Manifestation of Hybrid Vigor in Rice
Other Title
水稻雜種優勢之表現
Journal
農業研究
Journal Volume
20
Journal Issue
4
Start Page
8
End Page
23
Date Issued
1971-12-02
Date
1971-12-02
Author(s)
W.L. Chang
E.H. Lin
C.N. Yang
張萬來
林恩輝
楊建南
Abstract
The manifestation of heterosis for grain yield, yield components and several important agronomic characters by a group of 265 F1 hybrids of rice over a six-crop period from the second crop of 1967 to the first crop of 1970 are reported. Among 265 F1 hybrids evaluated, a total of 192 or 72.5% of the total hybrids outyielded their mid-parent and check varieties while grain yield of 145 or 54.7% of the hybrids exceeded their respective high-parent. The average heterosis for these outstanding F1 hybrids was 20.3, 19.1 and 18.3% in relation to mid-parent, check varieties and high-parent, respectively. However, the magnitude of hybrid advantage over the mid-parent and check varieties reduced to 10.6 and 6.3% respectively when the average data of the six crops were considered. The superiority of F1 hybrids over high-parent was also reduced to nil when averaged over all entries. The number of panicles per plant and the number of grains per panicle were found to be the most important components associated with the manifestation of heterosis for grain yield.
本文係報告自民國56年第2期作至民國59年第一期作觀察265個F1雜種對稻谷產量，產量構成因素，及其他主要農藝性狀所表現雜種優勢之結果，在供試F1中，有192個或72.5%之F1，其稻谷產量超過中間親本及標準對照品種，其平均雜種優勢分別爲20.3與19.1%。又有145個或54.7%F1，其稻谷產量超過高產量親本，其平均雜種優勢爲18.3%。惟全部供試F1之平均雜種優勢只分別超過中間親本及對照品種10.6與6.3%，而對高產量親本則未見呈現絲毫雜種優勢。在產量構成因素中，以每株穗數及每穗粒數兩性狀對稻谷產量雜種優勢之表現，貢獻最大。
Publisher
農業試驗所
Type
journal article
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