水稻臺農67號大粒isogenic系統之育成初報

A Pereliminary Report on Developing Larger-seed Isogenic Line of Rice Variety, Tainung No. 67

郭益全(Y. C. Kuo) ； 張德梅(T. M. Chang)

《中華農業研究》 34卷4期 (1985/12) Pp. 402-409

https://doi.org/10.29951/JARC.198512.0003

摘要

以糙米百粒重2.0g左右之臺農67號及3.5g左右之Pegonil兩品種爲親本，其正反交之兩F1後代再與輪迴親本臺農67號連續同交，期育成臺農67號大粒isogenic系統。本文即在初步報導此育成過程中之若干結果。F1數據顯示糙米百粒重無正反交之差異。TNG 67/Pegonil/TNG 67集團糙米百粒重平均爲3.09g，集團常態分布於兩親本間；反之，Pegonil/TNG 67^2之糙米百粒重僅達2.29g，集團分布集中且靠近輕百粒重觀本臺農67號。穗數、一穗穎花數及單株糙米產量等重要性狀TNG 67/Pegonil/TNG 67集團者均較Pegonil/TNG67^2集團者爲低。綜合考慮此等初步結果認爲育成臺農67號大粒isogenic系統以繼續臺農67號爲母本之後代集團之選株連續同交輪迴親臺農67號較有希望。

並列摘要

The present experiment is aimed to develop the larger-seed isogenic line of Tainung No. 67 (TNG 67), which is now the most popular variety in Taiwan. In the F1 crosses between TNG 67 (2.0g/100-brown-rice) and Pegonil (3.5g/100-brown-rice), no significant difference was observed in sees size between the reciprocal crosses. In the BC1 generation of TNG 67JPegonilJTNG 67, seed size distributed normally with a mean value of 3.09 g/100-brown-rice. However, in the population of Pegonil/TNG 67^2, seed size distributed skewly toward TNG 67 with a smaller mean value of 2.29 g/100-brown-rice. Characters such as panicle number per hill, spikelet number per panicle and bro wnrice yield per plant in the population of TNG 67/Pegonil/TNG 67 were all found to be smaller than those in the population of Pegonil/TNG 67^2.
From this preliminary study, it is conclued that developing a larger-seed isogenic line of Tainung No. 67 by repeated back cross and using TNG 67 as the recurrent parent and Pegonil as the donor parent should be promising.