An Innovative Strategy for Reciprocal Distant Hybridization between Spartina alterniflora and Rice

[Objective] This study aimed to explore germplasm resources of salt toler- ant Spartina alterniflora and high yield rice, and develop an innovative strategy for distant hybridization between S. altemiflora and rice. [Method] Crossing （rice ♀ ）： hot water emasculation and glume-cutting pollination method, heat emasculation and pollen-suction pollination method; reciprocal crossing （S. alterniflora ♀ glume-cutting emasculation and pollination method, continuous emasculation-pollination method, hot water emasculation and continuous emasculation-pollination method. [Result] In crossing groups （rice ♀ × S. alterniflora ♂ ）, compared with hot water emasculation and glume-cutting pollination treatment, the number of seed-bearing combinations, seed number per spike and seedling emergence rate in heat emasculation and pollen-suction pollination treatment were improved by 34.09%, 121.21% and 60.07%, respectively; hybridization efficiency was improved by 6-7 times. In reciprocal cross- ing groups （S. altemiflora ♀× rice ♂ ）, compared with glume-cutting emasculation and pollination treatment, the number of seed-bearing combinations and seed num- ber per spike in continuous emasculation-pollination treatment were improved by 3.14 and 4.21 times, respectively; seedling emergence rate was improved by 68.47%; hybridization efficiency was improved by 7-8 times. [Conclusion] Heat emas- culation and pollen-suction pollination method is suitable for hybridization between rice ♀× S. alterniflora ♂; continuous emasculation-pollination method is suitable for hybridization between S. alterniflora ♀× rice ♂.

沿海滩涂耐盐米草稻高产栽培技术

从水土资源利用、耕作改良、配套水系建设、种子选择及处理、水直播、苗床育秧、大田移栽、除草、肥水管理、病虫害防治等方面对沿海滩涂耐盐米草稻高产栽培技术进行总结。

High-yield Cultivation Technique of Salt-tolerant Spartina and Rice in Coastal Mudflat

Directing at the characteristics of coastal mudfiat saline and alkaline land, the yield of salt-tolerant Spartina and rice could reach 5 925-8 280 kg/hm^2 by the techniques of land and water resource utilization, farming improvement, construction of matched water system, seed selection and treatment, water direct seeding, seedling raising on seedbed, field transplanting, weeding, nutrient and water management, and disease and pest control, providing a scientific basis for the cultivation of Spartina and Rice in coast mudflat.

海涂大米草与水稻正反远缘杂交创新方法研究

发掘海涂大米草耐盐、水稻高产种质资源，创新大米草与水稻正反远缘杂交适用方法。本文研究了正交法（水稻♀温汤杀雄剪颖授粉法、热气杀雄吸花授粉法）和反交法（大米草♀剪颖去雄授粉法、连续去雄授粉法、温汤杀雄连续去雄授粉法）。结果表明，水稻辛热气去雄吸花授粉法比温汤杀雄剪颖授粉法结籽组合数提高103．23％，穗均结籽提高65．58％，出苗率提高88．67％，提高工效5～6倍；大米草♀连续去雄授粉法比剪颖去雄授粉法结籽组合数增加1．67倍，穗均结籽增加2．83倍，出苗率提高41．79％，提高工效6～7倍。水稻早热气去雄吸花授粉杂交法适用于水稻♀×大米草♂；大米草♀连续去雄授粉杂交法适用于大米草♀×水稻♂。