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为了明确拉塞特(Russet)×黑美人彩色马铃薯杂交组合F1中选出的5个无性株系的细胞遗传学特性,采用常规制片技术对其花粉育性及花粉母细胞减数分裂中期I(PMCMⅠ)染色体配对构型进行了分析。育性较高的株系其二价体和四价体出现的频率较高,单价体和三价体出现的频率较低。株系19、株系27和株系31的花粉可育率均高于50%,适宜在彩色马铃薯新品系的进一步杂交选育中作父本中间材料利用;而株系13和株系29的花粉可育率远低于50%,适宜作母本中间材料利用。彩色马铃薯杂种F1无性株系13、株系19、株系27、株系29和株系31的染色体配对构型分别为:2n=4x=48=4.67Ⅰ+6.09Ⅱ+5.25Ⅲ+3.59Ⅳ、2n=4x=48=1.88Ⅰ+12.70Ⅱ+1.30Ⅲ+4.30Ⅳ、2n=4x=48=2.66Ⅰ+9.70Ⅱ+3.07Ⅲ+4.04Ⅳ、2n=4x=48=7.50Ⅰ+4.00Ⅱ+6.84Ⅲ+2.84Ⅳ、2n=4x=48=2.33Ⅰ+15.33Ⅱ+2.67Ⅲ+1.67Ⅳ。
In order to clarify the cytogenetic characteristics of five clones selected from F1 hybrids of Russet × Black Beauty, the pollen fertility and pollen mother cell metaphase I (PMCM Ⅰ) chromosome pairing configuration was analyzed. Higher fertility lines appeared more frequently in the divalent and tetravalent forms, and monovalent and trivalent forms appeared less frequently. The pollen fertility rates of strain 19, strain 27 and strain 31 were higher than 50%, which were suitable for the use of male parent intermediate materials for further crossbreeding of new color potato lines. However, lines 13 and 29 Pollen fertility far below 50%, suitable for use as the mother material of the middle. The chromosomal pairing configurations of Chromogenic potato F1 hybrids 13, 19, 27, 29 and 31 were 2n = 4x = 48 = 4.67Ⅰ + 6.09Ⅱ + 5.25Ⅲ + 3.59Ⅳ, 2n = 4x = 48 = 1.88Ⅰ + 12.70Ⅱ + 1.30Ⅲ + 4.30Ⅳ, 2n = 4x = 48 = 2.66Ⅰ + 9.70Ⅱ + 3.07Ⅲ + 4.04Ⅳ, 2n = 4x = 48 = 7.50Ⅰ + 4.00Ⅱ + 6.84Ⅲ + 2.84IV, 2n = 4x = 48 = 2.33I + 15.33II + 2.67III + 1.67IV.