小麦品种演化与远缘杂交亲和性

以７９个改良小麦品种（系）与黑麦进行杂交，研究普通小麦品种与黑麦杂交亲和性的差异及其亲和性在品种更新，更换过程中的演变趋势，结果表明：供试改良小麦品种与黑麦的杂交亲和性显著低于对照中国春；结实率大于５０％的品种３个，占供试品种的３．８％，结实率介于３０％￣５０％之间的品种４个，占５．１％，结实率介于１０％￣３０％之间的品种８个（１０．１％），结实率小于５％的品种５０个，占６３．３％，另外，结实率介

CROSSABILITY BETWEEN WHEAT AND RYE DURING THE ARTIFICIAL EVOLUTION OF WHEAT CULTIVARS

Seventy nine improved wheat cultivars (lines) including some related parents were corssed with rye to detect the difference of crossability among wheat genotypes and the developing tendency of crossability during the cultivar renewing period in Shandong Province,the results expressed that crossability of improved cultivars with rye were significantly lower than that of the check (Chinese Spring),and there were 3 cultivars with a seedset of more than 50%,4 cultivars with the seed set of 30%-50%,8 ones with that of 10%-30%,50 ones with the seed set of less than 5%,and the other 14 cultivars with the seed set of 5%-10%;The mean crossability between wheat and rye decreased with the renewing of cultivars in Shandong,and the number of cultivars with the seed set of more than 50% and 30%-50% also decreased,but that with the seed set of less than 5% increased gradually during the renewing period;Pedigree analysis revealed that the crossable gene of the tested cultivars might come from 3 landraces (Youzimai,Mazhamai and Huixianhong),Laizhou 953,8641012,Yannong 15 et al were improved wheat cultivars with both excellent agronomic traits and high crossability with rye.