Spatial Proximity of ‘Ataulfo’ to ‘Haden’ Cultivar Increases Mango Yield and Decreases Incidence of Nubbins

Abstract

Mexico is the leading exporter of mangos worldwide, and ‘Ataulfo’ is one of the most popular cultivars. However, their production has dramatically dropped in recent years due to the high incidence of nubbins. One of the possible causes is the presence of a delayed self-incompatibility found in this cultivar; thus, proximity to compatible cultivars may help to reduce this incidence. Nevertheless, there is a lack of studies that have rigorously tested this hypothesis in this cultivar. For two consecutive years, the present study evaluated the incidence of nubbins, as well as the quality and quantity of commercial fruits of ‘Ataulfo’ trees located at 10, 30, and 50 m away from ‘Haden’ cultivar. Additionally, the yield and economic income of different planting designs were estimated. During both sampling periods, our results clearly indicated that at 10 m away from ‘Haden’ individuals, ‘Ataulfo’ trees presented a lower incidence of nubbins and higher production of commercial fruits, and higher yield and total income per hectare than at 30 or 50 m away from them. These results indicate that planting designs of ‘Ataulfo’ trees located 10 m away from ‘Haden’ will help to satisfy the increasing demand for mangos of this cultivar in the international market.

MassARRAY and SABER Analyses of SNPs in Embryo DNA Reveal the Abscission of Self-Fertilised Progeny during Fruit Development of Macadamia (Macadamia integrifolia Maiden & Betche)

“…However, these wide-block orchard designs can reduce the opportunities for the production of cross-fertilised fruit, as pollen needs to be transported across many orchard rows from one cultivar to another cultivar to effect cross-pollination [ 14 , 48 , 63 , 85 , 86 , 87 ]. This can lead to reduced financial value if it causes significant proportions of the crop to be produced by self-pollination or by cross-pollen sources that do not provide optimal product quality [ 14 , 51 , 53 , 88 , 89 , 90 ]. Therefore, the strong xenic effects on macadamia nut quality and product value highlight that the strategic selection and placement of cultivars as both nut producers and cross-pollinisers could provide growers and processors with higher economic returns.…”

Outcrossing Rate and Fruit Yield of Hass Avocado Trees Decline at Increasing Distance from a Polliniser Cultivar

“…The wide separation of trees of the different cultivars can reduce the opportunities for cross-pollen deposition, especially in the middle of single-cultivar blocks [13,18,19,28]. This can result in high proportions of self-fertilised fruit [18,19,[28][29][30] and reduced yield or quality [26,[31][32][33][34][35].…”