits used as an index of male sterility, and detected a candidate QTL for NPG (MS-P1) on linkage group 8 with a significant LOD score (7.31) and 47% of variance explained. The QTL for APF (MS-F1) was detected on linkage group 6 with a significant LOD score (5.71) and 63.6% of variance explained. The role of both MS-P1 in reducing NPG and MS-F1 in decreasing APF were confirmed with the 'Okitsu No.46' × 'Kara' (O46-K) cross. Pedigree analysis inferred that both MS-P1 and MS-F1 in 'Okitsu No. 46' were derived from kunenbo (Citrus nobilis) through hassaku (C. hassaku) and 'Sweet Spring'. Cytoplasm analysis revealed that both male-sterile 'Sweet Spring' and 'Okitsu No. 46' have cytoplasm derived from Kishu (C. kinokuni hort. ex T...Continue Reading

References

Feb 14, 2006·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Chunxian ChenFred G Gmitter
May 28, 2011·American Journal of Botany·Frédérique OllitraultPatrick Ollitrault
Apr 14, 2016·Breeding Science·Mitsuo Omura, Takehiko Shimada
Jun 21, 2017·Journal of the Science of Food and Agriculture·Livnat GoldenbergNir Carmi

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Methods Mentioned

BETA
genotyping

Software Mentioned

GUGS ( General Utilities for Genotyping Study )
JoinMap
MapQTL
R stats

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