Research On Thermal Resistant And Cold Tolerance Of Wild Pepper And Ordinary Pepper

In a certain extent distant hybridization between species was broken on the boundary, man-made promote different species of gene introgressive between and exchange, is advantageous traits into target materials so as to achieve the effective way of new species, is to introduce the exogenous gene, one of the ways to create many variation. Through this kind of means already will, breeding excellent or specific genes from wildlife or allied genera and kind of turn, and create new varieties germplasm resources.This experiment with wild chili (XiaoMiLa) and different fruit varieties (big type chili representative, lantern form 419 horn-type ChaoTianJiao HZ), m. for material, in artificially controlled environment, low-temperature high temperature to capsaicin seedlings research with the leaves (five) effect of internal physiological and biochemical indexes. The cultivation of four pepper varieties, with wild XiaoMiLa parents as male parent, three different shape as a female pepper varieties in QuXiong bolls take charge of artificial way pollination early-spring cultivation (431 x M, 419 x M, HZ x M). In order to investigate the physiological mechanism inverse resistance chili pepper, and for the cultivation, resistant to inverse varieties of screening and breeding work according to provide theoretical and technology.1 Different high temperature stress processing, the most suitable temperature is 37℃/ 26℃(day/night temperature); Different cryogenic stress processing, the optimum temperature is moderate stress, 10℃/ 5℃(day/night temperature).2 A preliminary analysis of the data can be concluded, wild XiaoMiLa low temperature resistance, heat resistance are best, bell peppers, low temperature resistance worst ChaoTianJiao high temperature resistant ability is good, big horn pepper heat resistance to cold sex center.3 In the cryogenic stress processing and time, chili blade increases within the content of proline very significantly higher increase than the control, and other different shape chili, cryogenic stress its soluble sugar, soluble protein content and main protective enzyme (SOD, POD, CAT) are below different shape chili, comprehensive assessment XiaoMiLa wild chili low temperature resistance capability is strong, each index all better than other chili, ChaoTianJiao ox horn pepper second fight microtherm ability is better also, low temperature resistance suffer the bell peppers seriously.4 By continuous high-temperature processing, chili blade proline content within extremely obviously than the control, high temperature stress its soluble sugar, soluble protein are increased obviously, protective enzyme (SOD, POD, CAT) content and MDA content cryogenic stress the extension of time with a rising trend of finally dropped first. Rise significantly, comprehensive assessment XiaoMiLa wild chili resistant to high ability, all indexes is superior to other chili ChaoTianJiao bell peppers, second high temperature resisting capacity is better also, ox horn pepper most not high temperature resistant suffer serious.5 Early-spring cultivation 431 x M, 419 x M, strong bad seeds, light-haired, embryos was not complete. HZ x M capsicum frutescens var HZ and wild chili of XiaoMiLa early-spring cultivation can use. HZ x M early-spring cultivation with various indexes of ChaoTianJiao HZ difference is bigger, incompatibilities with paternal wild chili (M) is compared differences.