Genetic distance of inbred lines of Chinese cabbage and its relationship to heterosis

Kawamura, K; Kawanabe, T; Shimizu, M; Nagano, AJ; Saeki, N; Okazaki, K; Kaji, M; Dennis, ES; Osabe, K; Fujimoto, R

Genetic distance of inbred lines of Chinese cabbage and its relationship to heterosis

Kawamura, K Kawanabe, T Shimizu, M Nagano, AJ Saeki, N Okazaki, K Kaji, M Dennis, ES

Osabe, K Fujimoto, R

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Publication Type:: Journal Article
Citation:: Plant Gene, 2016, 5 pp. 1 - 7
Issue Date:: 2016-03-01

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Field	Value	Language
dc.contributor.author	Kawamura, K	en_US
dc.contributor.author	Kawanabe, T	en_US
dc.contributor.author	Shimizu, M	en_US
dc.contributor.author	Nagano, AJ	en_US
dc.contributor.author	Saeki, N	en_US
dc.contributor.author	Okazaki, K	en_US
dc.contributor.author	Kaji, M	en_US
dc.contributor.author	Dennis, ES https://orcid.org/0000-0002-7850-591X	en_US
dc.contributor.author	Osabe, K	en_US
dc.contributor.author	Fujimoto, R	en_US
dc.date.issued	2016-03-01	en_US
dc.identifier.citation	Plant Gene, 2016, 5 pp. 1 - 7	en_US
dc.identifier.uri	http://hdl.handle.net/10453/117287
dc.description.abstract	© 2015 The Authors. Chinese cabbage (Brassica rapa L. var. pekinensis) is an important vegetable in Asia. Most Japanese commercial cultivars of Chinese cabbage use an F1 hybrid seed production system because of the high yielding cultivars produced. An efficient method for predicting hybrid performance in the parental generations is desired, and genetic distance between parental lines might be a good indicator of the level of hybrid vigor in a cross. Information concerning the genetic relationships among parental candidate inbred lines is useful for variety protection. The number of DNA markers available that can be used to assess the purity of inbred lines is limited in B. rapa. The aim of this study is to use DNA markers to assess the genetic distance between inbred lines to examine early developmental and yield heterosis so as to develop methods for selecting the best parental lines for the production of hybrids. We screened highly polymorphic SSR and CAPS markers to assess the genetic uniformity of inbred lines and characterize their genetic relationship. We examined the early size and yield heterosis in 32 F1 hybrids of Chinese cabbage. There was a moderate correlation in mid-parent heterosis between leaf size at 21 days after sowing and harvested biomass but not in best-parent heterosis. In contrast there was no correlation between genetic distance and mid-parent or best-parent heterosis, indicating that genetic distance does not predict the heterosis phenotype.	en_US
dc.relation.ispartof	Plant Gene	en_US
dc.relation.isbasedon	10.1016/j.plgene.2015.10.003	en_US
dc.title	Genetic distance of inbred lines of Chinese cabbage and its relationship to heterosis	en_US
dc.type	Journal Article
utslib.citation.volume	5	en_US
utslib.for	0604 Genetics	en_US
utslib.for	060705 Plant Physiology	en_US
utslib.for	0607 Plant Biology	en_US
utslib.for	0703 Crop and Pasture Production	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Life Sciences
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US
pubs.volume	5	en_US

Abstract:

© 2015 The Authors. Chinese cabbage (Brassica rapa L. var. pekinensis) is an important vegetable in Asia. Most Japanese commercial cultivars of Chinese cabbage use an F1 hybrid seed production system because of the high yielding cultivars produced. An efficient method for predicting hybrid performance in the parental generations is desired, and genetic distance between parental lines might be a good indicator of the level of hybrid vigor in a cross. Information concerning the genetic relationships among parental candidate inbred lines is useful for variety protection. The number of DNA markers available that can be used to assess the purity of inbred lines is limited in B. rapa. The aim of this study is to use DNA markers to assess the genetic distance between inbred lines to examine early developmental and yield heterosis so as to develop methods for selecting the best parental lines for the production of hybrids. We screened highly polymorphic SSR and CAPS markers to assess the genetic uniformity of inbred lines and characterize their genetic relationship. We examined the early size and yield heterosis in 32 F1 hybrids of Chinese cabbage. There was a moderate correlation in mid-parent heterosis between leaf size at 21 days after sowing and harvested biomass but not in best-parent heterosis. In contrast there was no correlation between genetic distance and mid-parent or best-parent heterosis, indicating that genetic distance does not predict the heterosis phenotype.

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http://hdl.handle.net/10453/117287