2001•Zajiao shuidaoRequires access
Breeding of eui-CMS Line II-32eA(1) in Indica Rice
Qingqi Zhang
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Abstract
The dried seeds of Ⅱ-32 B (maintainer line) were treated with γ rays of 60Co at 25 and 35 Gy, respectively and two types of recessive tall mutants with elongated uppermost internode (eui) genes were obtained from the M 2 population. They are named as Ⅱ-32eB(1) and Ⅱ-32eB(2), respectively. By crossing Ⅱ-32eB(1) with Ⅱ-32 A and then successively backcrossing with Ⅱ-32eB(1), Ⅱ-32eA(1) with eui (1) gene was developed successfully. Compared with Ⅱ-32A, Ⅱ-32eA(1) has elongated upper internodes resulting in no panicle enclosure, elongated spikelets, higher stigma exsertion rate and is more sensitive to GA 3. Ⅱ-32eA(1) has been technically examined in September of 1999.