IDENTIFIED RESILIENT FLAX GENOTYPES WITH IMPROVED AGRONOMIC CHARACTERISTICS FOR PRE-BREEDING

Inga Morozova, V. Stramkale, I. Kroiča, A. Stramkalis
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Abstract

Genetic diversity evaluation in a breeding program is essential produce robust, resilient crop varieties with improved agronomic characteristics under environmental challenges in the sustainable agro-ecosystems. Knowledge and full potential on the impact of genotypes and growing conditions on flax yield traits still incomplete. The aim of this study was to evaluated the influence of hydrothermal conditions on the development of agronomic important traits of flax, analysed agronomic characteristics and identified perspective genotypes for pre-breeding. Field investigations were carried out from 2014 to 2017 for agronomically important traits of flax. In the study was evaluated flax population with Latvian origin in 24 fibre flax genotypes and ‘Vega 2’ (ST) as the standard variety of Lithuanian origin under Latvian meteorological conditions. Correlation between flax genotypes of the agronomically important yield traits and years of the hydrothermal coefficients during the growth period were analysed. According to the results obtained that most of genotypes the significant higher plants stem yield, total plant height, technical plant height, number of seed vessels per plant were measured in the growing seasons with high humidity. However, the higher seed yield and 1000 seed weight were measured in the driest year. The correlation between flax fibre content, seed number per seed-vessel, oil content and humidity level differed in dependence on genotype. The coefficient of variability between years was higher for of stem yield when compared with seed yield. The flax genotypes ‘S13/5-7/5-93’ exhibited more stable, highest stem yield (840.0 g m-2) and high seed yield (162.2 g m-2). The flax was identified 80% samples the short and 20% the medium vegetation period. 
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鉴定具有改良农艺性状的弹性亚麻基因型,用于预育种
育种计划中的遗传多样性评估对于在可持续农业生态系统的环境挑战下生产出健壮、有抗灾能力、农艺性状更好的作物品种至关重要。关于基因型和生长条件对亚麻产量性状影响的知识和潜力仍然不完全。本研究旨在评价水热条件对亚麻重要农艺性状发育的影响,分析亚麻农艺性状,确定预育种前景基因型。2014 - 2017年对亚麻的农艺重要性状进行了实地调查。本研究在拉脱维亚气象条件下,以“Vega 2”(ST)为标准品种,评价了24种来自拉脱维亚的纤维亚麻基因型群体。分析了亚麻重要农艺产量性状基因型与生育期热液系数年数的相关性。结果表明,大多数基因型在高湿生长季节的茎产量、总株高、技术株高、单株种管数显著增高。但在最干旱年份,种子产量和千粒重最高。亚麻纤维含量、每种管种子数、含油量和湿度对基因型的相关性存在差异。茎产量的年际变异系数高于种子产量。亚麻基因型S13/5-7/5-93更稳定,茎产量最高(840.0 g m-2),籽粒产量最高(162.2 g m-2)。80%的样品鉴定为短植被期,20%鉴定为中植被期。
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