日本李子(李梅。)是在全球温带地区种植的果树。其花卉生物学特性和产量受多种因素影响,与品种之间的自我和交叉(in)相容性有关的问题是整个玫瑰科的象征。这项工作的目的是阐明水果,雌蕊花粉管生长的动力学,以及产量和其他结果属性,在\'SatlujPurple\'和\'KalaAmritsari\'中,可能是印度北部地区最受欢迎的亚热带日本李子品种。具体来说,我们检查了六种不同授粉变体的反应,即自花授粉,两个品种位于相邻行的开放式授粉,开放授粉,两个品种位于遥远的行,手工异花授粉,补充授粉,和花卉花束。在两年的调查中,两个李子品种均表现出良好的离体花粉萌发(平均而言,高于50%)在不同的蔗糖浓度下,具有“SatlujPurple”和15%浓度的最高值。在体内,对花柱各个部分花粉生长的分析表明,当“SatlujPurple”的雌蕊被cv的花粉粒授粉时,表现最佳。\'KalaAmritsari\'.与开放和自花授粉相比,异花授粉还记录了雌蕊花粉管的更快生长,不相容花粉管的数量最少。从生产的角度来看,异花授粉在不同的授粉变体中显示出最明显的结果,初始坐果最高(36.6%),产量最高(28.0公斤/树),和“SatlujPurple”的果实发育较短(自花授粉的“SatlujPurple”树的坐果和产量分别为3.3%和2.0kg/树,分别)。相反,将“SatlujPurple”花粉用于“KalaAmritsari”显示效果不佳。最后,在我们的研究中,\'KalaAmritsari\'表现出自我兼容性。我们得出的结论是,“SatlujPurple”坐果不良的主要原因是自交不亲和。通过对各种授粉处理的分析揭示的相关基因型特异性效应也强调了套种对提高亚热带日本李子品种的坐果和产量的重要性。
The Japanese plum (Prunus salicina Lindl.) is a fruit tree globally cultivated in temperate regions of the world. Its floral biology and yield are affected by several factors, with issues related to self- and cross- (in) compatibility among varieties being emblematic of the whole Rosaceae family. The aim of this work was to elucidate the fruit set, dynamics of pollen tube growth in pistil, and yield and other fruiting attributes, in \'Satluj Purple\' and \'Kala Amritsari\', probably the most popular subtropical Japanese plum varieties in northern regions of India. Specifically, we examined the response of six different pollination variants, namely to self-pollination, open-pollination with the two cultivars located in adjacent rows, open-pollination with the two cultivars located in distant rows, manual cross-pollination, supplementary pollination, and floral bouquet. During the two years of the investigation, both plum cultivars showed good in vitro pollen germination (on average, above 50%) at different sucrose concentrations, with the highest values for the \'Satluj Purple\' and for the 15% concentration. In vivo, the analysis of the pollen growth in the various sections of the style indicated the best performance when pistils of \'Satluj Purple\' were pollinated by pollen grains of cv. \'Kala Amritsari\'. Cross-pollination also registered faster growth of pollen tube in pistil with the lowest number of incompatible pollen tubes compared to open- and self-pollination. From the productive point of view, cross-pollination showed the most pronounced results among the different pollination variants, with the highest initial fruit set (36.6%) and yield (28.0 kg/tree), and the shorter fruit development in \'Satluj Purple\' (fruit set and yield in self-pollinated \'Satluj Purple\' trees were 3.3% and 2.0 kg/tree, respectively). Conversely, the use of \'Satluj Purple\' pollen for \'Kala Amritsari\' showed poor results. Finally, in our study, \'Kala Amritsari\' showed self-compatibility. We conclude that the main cause of poor fruit set in \'Satluj Purple\' is self-incompatibility. The relevant genotypic-specific effects revealed by the analysis of the various pollination treatments also highlighted the importance of interplanting to increase fruit set and yield for subtropical Japanese plum varieties.