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首页> 外文期刊>Crop Research >Genetic improvement of fibre strength in diploid cotton (G. herbaceum L.) through interspecific hybridization using G. anomalum wild species.
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Genetic improvement of fibre strength in diploid cotton (G. herbaceum L.) through interspecific hybridization using G. anomalum wild species.

机译：通过使用异常羊草野生种进行种间杂交，遗传改良二倍体棉（羊草）的纤维强度。

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摘要

The inherent breaking strength of individual fibers is considered to be the most important factor in determining the strength of yarn spun from the cotton fibers. The mismatch between required fiber qualities and available fiber properties in commercial varieties and hybrids impels research to improve fiber properties of Indian germplasm. Diploid cotton, G. herbaceum is having wide adaptability and high degree of resistance to biotic and abiotic stresses. Development of diploid cotton suitable for 40 count yarn will make them more remunerative to diploid cotton growers. We started genetic introgression studies through inter-specific cross using G. anomalum to improve fiber strength of G. herbaceum cotton. Pedigree selection from F2 to F11 was practised. These F11 lines were evaluated at ARS, Dharwad Farm, during 2009-10 in augmented design-II. Observations on fiber traits, seed cotton yield and ginning turnout were recorded and analysed using Windostat version 8.5. Seed cotton yield ranged from 75-2557 kg/ha with 832.99% GCV, 80% heritability and 67.93% genetic advance as per cent of mean. Range for ginning outturn was 28.22-39.77% with 65% heritability, 24.59% GCV and 16.98% genetic advance as per cent of mean. Recorded fibre strength was in the range of 16.35-24.65 g/tex with variability parameters like 2.58% GCV, 93% heritability and 1.35% genetic advance as per cent of mean. The value for 2.5% span length ranged from 21.97 to 30.92 mm with 18.19% GCV, 73% heritability and 11.51% genetic advance as per cent of mean. Recorded micronaire value ranged from 3.29 to 6.64 micro g/in with GCV of 14.38%, heritability of 74% and genetic advance as per cent of mean of 22.37%. The seven selections PSCANOI-5, 42, 62, 160, 166, 170 and 173 recorded significantly higher in both fibre strength (18.05-21.85 g/tex) and seed cotton yield (1680.49-1896.69 kg/ha) than diploid cotton commercial variety DLSa-17 (Seed cotton yield 1236.97 kg/ha, GOT 36.42%, 2.5% span length 26.47 mm, fibre strength 18.0-19.5 g/tex and micronaire 5.03 micro g/in). These selections recorded 36 to 53% yield increase over DLSa-17. It indicates the possibility of improvement in both seed cotton yield and fibre quality traits of G. herbaceum cotton through interspecific hybridization using wild species G. anomalum as a donor parent.
机译：单个纤维固有的断裂强度被认为是确定由棉纤维纺制的纱线强度的最重要因素。商业品种和杂种中所需纤维品质与可用纤维特性之间的不匹配，促使人们进行研究以改善印度种质的纤维特性。二倍体棉花，G。草科植物具有广泛的适应性和对生物和非生物胁迫的高度抗性。开发适用于40支纱线的二倍体棉将使它们对二倍体棉种植者更具收益。我们通过使用G. anomalum的种间杂交来提高G. Herbaceum棉的纤维强度，开始了基因渗入研究。进行了从F 2 到F 11 的谱系选择。这些F 11 品系在2009-10年度在DRS的DRS中进行了扩增设计II评估。使用Windostat版本8.5记录并分析纤维性状，籽棉产量和轧花率。籽棉产量为75-2557 kg / ha，GCV为832.99％，遗传力为80％，遗传进步率为67.93％，占平均值的百分比。杜松子酒产量的范围为28.22-39.77％，遗传力为65％，GCV为24.59％，遗传进步率为16.98％，占平均值的百分比。记录的纤维强度在16.35-24.65 g / tex的范围内，其变异性参数为2.58％GCV，93％遗传力和1.35％遗传进步，占平均值的百分比。 2.5％跨度的值范围从21.97到30.92 mm，GCV为18.19％，遗传力为73％，遗传进步的平均值为11.51％。记录的马克隆值在3.29至6.64微克/英寸之间，GCV为14.38％，遗传力为74％，遗传进步为平均值的22.37％。七个选择品种PSCANOI-5、42、62、160、166、170和173的纤维强度（18.05-21.85 g / tex）和籽棉产量（1680.49-1896.69 kg / ha）均显着高于二倍体棉商品品种DLSa-17（种子棉产量1236.97千克/公顷，GOT 36.42％，跨度长度2.5％的长度为26.47毫米，纤维强度18.0-19.5克/特，马克隆值5.03微克/英寸）。这些选择记录的产量比DLSa-17高出36％至53％。这表明通过使用野生种异常羊草作为供体亲本进行种间杂交，可以提高种草的种子棉产量和纤维品质性状。

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