Very Early Biomarkers Screening for Water Deficit Tolerance in Commercial Eucalyptus Clones

被引:8
|
作者
Correa, Thais R. [1 ]
Picoli, Edgard Augusto de T. [2 ]
Pereira, Washington Luiz [2 ]
Conde, Samyra A. [3 ]
Resende, Rafael T. [4 ,5 ]
de Resende, Marcos Deon V. [6 ,7 ]
da Costa, Weverton Gomes [8 ]
Cruz, Cosme Damiao [8 ]
Zauza, Edival Angelo V. [9 ]
机构
[1] Univ Estadual Maranhao, Dept Fitotecnia & Fitossanidade, BR-65055310 Sao Luis, MA, Brazil
[2] Univ Fed Vicosa, Dept Biol Vegetal, BR-36570900 Vicosa, MG, Brazil
[3] Univ Fed Vicosa, Dept Agron, BR-36570900 Vicosa, MG, Brazil
[4] Univ Fed Goias, Escola Agron EA, BR-74690900 Goiania, GO, Brazil
[5] Univ Brasilia UnB, Dept Engn Florestal, BR-70910900 Brasilia, DF, Brazil
[6] Univ Fed Vicosa, Dept Engn Florestal, BR-36570900 Vicosa, MG, Brazil
[7] EMBRAPA Cafe, BR-70770901 Brasilia, DF, Brazil
[8] Univ Fed Vicosa, Dept Biol Geral, BR-36570900 Vicosa, MG, Brazil
[9] Suzano SA, BR-41810012 Salvador, BA, Brazil
来源
AGRONOMY-BASEL | 2023年 / 13卷 / 03期
关键词
drought; eucalypt breeding; phenomics; early selection; DROUGHT STRESS; EARLY SELECTION; PHOTORESPIRATION; GRANDIS; PHOTOSYNTHESIS; EFFICIENCY; POTASSIUM; RESPONSES; NITROGEN; GROWTH;
D O I
10.3390/agronomy13030937
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
The identification of genotypes more tolerant to water deficit is a challenge to breeding programs. In this research, our objectives were to identify and validate traits for tolerance to water deficit in eucalypts. The estimation of genotypic parameters and early selection are proposed based on mixed models, selection indexes and validation schemes. Seedlings with 110 days were grown in a greenhouse for 12 weeks, and two water deficit treatments were conducted (polyethylene glycol and water limitation). A total of 26 biomarkers were evaluated, and 15 of them were significant, exhibited adequate heritability, and used for screening: final plant height, increment in height, increment in diameter, area of mature and fully expanded leaf, nutrient contents of N, K, Ca, Mg, S, Cu, Zn, Mn and B, photosynthesis (A) and stomatal conductance (gs). Both treatments were adequate to discriminate water deficit-tolerant clones. The ranking of tolerant clones according to their phenotype in the field demonstrates the potential for early selection and is consistent with the maintenance of water-deficit-tolerance mechanisms until adulthood. There is evidence that the choice of biomarker depends on the species involved and different strategies contributing to the tolerance trait.
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页数:20
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