Meiotic restriction in emmer wheat is controlled by one or more nuclear genes that continue to function in derived lines

作者：Zhang Lian Quan; Yen Yang^*; Zheng You Liang; Liu Deng Cai

来源：Sexual Plant Reproduction, 2007, 20(3): 159-166.

DOI：10.1007/s00497-007-0052-x

• Aegilops tauschii
• Aegilops variabilis
• rye
• synthetic hexaploid wheat
• T. turgidum ssp turgidum
• unreduced gametes
• mitosis-like meiosis

Highly fertile F-1 hybrids were made between Triticum turgidum L. ssp. turgidum (2n = 28, AABB) and Aegilops tauschii Coss. (2n = 14, DD) without embryo rescue and hormone treatment. The F-1 plants had an average seed set of 25%. Approximately 96% of the F-2 seeds were able to germinate normally and about 67% of the F-2 plants were spontaneous amphidiploid (2n = 42, AABBDD). Cytological analysis of male gametogenesis of the F-1 plants showed that meiotic restitution is responsible for the high fertility. A mitosis-like meiosis led to meiotic restitution at either of the two meiotic divisions resulting in unreduced gametes. Test crosses of the T. t. turgidum-Ae. tauschii amphidiploid with Ae. variabilis and rye suggested that the mitosis-like meiosis is controlled by one or more nuclear genes that continue to function in derived lines. This discovery indicates a potential application of such genes in producing double haploids.

• 出版日期2007-9
• 单位四川农业大学