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首页> 外文期刊>Turkish Journal of Agriculture & Forestry >Analysis of variability, heritability, and genetic advance in seed yield and related traits of orchardgrass (Dactylis glomerata L.) populations
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Analysis of variability, heritability, and genetic advance in seed yield and related traits of orchardgrass (Dactylis glomerata L.) populations

机译：果园（Dactylis glomerata L.）种群种子产量及相关性状的变异性，遗传性和遗传进展分析

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Orchardgrass (Dactylis glomerata L.) genotypes from different natural sources in the Eastern Anatolian Region of Turkey were clonally evaluated to study genetic variation and the relationships between seed yield and its components using a randomized complete block design. Results showed very significant genotypic variances among genotypes for all traits, including agronomic (seed, dry matter, and biological yields), morphological (plant height; panicle length; crown diameter; numbers of fertile, sterile, and total stems; and stem intensity), physiological (percent fertile stems, harvest and fertility indexes), and phenological (heading and anthesis dates) traits, as well as genotype x year interaction variances. Genotypic components were the main contributor to phenotypic variation of all traits (except physiologic traits, stem intensity, and number of sterile stems), resulting in high broad-sense heritability (〉50%). Agromorphological and physiological traits had greater phenotypic (PCV), genotypic (GCV), and environmental coefficients of variation, while these were lower for phenological traits. After the phenological traits, plant height, crown diameter, and panicle length were the least variable traits, while stem intensity and fertility index were highly variable. Heritability estimates increased as GCV values approached PCV values. Expected genetic gain greatly increased as heritability estimates and PCV both increased, rather than heritability values alone. The first 5 principle components accounted for 84.90% of total variance. All agromorphological traits (except number of sterile stems) and fertile stem percentage were primary sources of variation of the PC1Jxis, while harvest and fertility indexes were for PC2. Out of the 4 clusters,genotypes in cluster 4 of higher seed yield were faster in abov地round biomass accumulation. They also had the best agromorphological traits coupled with early maturity. Seed yield greatly increased as aerial biomass increased without any change in harvest index, but there was a significant decrease in fertility index. It was concluded that selection for dry matter yield could result in a simultaneous increase in seed yield.
机译：对土耳其安那托利亚东部地区不同自然来源的果园（Dactylis glomerata L.）基因型进行了克隆评估，以使用随机完整区组设计研究遗传变异以及种子产量与其组成之间的关系。结果显示，所有性状的基因型之间的基因型差异非常显着，包括农艺性状（种子，干物质和生物学产量），形态学（植物高度;穗长;冠径;可育，不育和总茎数;茎粗） ，生理性状（可育茎的百分比，收获和生育力指数）和物候性（抽穗期和开花期）性状，以及基因型x年间的相互作用方差。基因型成分是导致所有性状（生理性状，茎秆强度和不育茎秆数量除外）的表型变异的主要因素，导致广泛的遗传力（> 50％）。农业形态和生理性状具有较高的表型（PCV），基因型（GCV）和环境变异系数，而对于物候性状则较低。在物候性状之后，株高，冠径和穗长是变化最小的性状，而茎秆强度和育性指数则变化很大。随着GCV值接近PCV值，遗传估计值增加。随着遗传力估计值和PCV的增加，预期的遗传增益大大增加，而不是仅遗传率值增加。前5个主要成分占总方差的84.90％。所有农艺性状（不育茎数除外）和可育茎百分比是PC1Jxis变异的主要来源，而收获和生育指数则是PC2。在4个簇中，种子4个簇中种子产量较高的基因型在周围生物量积累方面较快。它们还具有最佳的农业形态学特征以及早熟。种子产量随空中生物量的增加而大大增加，而收获指数没有任何变化，但肥力指数却显着下降。结论是选择干物质产量可能会导致种子产量同时增加。

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