延长生育期能克服远缘杂种不育性的机理,以及在远缘杂交工作中如何应用延长生育期克服杂种的不育性的具体方法,过去未有过详细报道。本文以普通小麦×天兰偃麦草为例,对上述问题作初步探讨。延长生育期是克服远缘杂种不育的有效方法普通小麦(2n=42)与天兰假麦草(2n=42)的杂种 F_1的不育性是极高的。我们 The mechanism of prolonging the growth period to overcome the distant hybrid sterility and how to apply the method of extending the growth period to overcome the sterility of hybrids in distant hybridization have not been reported in detail in the past. In this paper, an ordinary wheat × Thinopyrum elongatum as an example, the preliminary study of the above problems. Prolonging the growth period is an effective way to overcome the distant hybrid sterility. The sterility of hybrid F 1 between common wheat (2n = 42) and Tianran pseudo wheat (2n = 42) is extremely high. we