Combining Ability of Catechin and Caffeine in Tea (Camellia sinensis (L.) O.Kuntze)
Diallel mating designs are used in many breeding programmes because of the important genetic information they offer to plant breeders.Eight biochemical traits of Tea (Camellia sinensis (L.) O.Kuntze) were investigated to determine the underlying gene action and the general combining abilities (GCA) and specific combining abilities (SCA)of parents and crosses using diallel mating system.There were significant (p<0.05)differences among the genotypes for all the biochemical traits studied.The GCA effects were significant for six of the traits, namely GA, EGC, caffeine, ECG, EGCG and total catechin implying that these traits are governed by additive gene effects.SCA on the other hand was significant for EGC, Caffeine, EC, EGCG, and total catechin.The GCA to SCA variance ratios for EGC, Caffeine, EGCG and total catechins were 2.27, 2.18, 2.81, and 1.39, respectively, indicating that these traits are predominantly influenced by additive genes.Maternal effects were significant for EGC, EGCG and total catechin signifying importance of the choice of female parents in breeding programmes targeting these traits.The study revealed that parents which would produce above average progenies for total catechins are AHP S15/10 and EPK TN14-3.This information will be very valuable for tea breeding programmes targeting high black/green tea quality cultivars.
Diallel analysis Tea (Camellia sinensis (L.) O.Kuntze) additive GCA SCA
Eliud K.Kireger Nelson M.Lubanga Samson M.Kamunya Oliver Kiplagat John K.Wanyoko Richard M.Chalo
Tea Research Foundation of Kenya, P.O.Box 820, 20200, Kericho, Kenya University of Eldoret, P.O Box 1125, 30100, Eldoret, Kenya
国际会议
International Tea Symposium 2014(ITS 2014)(国际茶叶学术研讨会)
杭州
英文
233-239
2014-09-10（万方平台首次上网日期，不代表论文的发表时间）