V. SIMPULAN UMUM
M. laurina dan kerabat dekatnya dapat dibedakan menjadi empat jenis yaitu M. indica, M. laurina, M. lalijiwa, dan M. aplanata, sedangkan M. rubropetala menjadi sinonim M. indica. Analisis hubungan kekerabatan menghasilkan dua sister grup yaitu M. indica dan M. lalijiwa. serta M. laurina dan M. aplanata. Penanda E-RAPD dapat membedakan M. aplanata (Depeh) terhadap kerabat dekat lainnya. M. laurina ‘Dodol Ternate’, M. rubropetala (sinonim M. indica), M.laurina ‘Betoel’, M. indica ‘Golek’, dan M. indica ‘Cengkir’.
Penelusuran nenek moyang M. laurina dan kerabatnya menggunakan cpDNA trnL-F intergenic spacer diperoleh mangga Hiku sebagai kerabat liar dan diduga sebagai tetua bersama M. laurina dan kerabatnya. Ditemukannya kerabat liar memperkuat dugaan bahwa Indonesia merupakan pusat keanekaragaman mangga terutama yang bersifat poliembrioni.
Pengelompokan kultivar mangga berdasarkan 92 ciri morfologi dan penanda RAPD berbeda dengan pengelompokan yang selama dikenali oleh masyarakat mangga Indonesia. Keanekaragaman genetik mangga Indonesia tergolong luas yaitu 15-62% (morfologi), 2-31% (RAPD), dan 12-40% (kombinasi kedua penanda). Berdasarkan pengelompokkan kultivar mangga asal KP Cukurgondang-Pasuruan Jawa Timur tidak didapatkan duplikasi aksesi, sehingga semua aksesi perlu dikonservasi untuk kelestariannya.
Pengelompokan berdasarkan ciri agronomi ciri buah terhadap 84 kultivar mangga menghasilkan 8 kelompok utama (yaitu Berem, Golek, Kepodang, Bapang, Arumanis, Gedong, Madu, dan Kebo), tujuh belas kelompok kultivar dan 84 kultivar. Sinonim, kultivar ‘Lalijiwo’ sama dengan ‘Thaber’, ‘Tabar’, ‘Gurih’ dan ‘Arumanis’ sama dengan Gadung. Homonim yang dijumpai adalah pada ‘Kates277’ adalah anggota kelompok utama Golek, sedangkan kultivar ‘Kates’ adalah anggota kelompok utama Arumanis. Kultivar ‘Nanas93’ anggota kelompok utama Madu berbeda dengan ‘Nanas71’ anggota kelompok utama Bapang
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