Inheritance of limited-transpiration trait in peanut: an update
Inheritance of limited-transpiration trait in peanut: an update
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DOI：
10.1080/15427528.2017.1420000
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发表时间：
2018-01
影响因子：
1.3
通讯作者：
T. Sinclair;D. Pradhan;A. Shekoofa
中科院分区：
文献类型：
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作者：
T. Sinclair;D. Pradhan;A. Shekoofa
花生(Arachim Hypogeae L.)通常生长在沙质土壤和间歇性降雨的环境中，这两者都会导致土壤水分不足。在水汽压差(VPD)升高的情况下进行有限蒸腾(LT)可以保持水分，从而在生殖发育的季节晚些时候保持持续的生理活动。本研究的目的是扩大Tifrunner(LT性状未表达)×NC 3033(LT性状表达)交配的LT性状表现型的后代系的数量，以便对遗传进行初步的检测。在24个表型株系中有一半表达LT，其VPD阈值在2.16~3.38kPa之间。在表达LT的12个基因型中，有6个的阈值在2.65kpa或更低，这可能是大多数花生环境中可能相关的范围。这些结果表明了上位性遗传，支持LT在后代系中以合理的频率表达，以便在缺水条件下的品种发育中得到相应的利用。
ABSTRACT Peanut (Arachis Hypogeae L.) is commonly grown on sandy soil and in environments with intermittent rainfall, both of which can lead to soil water-deficit. Limited transpiration (LT) under elevated vapor pressure deficit (VPD) can result in water conservation, allowing sustained physiological activity later in the season during reproductive development. The objective of this study was to expand the number of progeny lines phenotyped for expression of the LT trait from the mating of Tifrunner (LT trait not expressed) × NC 3033 (LT trait expressed) to allow a preliminary examination of inheritance. Half of the 24 phenotyped lines expressed LT with their VPD threshold ranging from 2.16 to 3.38 kPa. Six of the 12 genotypes expressing LT had a threshold at 2.65 kPa or less, which is the range likely to be relevant in most peanut environments. These results, indicating epistatic inheritance, are supportive of LT expression in progeny lines at a reasonable frequency for relevant use in cultivar development for water-deficit conditions.