高低收穫指數選拔對水稻收穫指數及其他農藝性狀之效應

Responses of Harvest Index and Other Agronomic Traits to Selection for High and Low Harvest Index in Rice

林富雄(Fu-Hsiung Lin)

《花蓮區農業改良場研究彙報》 6期 (1990/03) Pp. 1-2

摘要

為瞭解選拔高收穫指數對稻谷產量之效果，以及選拔高及低收穫指數對其他水稻主要農藝特性之影響，本試驗利用水稻雜交組合高雄秈7號x白殼清油之F3，F4，F5，及F6世代做為試驗材料，選拔高及低收穫指數之兩個族群，以探討其選拔效果。試驗結果顯示F3植株之選拔證實其對F4後裔之選拔效果，選出之高收穫指數系統有較高產量，一穗粒數較多以及結實率高之傾向，同時具有株高較矮及早熟之特性。收穫指數遺傳率實際估值為0.64，指出從雜交後代族群中選拔高收穫指數之後代，以適當的親本做為材料時是有效的。

關鍵字

水稻 ； 收穫指數 ； 選拔

並列摘要

Responses to selection for high and low harvest indices were studied in the rice cross of Kaohsiung sen 7 x Pai-kuo-chin-yu. Selection of F3 plants proved effective producing effects on F4 progenies. Lines selected for higher harvest index tended to give higher grain yield, more spikelets per panicle and higher fertility and showed a height reduction and earliness of maturity. The heritability estimate for harvest index obtained in this experiment was quite high (64.3%), suggesting that in segregating populations selection for higher harvest index could be effective in breeding programs, if parental germplasms were chosen properly.

並列關鍵字

Rice ； Harvest index ； Selection