CAJ | 학술논문

小野1A是由小粒野生稻（Oryza minuta Presl.）中天然不育株与Y58S/内香B杂种后代优秀单株经多代回交转育而成。由于该雄性不育细胞质来自小粒野生稻，称为XY型雄性不育细胞质。恢保关系鉴定结果表明， XY 型细胞质雄性不育系与野败型（WA）、印尼水田谷型（ID）、K 型和红莲型（HL）细胞质雄性不育系的恢保关系不同， WA型、ID型、K型和HL型的保持系和恢复系中部分可以作为XY型雄性不育细胞质的保持系，部分可以作为XY型雄性不育细胞质的恢复系。XY型雄性不育细胞质突破了WA型、ID型、K型和HL型等雄性不育细胞质的恢保关系，扩大了保持系育种范围，可以用品质优良的栽培品种培育出高标准优质米不育系。由此可见，XY 型雄性不育细胞质的发掘，不仅丰富了杂交稻细胞质遗传多样性，而且为培育高标准优质米不育系、进而实质性提高杂交稻稻米品质开辟了一条崭新的育种途径。
소야1A시유소립야생도（Oryza minuta Presl.）중천연불육주여Y58S/내향B잡충후대우수단주경다대회교전육이성。유우해웅성불육세포질래자소립야생도，칭위XY형웅성불육세포질。회보관계감정결과표명， XY 형세포질웅성불육계여야패형（WA）、인니수전곡형（ID）、K 형화홍련형（HL）세포질웅성불육계적회보관계불동， WA형、ID형、K형화HL형적보지계화회복계중부분가이작위XY형웅성불육세포질적보지계，부분가이작위XY형웅성불육세포질적회복계。XY형웅성불육세포질돌파료WA형、ID형、K형화HL형등웅성불육세포질적회보관계，확대료보지계육충범위，가이용품질우량적재배품충배육출고표준우질미불육계。유차가견，XY 형웅성불육세포질적발굴，불부봉부료잡교도세포질유전다양성，이차위배육고표준우질미불육계、진이실질성제고잡교도도미품질개벽료일조참신적육충도경。
Xiaoye 1A was obtained through nuclear substitution of the natural male sterile individuals from Oryza minuta Presl. with the nuclear of outstanding progenies of Y58S/ Neixiang B by backcrosses. Because of the male sterile cytoplasm derived fromOryza minuta Presl., it’s named as the XY type male sterile cytoplasm. The results showed that the male sterile line with XY cytoplasm was different from WA, ID, K and HL male sterile lines(table 2 and table 3) in the relationship between restorer lines and maintainer lines. Part restorer and maintainer lines of WA, ID, K and HL could be used as the maintainer lines of XY cytoplasmic sterile line, and parts of them could be used as its restorer lines. It was a newly found resource of rice male sterile cytoplasm. XYcytoplasm was free from the genetic confinement of the relationship between the restorer lines and maintainer lines of WA,ID, K and HL, enlarging the circle of maintainer lines so that good cultivated cultivars could be developed into fine male sterile lines. Therefore, the creation of the XY type sterile cytoplasm, not only enriches the genetic diversities of hybrid rice, but also opens up a new way to breed the high standard of fine quality male sterile lines, and substantially improve the grain quality of hybrid rice.