A Study on 'Genomewide Selection' for Maize (Zea mays L.) Breeding in Japanese Public Sectors: Heritability of Maturity- and Yield-Related Traits in the Training Populations

JARQ : Japan Agricultural Research Quarterly
ISSN 00213551
書誌レコードID(総合目録DB) AA0068709X

The authors have considered introducing a molecular breeding technique called ‘genomewide selection (GwS)’ to effectively improve the yield of maize for whole-crop silage use. The GwS for this purpose requires training populations (TPs) where individual plants having been developed from three-way crosses are examined in their phenotypes as well as in molecular-marker genotypes. The purpose of this study was to evaluate the (broad-sense) heritability of maturity- and yield-related traits in such TPs, because a former simulation study by the authors showed that the heritability should exceed 25% for the success of the GwS. Five preliminary TPs were grown to estimate the heritability of silking date, ear dry weight and culm length from 2011 to 2013 on two planting density levels, the higher of which was for productivity testing and the lower for accurate individual phenotyping. The results indicated that heritability exceeded 25% in all cases, and that the higher planting density did not result in lower heritability. Accordingly, it was concluded that the maize GwS to improve yield is sufficiently feasible in terms of maintaining high heritability in the TPs, and that planting density for TPs should be that for productivity testing because it is known to have remarkable interaction on yield with genotypes.

作成者 TAMAKI Hiroyuki SATO Hisashi MITSUHASHI Shohei KIKAWADA Tomohiro

best linear unbiased prediction (BLUP)

culm length

inbred line

planting density

silking date

公開者 Japan International Research Center for Agricultural Sciences
国立情報学研究所メタデータ主題語彙集(資源タイプ) Journal Article
開始ページ 255
終了ページ 260
DOI 10.6090/jarq.49.255
権利 Japan International Research Center for Agricultural Sciences
言語 eng