南方农业学报2011，Vol.42Issue(9)：1108-1111,4.
不同染色体倍性甜瓜种子萌发特性研究
Germination characteristics of melon seeds with different ploidy levels
摘要
Abstract
The germination characteristics of melon seeds with different ploidy levels were studied in order to cultivate polyploid melons and help in breeding programs to develop good melon varieties. [ Method ]Two diploid melon cultivars (thick-skinned melon Y2x and thin-skinned melon J2x) including their different ploidy levels (triploid crossed with 4x x 2x and autotetraploid induced with colchicine) were selected for studying their germination rate, germination index, vigor index, radicle length, hypocotyl length and number of lateral roots. [Result]The germination rate of diploid melon seeds was found to be higher than that of triploid and tetraploid melon seeds and the germination rate of thin-skinned melon seeds was higher than that of thick-skinned melon seeds. The order of germination index and vigor index of melon seeds with different ploidy levels was as follows: diploid > triploid > tetraploid. The thick-skinned melon showed higher vigor index compared to thin-skinned melon. The radicle and hypocotyl length and number of lateral roots increased with increasing germination time and decreased with increasing ploidy. [Conclusion ]The melon seeds with different ploidy levels differed in seed germination characteristics. The germination activity of melon seeds did not always increased with increasing ploidy levels. Diploid melon seeds showed higher germination percent compared to triploid and tetraploid melon seeds.关键词
甜瓜/二倍体/三倍体/四倍体/种子/萌发特性Key words
melon/ diploid/ triploid/ tetraploid/ seed/ germination characteristics分类
农业科技引用本文复制引用
黄金艳,李文信,洪日新,覃斯华,何毅,李天艳,樊学军..不同染色体倍性甜瓜种子萌发特性研究[J].南方农业学报,2011,42(9):1108-1111,4.基金项目
现代农业产业技术体系建设专项资金项目(CARS-26-19,CARS-26-36) （CARS-26-19,CARS-26-36）
广西科学技术研究与开发计划项目(桂科攻0779009) （桂科攻0779009）
广西自然科学基金项目(桂科自0991204) （桂科自0991204）
