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Molecular genetic diversity of winged bean gene pool in Thailand assessed by SSR markers

Horticultural Plant Journal 2022年第1期8卷 81-88页

作者： Kularb Laosatit Kitiya Amkul sompong chankaew Prakit Somta Department of Agronomy Faculty of Agriculture at Kamphaeng SaenKasetsart UniversityKamphaeng Saen CampusNakhon Pathom 73140Thailand Department of Agronomy Faculty of AgricultureKhon Kaen UniversityKhon Kaen 40002Thailand Center for Agricultural Biotechnology Kasetsart UniversityKamphaeng Saen CampusNakhon Pathom 73140Thailand Center of Excellence on Agricultural Biotechnology:(AG-BIO/MHESI) Bangkok 10900Thailand

Winged bean[Psophocarpus tetragonolobus(L.)DC.]is a vegetable legume crop.The center of origin,diversity and domestication of this crop are not known.In this study,we assessed the genetic diversity and population structure of 457 accessions of winged bean collected from six geographical regions(North,Northeast,East,West,and central,and South)in Thailand using 14 simple sequence repeat(SSR)markers.In total,the SSR markers detected only 55 alleles with an average of 3.9 alleles per locus.Observed heterozygosity was relatively high(0.15)and overall gene diversity was moderate(0.487).Gene diversity,allelic richness and observed heterozygosity in the six regions were comparable,while the estimated out-crossing rate was relatively high(16.4%).STRUCTURE analysis grouped the 457 winged bean accessions into three subpopulations.Neighbor-joining(NJ)analysis grouped all the accessions into two major clusters.Genetic groups identified by both STRUCTURE analysis and NJ analysis were unrelated to geographical origins.Principal coordinate analysis revealed no clear clustering of the winged bean accessions.Although genetic groups were not unrelated to geographical origins,most of the winged bean accessions with long pods(30 cm or higher in length)or having purple seed coats or purple young pods were grouped together.This suggested that the winged beans with long pods or with purple seed or purple young pods may have a single origin.Altogether,these results demonstrated that the genetic diversity of winged bean in Thailand was moderate with high genetic admixture.We argue that the high genetic admixture of the winged bean in Thailand is due to seed migration and relatively high outcrossing rate.

关键词： Winged bean Psophocarpus tetragonolobus Underutilized crop Diversity Population structure SSR

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Evaluation of stability and yield potential of upland rice genotypes in North and Northeast Thailand

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Journal of Integrative Agriculture 2018年第1期17卷 28-36页

作者： Wasan Jaruchai Tidarat Monkham sompong chankaew Bhalang Suriharn Jirawat Sanitchon Department of Plant Science and Agricultural Resources Faculty of AgricultureKhon Kaen University

The planting of upland rice is one cropping option in area with limited water availability and low soil fertility in North and Northeast Thailand. The varietal selection was determined by grain yield potential, wide adaptation, and good stability. This study was aimed at evaluation of indigenous upland rice germplasm for yield and yield stability in multi-locations. Thirty-six upland rice genotypes collected from six provinces of the North and Northeast Thailand and one check variety （Sewmaejan） were assessed under five locations in the rainy seasons of 2009 and 2010. The experiment was laid out in a randomized complete block design with three replications. The genotype grain yield was highly affected by location （59.90%）, followed by genotypes （G）xlocation （L） interaction （12.80%） and genotype （6.79%）. The most suitable location for the genotype eval- uation was L3 （Khon Kaen-KKU 10） which associated with stability of grain yield for all genotypes. Furthermore, biplot and regression analysis indicated that genotype numbers 6 （Jaowmong 1）, 10 （Neawmong 1）, 18 （Neawdum 1）, 19 （Leamna）, 20 （Prayaleamkang）, 32 （Kunwang 2）, and 33 （Kunwang 3） showed great yield stability over five locations. The genotypes will be applicant for upland rice production area and parental base in breeding program.

关键词： upland rice yield stability germplasm multi-location trails GxL interaction

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