CAJ | 학술논문

定位棉花种子性状的基因对揭示棉花种子性状的遗传规律,以及明确棉花种子、产量、纤维品质等性状间的遗传关系具有重要意义.以(渝棉1号×T586)F_(2:7)重组近交系群体构建的遗传连锁图谱,在鉴定270个家系3个环境种子物理性状的基础上,利用MQM作图方法,共检测到34个种子物理性状QTL,包括9个种子重(qSW)、5个短绒重(qFW)、3个短绒率(qFP)、8个种仁重(qKW)、6个种子壳重(qHW)和3个种仁率(qKP)QTL,它们可解释4.6%～80.1%的性状表型变异.9个QTL在2个或3个环境中被检测到,其中包括第12染色体显性光子位点的短绒重与短绒率QTL,以及另外7个微效应QTL.34个QTL分布于15条染色体,其中A染色体组20个,D染色体组14个.有12个染色体区段分布有2个或2个以上的QTL,而且同一染色体区域同一亲本所具有的不同性状QTL的方向大多数与性状表型相关系数的正负一致.
정위면화충자성상적기인대게시면화충자성상적유전규률,이급명학면화충자、산량、섬유품질등성상간적유전관계구유중요의의.이(투면1호×T586)F_(2:7)중조근교계군체구건적유전련쇄도보,재감정270개가계3개배경충자물이성상적기출상,이용MQM작도방법,공검측도34개충자물이성상QTL,포괄9개충자중(qSW)、5개단융중(qFW)、3개단융솔(qFP)、8개충인중(qKW)、6개충자각중(qHW)화3개충인솔(qKP)QTL,타문가해석4.6%～80.1%적성상표형변이.9개QTL재2개혹3개배경중피검측도,기중포괄제12염색체현성광자위점적단융중여단융솔QTL,이급령외7개미효응QTL.34개QTL분포우15조염색체,기중A염색체조20개,D염색체조14개.유12개염색체구단분포유2개혹2개이상적QTL,이차동일염색체구역동일친본소구유적불동성상QTL적방향대다수여성상표형상관계수적정부일치.
Cotton is a leading natural fiber crop in the world, and also provides important plant oil and protein. Cotton fiber is developed from a single cell of seed epidermis, so QTL mapping of seed traits is important to reveal the genetic characteristics of seed traits and to understand the genetic relationship among seed, yield and fiber quality traits. Six seed physical traits of upland cotton recombinant inbred line population identified in three environments presented continuous segregation, and the significant variances existed in the six physical waits were affected by environments. The linkage map constructed from the upland cotton recombinant inbred line population (T586 × Yumian 1) F_(2:7) were used to map QTLs for six seed physical traits by MQM method, and 34 QTLs were detected, including nine QTLs for seed weight (qSW), five QTLs for fuzz weight (qFW), three QTLs for fuzz percentage (qFP), eight QTLs for kernel weight (qKW), six QTLs for seed hull weight (qHW), and three QTLs for seed kernel percentage (qKP), with explained phenotypic trait variance ranging from 4.6% to 80.1%. Out of 34 QTLs, nine QTLs were identified in two or three environments, and they included two large-effect QTLs controlling fuzz weight and fuzz percentage at N_1 locus on chromosome 12, and other seven small-effect QTLs. A total of 34 QTLs were mapped on 15 chromosomes, and among them 20 QTLs distributed on A sub-genome and 14 QTLs distributed on D sub-genome. Twelve chromosome regions have two or more QTLs for seed physical traits in each region, and directions of most QTLs for different seed physical waits, which originated from the same parent in the same chromosome region, were consistent with the correlation coefficients of traits.