 |
 |
 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Studies on Heterosis of Chili (Capsicum annuum L.)) ผู้เขียน: Nogluck Milerue, Maneechat Nikornpun สื่อสิ่งพิมพ์:pdf AbstractTen varieties of local chili were collected from different locations in Thailand. Observation and evaluation of those varieties were made in comparison with five male sterile varieties introduced from abroad. Five varieties were selected among these ten varieties as male parents. They were self-pollinated for two generations before crossing with two male sterile lines. Ten F1 hybrid lines were obtained and compared with the male parents at a private company in Chiang Rai and at the Department of Horticulture, Chiang Mai University. The results showed that the three F1 hybrid lines, K Y1-1 x Bang-Chang, KY 1- 1 x Nhum Khiew and KY 1-1 x Nhum Khiew Maejo yielded 76.96%, 39.13% and 8.09% higher than the male parents which are landrace varieties. Moreover, the fruit quality was also higher than those of the male parents. They also have a rather good shape, smooth skin and big fruits. The degree of pungency as measured by spectrophotometer was different from that measured by human bite test. The highest pungency of bite test was found in Fang chili whereas the spectrophotometer methods indicated that Bang- Chang chili had the highest pungency. KY 1-1 x Nhum Khiew Maejo, CF21789 x Nhum Khiew and KY 1-1 x Nhum Khiew showed high percentage of heterosis. Pungency of F1 hybrid tested by spectrophotometer methods indicated that different male parents produce different degree of pungency. Pungency was segregated between their male and female parents, revealing that the trait was polygenically controlled with mainly dominant gene action. Variation in degree of pungency was also controlled by environment. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Variation of small erect-fruited chili in Thailand) ผู้เขียน:Nongluck Milerue,  ดร.จุลภาค คุ้นวงศ์, รองศาสตราจารย์ , Darush Struss, ดร.สิริกุล วะสี สื่อสิ่งพิมพ์:pdf AbstractSingle cross varieties of small, erect-fruited chili (Prik-khee-noo in Thai) are required because of their high yield and high quality. Production of a single cross needs superior parental lines. This study was conducted to screen for parental lines which could be used for the production of superior single cross. To develop new varieties, high variation of the parental lines is required. Twenty-eight chili accessions (Capsicum annuum L.) cultivated in Thailand were collected and evaluated for variation with 343 single nucleotide polymorphic (SNP) markers at the Molecular Marker Laboratory at Hortigenetic Research (S.E. Asia) Ltd., Chiang Mai, Thailand. The results showed low variation among the 28 chili accessions with the polymorphism information content varying from 0.45 to 0.49 with an average of 0.46. The average genetic distance estimated from the SNP markers based on Jaccard's coefficient was 0.29 (ranging from 0.03 to 0.55). However, based on SNP analysis, the unweighted pair-group method with arithmetic averages divided the 28 chili accessions into two main groups and four subgroups. The first group consisted of 23 accessions mostly collected from varieties cultivated in Northeastern Thailand. The second group contained five accessions collected from different locations in other regions of Thailand. |
 |
|
 Researcherดร. อรรัตน์ มงคลพร, รองศาสตราจารย์ที่ทำงาน:ภาควิชาพืชสวน คณะเกษตร กำแพงแสน สาขาที่สนใจ:การประยุกต์ใช้ molecular marker เพื่อการปรับปรุงพันธุ์พืช, การใช้เทคโนโลยีชีวภาพเพื่อการปรับปรุงพันธุ์พืช, โรคแอนแทรคโนสในพริก Resume |