泸定百合居群染色体形态研究

研究了７个泸这百合居群的染色体形态变异，结果如下：（１）南涧居群Ｋ１＝２ｎ＝２ｘ＝２４＝２ｍ（２ＳＡＴ）＋２ｍ＋４ｓｔ（２ＳＡＴ）＋４ｓｔ＋１２ｔ，染色体长度比２．６２，平均臂比８．６３，Ａｓ，Ｋ值８１．２０％。（２）弥勒居群Ｋ２＝２ｎ＝２ｘ＝２４＝２ｍ（２ＳＡＴ）＋２ｍ（２ＳＡＴ）＋２ｓｔ（２ＳＡＴ）＋２ｓｔ＋１４ｔ，染色体长度比２．５７，平均臂比８．６９，Ａｓ．Ｋ．值８１．１２％。（３）峨眉居

Study on Chromosomal Morphology in Populations of Lilium sargenttiae Wilson

The chromosomal morphology was analysised in seven populations (P 1,P 2,P 3,P 4,P 5,P 6,P 7) of Lilium sargenttiae Wilson.The karyotypical formulas and characters of seven populations are given as follows,i.e.,K 1=2n=2x=24=2m(2SAT) 2m 4st(2SAT) 4st 12t,the means of ratio (largest/small est),mean ratio of arm and As.K.(index of asymmetrical karyotype) in the Nanjian population (P 1) are 2.62,8.63 and 81.20%,respectively;K 2=2n=2x=24=2m(2SAT) 2m(2SAT) 2st(2SAT) 2st(2SAT) 2st 14t, the means of ratio,mean ratio of arm and As. K. in the Mile population (P 2) are 2.57,8.69 and 81.12%,respectively;K 3=2n=2x=24=2m(2SAT) 2m 2st(2SAT) 6st 12t,the means of ratio,mean ratio of arm and As.K.in the Emei population (P 3) are 2.39,7.84 and 80.62%,respectively;K 4=2n=2x=24=2m(2SAT) 2m 6st 14t,the means of ratio,mean ratio of arm and As.K.in the Lunan population (P 4) are 2.39,7.31 and 80.49%,respectively;K 5=2n=2x=24=2m(2SAT) 2m 2st(4SAT) 2st(2SAT) 4st 2t(2SAT) 10,the means of ratio,mean ratio of arm and As.K. in the Chengjiang population (P 5) are 2.28, 7.66 and 80.59%,respectively;K 6=2n=2x=24=2m(2SAT) 2m 2st(4SAT) 2st(2SAT) 2st(2SAT) 14t,the means of ratio,mean ratio of arm and As.K.in the Wenshan population (P 6) are 2.39,7.31,and 80.49%,respectively;K 7=2n=2x=24=2m(2SAT) 2m(2SAT) 2st(4SAT) 2st(2SAT) 2st(2SAT) 2st 12t,the means of ratio,mean ratio of arm and As.K.in the Simao population (P 7) are 2.52,8.09 and 81.03%,respectively.Above all karyotypical types belong to the Stebbins' 3B in the seven populations.The karyotypical variation of Lilium sargenttiae is the same as in Lilium .There were only a few variation in the karyotypical formulas,relative length,arm ratio,secondary constitution number and its distribution among the seven populations,as the Chromosomal aberration often occurred.