AYA and HANA: New Seedless Mandarin’s Triploid Hybrids Selected in Morocco | Chapter 05 | Advances and Trends in Biotechnology and Genetics Vol. 1
Seedlessness is a major objective in
Morocco Citrus improvement programme. Triploidy has played an important role in
the development of new seedless mandarin cultivars for fresh fruit market and
has received increasing attention for the consumers. Citrus triploid hybrids
can be recovered through 2x x 2x taking advantage of the unreduced (2n) gametes
formation. 2x x 4x and 4x x 2x sexual hybridizations are also widely exploited.
In that case, many series of diploid crosses were assessed. At maturity, the
fruits have been harvested, and small embryos were extracted from undeveloped
seed and cultured on the medium of Murashig and Skoog supplemented with 1mg/l
gibberellic acid according. Triploids seedling selected by flow cytometry
analysis were budded on Troyer citrange and planted in INRA domain with spacing
6 m X 3 m. Two new seedless selections of mandarins have been evaluated in a
citrus breeding program at Morocco INRA: Hana and Aya that were compared with
their female parent clementine Sidi Aissa. These promising seedless mandarins
were identified by easy-peeling, juicy fruits, have a pleasant taste and are
sweet like the Sidi Aissa Clementine. These clones, showing commercial
interest, were described and registered in Moroccan official catalogue.
Triploidy confirmed its importance in obtaining seedless hybrids. This study is
significant because it is the first triploids Citrus selection work in Menzeh
INRA in Morocco. We found considerable differences most of the pomological
characteristics. To make an objective comparison of fruit quality, precocity,
and yield of these selected genotypes, they all need to be grown using many
rootstocks, soils, climates, and cultural practices. Adaptation studies will
also be required for the selected mandarins triploids. Therefore, selected in
the first stage of selection should be studied in the second stage of
selection.
Author(s) Details
Handaji Najat
Institut National de la
Recherche Agronomique, B.P. 257, Kénitra, Morocco.
Benyahia Hamid
Institut National de la
Recherche Agronomique, B.P. 257, Kénitra, Morocco.
Arsalane Najat
Institut National de la
Recherche Agronomique, B.P. 257, Kénitra, Morocco.
Benaouda Hassan
Institut National de la
Recherche Agronomique, B.P. 257, Kénitra, Morocco.
View Volume: https://doi.org/10.9734/bpi/atbg/v1
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