Agronomic performance of diploid inbred potatoes and their F1 hybrid potatoes

IF 1.6 3区农林科学 Q2 AGRONOMY

Euphytica Pub Date : 2024-03-07 DOI:10.1007/s10681-024-03305-6

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Abstract

Phenotypic uniformity and tuber yield are fundamental concerns in diploid inbred-based F₁ hybrid breeding in potatoes. We evaluated the agronomic traits of 22 hybrid families grown in small and large pots and the field. These families were derived from crosses of heterozygous × heterozygous, homozygous × heterozygous, and homozygous × homozygous parents using highly homozygous plants of Solanum phureja, S. chacoense, and tenth selfed generation plants derived from an interspecific hybrid. Genetic variability was estimated using genome-wide single nucleotide polymorphism (SNP) markers. Hybrid populations from homozygous × homozygous parents exhibited the highest phenotypic and genetic uniformity levels. Hybrid vigor in hybrids of homozygous × homozygous parents was tremendously enormous for fecundity and growth (up to 2877.5% and 8153.6%, respectively) and moderately large for tuber yield (158.2 to 230.7%). SNP-based genome-wide percent heterozygosity ranged from 28.7 to 44.3% for heterozygous parents and 14.4 to 44.8% for hybrid populations. The heterozygosity was correlated most highly with tuber size (r = 0.691–0.684) and negatively with tuber number (r = − 0.518), resulting in a positive correlation with tuber yield (r = 0.498). Since the heterozygosity of 2x Atlantic was the second highest (44.3%), its hybrid population produced a high yield in the field (925.6 g/plant) close to the yield of tetraploid potatoes. Thus, yield potential can be predicted by the genome-wide percent heterozygosity, possibly because many genetic factors collectively contributing to yield are located across the potato genome, and their accumulated heterotic effects can be represented as the genome-wide percent heterozygosity.

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二倍体近交系马铃薯及其 F1 代杂交马铃薯的农艺性能

摘要表型一致性和块茎产量是基于二倍体近交系的马铃薯 F1 代杂交育种的基本问题。我们评估了在小盆、大盆和田间种植的 22 个杂交系的农艺性状。这些品系是由杂合×杂合、同种×杂合和同种×同种亲本杂交产生的，使用的是高度同种的 Solanum phureja、S. chacoense 植株和来自一个种间杂交种的第十代自交植株。利用全基因组单核苷酸多态性（SNP）标记估计了遗传变异性。来自同源基因×同源基因亲本的杂交群体表现出最高的表型和遗传一致性水平。同源杂合×同源杂合亲本杂交种的繁殖力和生长活力非常高（分别高达 2877.5%和 8153.6%），块茎产量的繁殖力和生长活力中等（158.2%至 230.7%）。基于 SNP 的全基因组杂合度百分比，杂合亲本为 28.7% 至 44.3%，杂交群体为 14.4% 至 44.8%。杂合度与块茎大小高度相关（r = 0.691-0.684），与块茎数量负相关（r = - 0.518），与块茎产量呈正相关（r = 0.498）。由于大西洋 2x 的杂合度位居第二（44.3%），其杂交群体在田间的产量很高（925.6 克/株），接近四倍体马铃薯的产量。因此，产量潜力可以通过全基因组杂合度百分比来预测，这可能是因为对产量有共同贡献的许多遗传因子分布在整个马铃薯基因组中，它们累积的杂合效应可以用全基因组杂合度百分比来表示。

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来源期刊

Euphytica 农林科学-农艺学

CiteScore

3.80

自引率

5.30%

发文量

157

审稿时长

4.5 months

期刊介绍： Euphytica is an international journal on theoretical and applied aspects of plant breeding. It publishes critical reviews and papers on the results of original research related to plant breeding. The integration of modern and traditional plant breeding is a growing field of research using transgenic crop plants and/or marker assisted breeding in combination with traditional breeding tools. The content should cover the interests of researchers directly or indirectly involved in plant breeding, at universities, breeding institutes, seed industries, plant biotech companies and industries using plant raw materials, and promote stability, adaptability and sustainability in agriculture and agro-industries.