Minimum Number of Genes Controlling Cotton Fiber Strength in a Backcross Population
Minimum Number of Genes Controlling Cotton Fiber Strength in a Backcross Population
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DOI：
10.2135/cropsci2003.0425
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发表时间：
2005-05
期刊：
影响因子：
2.3
通讯作者：
W. Meredith
中科院分区：
文献类型：
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作者：
W. Meredith
美国的纺织米尔斯厂需要结实的棉纤维（Gossypium hirsutum L.）用于现代高速纺织作业。本研究的主要目的是确定从FTA 263-20（FTA）下降的强度遗传。FTA是通过基因渐渗到G. hirsutum从G. arboreum L.，G. thurberii Todaro和G.巴巴多斯湖将5个回交（BC）到“Deltapine 16”（DP 16）中，随后将6个BC到DP 90 ne中。2001年，对3套64个BC 6 F2：F3后代进行了强度鉴定. F2：F3比强度（F = 2.79）、产量、3个产量构成因素和其它4个纤维性状的变异均达到极显著水平。从三个重复测试，强度基因数估计值范围为1.10至1.29，组合的集合为1.23个基因。BC 5亲本的平均强力比DP 90 ne高10.3%，产量低16.9%，强力与衣分、铃重、籽重和2.5%跨距高度相关。这些相关性状的基因数范围从0.02马克隆值到1.04产量。一个单独的研究涉及BC 5的父母，'Deltapine 90'（DP 90）和DP 90 ne被用来确定强度的主要物理成分。细度和单纤维强度没有影响。短纤维含量显著影响强度，因为三个BC 5亲本的平均短纤维为6.7，而DP 90 s的平均短纤维为8.7%。亲本BC的平均强度比DP 90 ne高11%，分别为240和219 kN·m·kg-1，产量比DP 90 ne低9.0%。可能是单个主基因或紧密连锁的基因簇导致纤维强度的增加。
Textile mills in the USA require strong cotton fiber (Gossypium hirsutum L.) for modern high-speed textile operations. The primary objective of this study was to determine the inheritance of strength descending from FTA 263-20 (FTA). FTA was developed by introgression into G. hirsutum from G. arboreum L., G. thurberii Todaro, and G. barbadense L. Five backcrosses (BCs) into 'Deltapine 16' (DP 16) followed by six BCs into DP 90ne were made. In 2001, three sets of 64 BC 6 F 2 :F 3 progenies were evaluated for strength. Significant variability for F 2 :F 3 strength (F = 2.79), yield, three yield components, and four other fiber traits were detected. From a three replication test, strength gene number(s) estimates ranged from 1.10 to 1.29 and combined over sets was 1.23 genes. Average strength for the three BC 5 parents was 10.3% greater than DP 90ne and yield was 16.9% less. Strength was highly correlated with lint percentage, boll weight, seed weight, and 2.5% span length. Gene numbers for these correlated traits ranged from 0.02 for micronaire to 1.04 for yield. A separate study involving the BC 5 parents, 'Deltapine 90' (DP 90) and DP 90ne was used to determine the major physical components of strength. Fineness and individual fiber strength had no effect. Short fiber content significantly impacted strength as the three BC 5 parents average short fiber was 6.7 versus 8.7% for the DP 90s. The BC, parents average strength was 11% higher, 240 vs. 219 kN m kg -1 , and its yield was 9.0% lower than DP 90ne. Probably a single major gene or closely linked cluster of genes resulted in increased fiber strength.