Identification of Polymorphism on Simple Sequence Repeats Markers Associated With Brown Planthopper Resistance Genes in Twenty Rice Genotypes and Their Genetic Relationship

Abstract

<p>Brown planthopper is one of the most destructive insect pest of rice in Indonesia and other Asian countries. Pyramiding some brown planthopper resistance genes is a valuable approach to create more durable resistance against the pest. The objective of this study was to identify polymorphisms of Brown Planthopper Resistance genes (Bph) on 20 genotypes of rice, and to obtain genetic relationship among genotypes tested. The experiment was conducted from June to September 2012 at Green House and Laboratory of Plant Analysis and Biotechnology, Faculty of Agriculture, Universitas Padjadjaran, Jatinangor. Twenty genotypes were analyzed, and two of them were used as check varieties. Simple Sequence Repeat (SSR) markers were applied to detect Bph3, Bph4, Qbph3, and Qbph4 genes. Polymorphic levels were analyzed by calculating PIC (Polymorphic Information Content). The grouping of rice genotypes were done based on principal components analysis (PCA) of SSR data, and the genetic relationship based on the presence of Bph genes was estimated using UPGMA (Unweighted Pair Group With Arithmetic mean). Results showed that RM313, RM8072, RM8213, RM5953, RM586, and RM589 markers were polymorphic. Rice genotypes PTB 33, Diah Suci, Cibogo, Cisantana, Digul, Ciherang, Inpari 13, Inpari 10, and Memberamo had Bph3, Qbph3, Bph4, and Qbph4. Meanwhile Bph3, Qbph3, and Bph4 were supposed to be belonged by IR 64, Aek Sibundong, Batang Gadis, IR 66, and Mekongga. Kalimas and Tukat Penatu had Bph3, Qbph3, dan Qbph4. IR 74 had Bph3 and Qbph3, and Fatmawati had Bph3 and Bph4. UPGMA clustering resulted in two main clusters, in which the first cluster consisted of 2 subclusters. PTB-33 was closely related with Memberamo, Tukat Penatu, Digul, Diah Suci, and Kalimas. The SSR markers used in this study were proven to be valuable in molecular detection of Bph genes and in estimating genetic relationsips of rice genotypes. PTB-33 was a good donor of resistance genes, as well as Memberamo, Tukat Penatu, Digul, Diah Suci, and Kalimas which were identified as promising donors in rice breeding resistance to brown planthopper. </p><p><strong>Keywords :</strong> Bph gene, Brown Planthopper, Genetic relationship, SSR markers.</p>

Molecular screening of local Indonesian rice to identified resistant varieties against brown planthopper (Nilaparvata lugens) attacks

“…The resistance of a variety to brown planthopper comes from several secondary metabolite compounds with the contribution of each compound (Haliru et al 2020). It can also be confirmed that Aek Sibundong has a resistance gene to the brown planthopper biotype 3; this result is also supported by Carsono et al (2015), in their research results stated that the Aek Sibundong variety has a positive resistance gene detection of RM19291. Jalawara,6: Fatuk Masin,7: Bulu Putih,8: Kubiak Kusuik,9: Pontianak,10: Widnes,11: Leukat Medan,12: Jatiluhur,13: Mahakam,14: Kapuas,15: Bengawan Solo,16: MS Pendek,17: Mentik,18: Super Manggis,19: Ciliwung,20: Lamongan1,21: Gajah Mungkur,22: Cimelati,23: Cibodas,24: Shinta,25: Cisadane,26: Aek Sibundong,27: Sukamandi This research concluded that Lahoten and Fatuk Masin have the highest population of brown planthoppers (Nilaparvata lugens (Stål)) compared to other varieties (Figure 3).…”

Studi Kekerabatan Padi Hasil Piramidisasi Berbasis Marka Molekuler dan Fenotipik

“…Umumnya teknik piramidisasi yang telah dilakukan hanya berfokus pada karakter secara vertikal yaitu ketahanan terhadap beberapa patogen/hama dengan strain/biotipe (Hittalmani et al, 2000;Katiyar et al, 2001;Singh et al, 2001;Narayanan et al, 2002;Joseph et al, 2004;Kumaravadivel et al, 2006). Sementara itu, penelitian sebelumnya pada riset ini telah berhasil menggabungkan beberapa karakter unggul secara horizontal diantaranya komponen hasil tinggi (bobot bulir tinggi, jumlah malai banyak, malai panjang), umur genjah, kualitas mutu beras baik (kandungan amilosa sedang dan aromatik) serta memiliki ketahanan terhadap hama wereng coklat ke dalam satu genotip harapan yang memiliki karakter morfoagronomi yang unggul (Carsono dkk., 2012;Carsono et al, 2013;Carsono dkk., 2016;Sari dkk., 2013;Tambunan dkk., 2016). Kombinasi gen diperoleh dengan menyilangkan beberapa genotip tetua dengan karakter unggul diantaranya Sintanur, Pandan wangi, IR64, PTB33, Ciapus, KA, genotip SP87-4 (Sintanur x PTB-33), PP48-3 (Pandanwangi x PTB-33), IP158-5 (IR64 x PTB-33), dan CAKA41 (Ciapus x KA).…”