CAJ | 학술논문

以陆地棉(Gossypium hirsutum L.)中棉所8号和海岛棉(Gossypium barbadense L.)Pima 90-53组配衍生的214个单株的F2群体为材料,构建了包含110个SSR标记和65个AFLP标记的遗传连锁图谱.该图谱共包括42个连锁群,连锁群长度为4.5～147.3 cM,包括2～22个分子标记,标记间平均距离为11.6 cM,总长为2 030 cM,约占棉花全基因组的40.6%.应用复合区间作图法分析该组合的F2单株和F2:3家系纤维品质性状,共得到25个纤维品质数量性状基因座(QTL),其中5个与纤维长度相关,分布在Chr.21、Chr.15、LG2和LG12上,可解释表型变异的10.2%～35.8%;4个与整齐度相关,分布在Chr.21、LG9、LG18和LG12上,可解释表型变异的12.6%～36.6%;7个与马克隆值相关,分布在Chr.9、LG1、LG9、LG20和LG12上,可解释表型变异的11.5%～26.1%;7个与断裂比强度相关,分布在Cbx.21、Chr12、Chr.8、LG1、LG4和LG10上,可解释表型变异的16.5%～52.8%;2个与伸长率相关,分布在Chr.9和Chr.21上,可解释表型变异的18.1%和27.1%.LG9、LG12和Chr.21上存在QTL聚集区.
이륙지면(Gossypium hirsutum L.)중면소8호화해도면(Gossypium barbadense L.)Pima 90-53조배연생적214개단주적F2군체위재료,구건료포함110개SSR표기화65개AFLP표기적유전련쇄도보.해도보공포괄42개련쇄군,련쇄군장도위4.5～147.3 cM,포괄2～22개분자표기,표기간평균거리위11.6 cM,총장위2 030 cM,약점면화전기인조적40.6%.응용복합구간작도법분석해조합적F2단주화F2:3가계섬유품질성상,공득도25개섬유품질수량성상기인좌(QTL),기중5개여섬유장도상관,분포재Chr.21、Chr.15、LG2화LG12상,가해석표형변이적10.2%～35.8%;4개여정제도상관,분포재Chr.21、LG9、LG18화LG12상,가해석표형변이적12.6%～36.6%;7개여마극륭치상관,분포재Chr.9、LG1、LG9、LG20화LG12상,가해석표형변이적11.5%～26.1%;7개여단렬비강도상관,분포재Cbx.21、Chr12、Chr.8、LG1、LG4화LG10상,가해석표형변이적16.5%～52.8%;2개여신장솔상관,분포재Chr.9화Chr.21상,가해석표형변이적18.1%화27.1%.LG9、LG12화Chr.21상존재QTL취집구.
Cotton is a leading textile fiber crop in the world and a source of secondary products such as oil, live- stock feed (cotton seed cake) and cellulose. The improvement of cotton fiber quality is becoming extremely important with the innovation of spinning technology. A genetic map is necessary not only for the reliable detection, mapping and estimation of gene effects of important agronomic traits, but also for further research on the structure, organization, evolution and function of cotton genome, hi the present study, simple sequence repeats (SSRs) and amplified fragment length polymorphism (AFLP) were used to assay an F_2 population from a cross between CRI8 (Gossypium hirsutum L.) and Pima 90-53 (Gossypium barbadense L.). Two hundred and fourteen F_2 plants were used for map construction using 110 SSRs and 65 AFLPs. This map included 175 markers distributing on 42 linkage groups, covering 2 030 cM, accounting for 40.6% of the cotton genome, and with an average distance of 11.6 cM between two markers. The length of linkage groups ranged from 4.5 to 147.3 cM and the markers on the groups ranged from 2 to 22. The linkage map was located on 10 chromosomes, which were Chr.4, Chr.8, Chr.9, Chr.10, Chr.12, Chr.14, Chr.15, Chr.18, Chr.21, and Chr.25. Based on composite interval mapping, five QTLs were identified for fiber length, distributing on Chr.21, Chr.15, LG2, and LG12, explaining 10.2-35.8% of the fiber length variance. Four QTLs were identified for length uniformity, distributing on Chr.21, LG9, LG18, and LG12, explaining 12.6-36.6% of the fiber length uniformity variance. Seven QTLs were identified for micronaire, distributing on Chr.9, LG1, LG9, LG20, and LG12, explaining 11.5-26.1% of the fiber micronaire variance. Seven QTLs were identified for strength, distributing on Chr.21, Chr.12, Chr.8, LG1, LG4, and LG10, explaining 16.5-52.8% of the fiber strength variance. Two QTLs were identified for fiber elongation, distributing on Chr.9 and Chr.21, explaining 18.1% and 27.1% of the fiber elongation variance. Assembled section of QTLs existed in LG9, LG12, and Chr.21. The present map and QTL analysis may provide a useful tool for breeders to transfer desirable traits from G. Barbadense to the mainly cultivated species, G hirsutum.