scholarly journals Sporophytic Self-incompatibility in Ipomoea trifida, a Close Relative of Sweet Potato

2000 ◽  
Vol 85 ◽  
pp. 191-196 ◽  
Author(s):  
Y KOWYAMA
Keyword(s):  
Sweet Potato ◽  
Close Relative ◽  
Self Incompatibility ◽  
Ipomoea Trifida

scholarly journals Molecular Characterization of a 313-kb Genomic Region Containing the Self-incompatibility Locus of Ipomoea trifida, a Diploid Relative of Sweet Potato

2004 ◽  
Vol 54 (2) ◽  
pp. 165-175 ◽  
Author(s):  
Rubens Norio Tomita ◽  
Go Suzuki ◽  
Kazuo Yoshida ◽  
Yukihito Yano ◽  
Tohru Tsuchiya ◽  
...  
Keyword(s):  
Molecular Characterization ◽  
Sweet Potato ◽  
Genomic Region ◽  
The Self ◽  
Self Incompatibility ◽  
Ipomoea Trifida ◽  
Incompatibility Locus

Visualization of the S-locus region in Ipomoea trifida: toward positional cloning of self-incompatibility genes

2004 ◽  
Vol 12 (5) ◽  
pp. 475-481 ◽  
Author(s):  
Go Suzuki ◽  
Saiko Tanaka ◽  
Maki Yamamoto ◽  
Rubens Norio Tomita ◽  
Yasuo Kowyama ◽  
...  
Keyword(s):  
Positional Cloning ◽  
Self Incompatibility ◽  
S Locus ◽  
Ipomoea Trifida

scholarly journals A Novel WRKY Transcription Factor from Ipomoea trifida, ItfWRKY70, Confers Drought Tolerance in Sweet Potato

2022 ◽  
Vol 23 (2) ◽  
pp. 686
Author(s):  
Sifan Sun ◽  
Xu Li ◽  
Shaopei Gao ◽  
Nan Nie ◽  
Huan Zhang ◽  
...  
Keyword(s):  
Drought Stress ◽  
Transgenic Plants ◽  
Drought Tolerance ◽  
Sweet Potato ◽  
Stress Responses ◽  
Leaf Tissue ◽  
Stomatal Aperture ◽  
Ros Scavenging ◽  
Ipomoea Trifida ◽  
Positive Role

WRKY transcription factors are one of the important families in plants, and have important roles in plant growth, abiotic stress responses, and defense regulation. In this study, we isolated a WRKY gene, ItfWRKY70, from the wild relative of sweet potato Ipomoea trifida (H.B.K.) G. Don. This gene was highly expressed in leaf tissue and strongly induced by 20% PEG6000 and 100 μM abscisic acid (ABA). Subcellar localization analyses indicated that ItfWRKY70 was localized in the nucleus. Overexpression of ItfWRKY70 significantly increased drought tolerance in transgenic sweet potato plants. The content of ABA and proline, and the activity of SOD and POD were significantly increased, whereas the content of malondialdehyde (MDA) and H2O2 were decreased in transgenic plants under drought stress. Overexpression of ItfWRKY70 up-regulated the genes involved in ABA biosynthesis, stress-response, ROS-scavenging system, and stomatal aperture in transgenic plants under drought stress. Taken together, these results demonstrated that ItfWRKY70 plays a positive role in drought tolerance by accumulating the content of ABA, regulating stomatal aperture and activating the ROS scavenging system in sweet potato.

Use of Ipomoea trifida (HBK.) G. Don germ plasm for sweet-potato improvement. 2. Fertility of synthetic hexaploids and triploids with 2n gametes of I. trifida, and their interspecific crossability with sweet potato

Genome ◽  
1991 ◽  
Vol 34 (2) ◽  
pp. 209-214 ◽  
Author(s):  
Rosanna Freyre ◽  
Masaru Iwanaga ◽  
Gisella Orjeda
Keyword(s):  
Sweet Potato ◽  
Egg Production ◽  
Ipomoea Batatas ◽  
2N Gametes ◽  
Pollen Production ◽  
2N Pollen ◽  
Ipomoea Trifida ◽  
Potato Improvement ◽  
Synthetic Hexaploids ◽  
Interspecific Crossability

Twenty-two synthetic hexaploids and 33 triploids with 2n pollen production of Ipomoea trifida were used in crosses to estimate their male and female fertility and their crossability with sweet potato, Ipomoea batatas (L.) Lam. Several important conclusions were drawn. (i) The fertility of pollen of the triploid plants was confirmed, which suggested they are truly functional 2n pollen. (ii) The average male fertility of hexaploid plants was higher than that of triploid with 2n pollen production plants. (iii) 2n egg production was observed in several triploid genotypes, (iv) From a polycross, 3079 seeds with normal shapes were produced. These represent a population of hexaploid I. trifida with a wide genetic base, and they may be important material for sweet-potato improvement, (v) A total of 3275 seeds were obtained from crosses with six sweet-potato female parents, of which only 60 germinated, indicating the existence of an interspecific barrier. The implications of 2n gametes for breeding and evolution of sweet potato are also discussed.Key words: Ipomoea batatas, Ipomoea trifida, 2n gametes, sexual polyploidization, triploid.

scholarly journals Employing CRISPR/Cas Technology for the Improvement of Potato and Other Tuber Crops

2021 ◽  
Vol 12 ◽  
Author(s):  
Dilnur Tussipkan ◽  
Shuga A. Manabayeva
Keyword(s):  
Genome Editing ◽  
Sweet Potato ◽  
Biotic Resistance ◽  
Biological Science ◽  
Self Incompatibility ◽  
Free Products ◽  
Advantages And Disadvantages ◽  
Fundamental Information ◽  
New Breeding Technologies ◽  
Tuber Crops

New breeding technologies have not only revolutionized biological science, but have also been employed to generate transgene-free products. Genome editing is a powerful technology that has been used to modify genomes of several important crops. This review describes the basic mechanisms, advantages and disadvantages of genome editing systems, such as ZFNs, TALENs, and CRISPR/Cas. Secondly, we summarize in detail all studies of the CRISPR/Cas system applied to potato and other tuber crops, such as sweet potato, cassava, yam, and carrot. Genes associated with self-incompatibility, abiotic-biotic resistance, nutrient–antinutrient content, and post-harvest factors targeted utilizing the CRISPR/Cas system are analyzed in this review. We hope that this review provides fundamental information that will be useful for future breeding of tuber crops to develop novel cultivars.

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